x86: Add -mfunction-return=

Add -mfunction-return= option to convert function return to call and
return thunks.  The default is 'keep', which keeps function return
unmodified.  'thunk' converts function return to call and return thunk.
'thunk-inline' converts function return to inlined call and return thunk.
'thunk-extern' converts function return to external call and return
thunk provided in a separate object file.  You can control this behavior
for a specific function by using the function attribute function_return.

Function return thunk is the same as memory thunk for -mindirect-branch=
where the return address is at the top of the stack:

__x86_return_thunk:
	call L2
L1:
	pause
	lfence
	jmp L1
L2:
	lea 8(%rsp), %rsp|lea 4(%esp), %esp
	ret

and function return becomes

	jmp __x86_return_thunk

-mindirect-branch= tests are updated with -mfunction-return=keep to
avoid false test failures when -mfunction-return=thunk is added to
RUNTESTFLAGS for "make check".

gcc/

	Backport from mainline
	2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/i386-protos.h (ix86_output_function_return): New.
	* config/i386/i386.c (ix86_set_indirect_branch_type): Also
	set function_return_type.
	(indirect_thunk_name): Add ret_p to indicate thunk for function
	return.
	(output_indirect_thunk_function): Pass false to
	indirect_thunk_name.
	(ix86_output_indirect_branch_via_reg): Likewise.
	(ix86_output_indirect_branch_via_push): Likewise.
	(output_indirect_thunk_function): Create alias for function
	return thunk if regno < 0.
	(ix86_output_function_return): New function.
	(ix86_handle_fndecl_attribute): Handle function_return.
	(ix86_attribute_table): Add function_return.
	* config/i386/i386.h (machine_function): Add
	function_return_type.
	* config/i386/i386.md (simple_return_internal): Use
	ix86_output_function_return.
	(simple_return_internal_long): Likewise.
	* config/i386/i386.opt (mfunction-return=): New option.
	(indirect_branch): Mention -mfunction-return=.
	* doc/extend.texi: Document function_return function attribute.
	* doc/invoke.texi: Document -mfunction-return= option.

gcc/testsuite/

	Backport from mainline
	2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>

	* gcc.target/i386/indirect-thunk-1.c (dg-options): Add
	-mfunction-return=keep.
	* gcc.target/i386/indirect-thunk-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-8.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-7.c: Likewise.
	* gcc.target/i386/ret-thunk-1.c: New test.
	* gcc.target/i386/ret-thunk-10.c: Likewise.
	* gcc.target/i386/ret-thunk-11.c: Likewise.
	* gcc.target/i386/ret-thunk-12.c: Likewise.
	* gcc.target/i386/ret-thunk-13.c: Likewise.
	* gcc.target/i386/ret-thunk-14.c: Likewise.
	* gcc.target/i386/ret-thunk-15.c: Likewise.
	* gcc.target/i386/ret-thunk-16.c: Likewise.
	* gcc.target/i386/ret-thunk-2.c: Likewise.
	* gcc.target/i386/ret-thunk-3.c: Likewise.
	* gcc.target/i386/ret-thunk-4.c: Likewise.
	* gcc.target/i386/ret-thunk-5.c: Likewise.
	* gcc.target/i386/ret-thunk-6.c: Likewise.
	* gcc.target/i386/ret-thunk-7.c: Likewise.
	* gcc.target/i386/ret-thunk-8.c: Likewise.
	* gcc.target/i386/ret-thunk-9.c: Likewise.

i386: Don't use ASM_OUTPUT_DEF for TARGET_MACHO

ASM_OUTPUT_DEF isn't defined for TARGET_MACHO.  Use ASM_OUTPUT_LABEL to
generate the __x86_return_thunk label, instead of the set directive.
Update testcase to remove the __x86_return_thunk label check.  Since
-fno-pic is ignored on Darwin, update testcases to sscan or "push"
only on Linux.

gcc/

	Backport from mainline
	2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/83839
	* config/i386/i386.c (output_indirect_thunk_function): Use
	ASM_OUTPUT_LABEL, instead of ASM_OUTPUT_DEF, for TARGET_MACHO
	for  __x86.return_thunk.

gcc/testsuite/

	Backport from mainline
	2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/83839
	* gcc.target/i386/indirect-thunk-1.c: Scan for "push" only on
	Linux.
	* gcc.target/i386/indirect-thunk-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-register-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-register-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-register-4.c: Likewise.
	* gcc.target/i386/ret-thunk-10.c: Likewise.
	* gcc.target/i386/ret-thunk-11.c: Likewise.
	* gcc.target/i386/ret-thunk-12.c: Likewise.
	* gcc.target/i386/ret-thunk-13.c: Likewise.
	* gcc.target/i386/ret-thunk-14.c: Likewise.
	* gcc.target/i386/ret-thunk-15.c: Likewise.
	* gcc.target/i386/ret-thunk-9.c: Don't check the
	__x86_return_thunk label.
	Scan for "push" only for Linux.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-7-branch@256734 138bc75d-0d04-0410-961f-82ee72b054a4

58 files changed, 641 insertions, 74 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7692a2b3913b..885a12110805 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,43 @@
 2018-01-16  H.J. Lu  <hongjiu.lu@intel.com>
 
 	Backport from mainline
+	2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/83839
+	* config/i386/i386.c (output_indirect_thunk_function): Use
+	ASM_OUTPUT_LABEL, instead of ASM_OUTPUT_DEF, for TARGET_MACHO
+	for  __x86.return_thunk.
+
+	Backport from mainline
+	2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/i386/i386-protos.h (ix86_output_function_return): New.
+	* config/i386/i386.c (ix86_set_indirect_branch_type): Also
+	set function_return_type.
+	(indirect_thunk_name): Add ret_p to indicate thunk for function
+	return.
+	(output_indirect_thunk_function): Pass false to
+	indirect_thunk_name.
+	(ix86_output_indirect_branch_via_reg): Likewise.
+	(ix86_output_indirect_branch_via_push): Likewise.
+	(output_indirect_thunk_function): Create alias for function
+	return thunk if regno < 0.
+	(ix86_output_function_return): New function.
+	(ix86_handle_fndecl_attribute): Handle function_return.
+	(ix86_attribute_table): Add function_return.
+	* config/i386/i386.h (machine_function): Add
+	function_return_type.
+	* config/i386/i386.md (simple_return_internal): Use
+	ix86_output_function_return.
+	(simple_return_internal_long): Likewise.
+	* config/i386/i386.opt (mfunction-return=): New option.
+	(indirect_branch): Mention -mfunction-return=.
+	* doc/extend.texi: Document function_return function attribute.
+	* doc/invoke.texi: Document -mfunction-return= option.
+
+2018-01-16  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backport from mainline
 	2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/i386/i386-opts.h (indirect_branch): New.
diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h
index bcdd9872db96..42eece357668 100644
--- a/gcc/config/i386/i386-protos.h
+++ b/gcc/config/i386/i386-protos.h
@@ -314,6 +314,7 @@ extern enum attr_cpu ix86_schedule;
 
 extern const char * ix86_output_call_insn (rtx_insn *insn, rtx call_op);
 extern const char * ix86_output_indirect_jmp (rtx call_op, bool ret_p);
+extern const char * ix86_output_function_return (bool long_p);
 extern bool ix86_operands_ok_for_move_multiple (rtx *operands, bool load,
 						enum machine_mode mode);
 
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 7e779c174bce..8fb89027d973 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -7188,6 +7188,31 @@ ix86_set_indirect_branch_type (tree fndecl)
       else
 	cfun->machine->indirect_branch_type = ix86_indirect_branch;
     }
+
+  if (cfun->machine->function_return_type == indirect_branch_unset)
+    {
+      tree attr = lookup_attribute ("function_return",
+				    DECL_ATTRIBUTES (fndecl));
+      if (attr != NULL)
+	{
+	  tree args = TREE_VALUE (attr);
+	  if (args == NULL)
+	    gcc_unreachable ();
+	  tree cst = TREE_VALUE (args);
+	  if (strcmp (TREE_STRING_POINTER (cst), "keep") == 0)
+	    cfun->machine->function_return_type = indirect_branch_keep;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk") == 0)
+	    cfun->machine->function_return_type = indirect_branch_thunk;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-inline") == 0)
+	    cfun->machine->function_return_type = indirect_branch_thunk_inline;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-extern") == 0)
+	    cfun->machine->function_return_type = indirect_branch_thunk_extern;
+	  else
+	    gcc_unreachable ();
+	}
+      else
+	cfun->machine->function_return_type = ix86_function_return;
+    }
 }
 
 /* Establish appropriate back-end context for processing the function
@@ -12000,8 +12025,12 @@ static int indirect_thunks_bnd_used;
 /* Fills in the label name that should be used for the indirect thunk.  */
 
 static void
-indirect_thunk_name (char name[32], int regno, bool need_bnd_p)
+indirect_thunk_name (char name[32], int regno, bool need_bnd_p,
+		     bool ret_p)
 {
+  if (regno >= 0 && ret_p)
+    gcc_unreachable ();
+
   if (USE_HIDDEN_LINKONCE)
     {
       const char *bnd = need_bnd_p ? "_bnd" : "";
@@ -12016,7 +12045,10 @@ indirect_thunk_name (char name[32], int regno, bool need_bnd_p)
 		   bnd, reg_prefix, reg_names[regno]);
 	}
       else
-	sprintf (name, "__x86_indirect_thunk%s", bnd);
+	{
+	  const char *ret = ret_p ? "return" : "indirect";
+	  sprintf (name, "__x86_%s_thunk%s", ret, bnd);
+	}
     }
   else
     {
@@ -12029,10 +12061,20 @@ indirect_thunk_name (char name[32], int regno, bool need_bnd_p)
 	}
       else
 	{
-	  if (need_bnd_p)
-	    ASM_GENERATE_INTERNAL_LABEL (name, "LITB", 0);
+	  if (ret_p)
+	    {
+	      if (need_bnd_p)
+		ASM_GENERATE_INTERNAL_LABEL (name, "LRTB", 0);
+	      else
+		ASM_GENERATE_INTERNAL_LABEL (name, "LRT", 0);
+	    }
 	  else
-	    ASM_GENERATE_INTERNAL_LABEL (name, "LIT", 0);
+	    {
+	      if (need_bnd_p)
+		ASM_GENERATE_INTERNAL_LABEL (name, "LITB", 0);
+	      else
+		ASM_GENERATE_INTERNAL_LABEL (name, "LIT", 0);
+	    }
 	}
     }
 }
@@ -12127,7 +12169,7 @@ output_indirect_thunk_function (bool need_bnd_p, int regno)
   tree decl;
 
   /* Create __x86_indirect_thunk/__x86_indirect_thunk_bnd.  */
-  indirect_thunk_name (name, regno, need_bnd_p);
+  indirect_thunk_name (name, regno, need_bnd_p, false);
   decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
 		     get_identifier (name),
 		     build_function_type_list (void_type_node, NULL_TREE));
@@ -12170,6 +12212,36 @@ output_indirect_thunk_function (bool need_bnd_p, int regno)
 	ASM_OUTPUT_LABEL (asm_out_file, name);
       }
 
+  if (regno < 0)
+    {
+      /* Create alias for __x86.return_thunk/__x86.return_thunk_bnd.  */
+      char alias[32];
+
+      indirect_thunk_name (alias, regno, need_bnd_p, true);
+#if TARGET_MACHO
+      if (TARGET_MACHO)
+	{
+	  fputs ("\t.weak_definition\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  fputs ("\n\t.private_extern\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  putc ('\n', asm_out_file);
+	  ASM_OUTPUT_LABEL (asm_out_file, alias);
+	}
+#else
+      ASM_OUTPUT_DEF (asm_out_file, alias, name);
+      if (USE_HIDDEN_LINKONCE)
+	{
+	  fputs ("\t.globl\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  putc ('\n', asm_out_file);
+	  fputs ("\t.hidden\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  putc ('\n', asm_out_file);
+	}
+#endif
+    }
+
   DECL_INITIAL (decl) = make_node (BLOCK);
   current_function_decl = decl;
   allocate_struct_function (decl, false);
@@ -28775,7 +28847,7 @@ ix86_output_indirect_branch_via_reg (rtx call_op, bool sibcall_p)
 	  else
 	    indirect_thunks_used |= 1 << i;
 	}
-      indirect_thunk_name (thunk_name_buf, regno, need_bnd_p);
+      indirect_thunk_name (thunk_name_buf, regno, need_bnd_p, false);
       thunk_name = thunk_name_buf;
     }
   else
@@ -28884,7 +28956,7 @@ ix86_output_indirect_branch_via_push (rtx call_op, const char *xasm,
 	  else
 	    indirect_thunk_needed = true;
 	}
-      indirect_thunk_name (thunk_name_buf, regno, need_bnd_p);
+      indirect_thunk_name (thunk_name_buf, regno, need_bnd_p, false);
       thunk_name = thunk_name_buf;
     }
   else
@@ -29019,6 +29091,46 @@ ix86_output_indirect_jmp (rtx call_op, bool ret_p)
     return "%!jmp\t%A0";
 }
 
+/* Output function return.  CALL_OP is the jump target.  Add a REP
+   prefix to RET if LONG_P is true and function return is kept.  */
+
+const char *
+ix86_output_function_return (bool long_p)
+{
+  if (cfun->machine->function_return_type != indirect_branch_keep)
+    {
+      char thunk_name[32];
+      bool need_bnd_p = ix86_bnd_prefixed_insn_p (current_output_insn);
+
+      if (cfun->machine->function_return_type
+	  != indirect_branch_thunk_inline)
+	{
+	  bool need_thunk = (cfun->machine->function_return_type
+			     == indirect_branch_thunk);
+	  indirect_thunk_name (thunk_name, -1, need_bnd_p, true);
+	  if (need_bnd_p)
+	    {
+	      indirect_thunk_bnd_needed |= need_thunk;
+	      fprintf (asm_out_file, "\tbnd jmp\t%s\n", thunk_name);
+	    }
+	  else
+	    {
+	      indirect_thunk_needed |= need_thunk;
+	      fprintf (asm_out_file, "\tjmp\t%s\n", thunk_name);
+	    }
+	}
+      else
+	output_indirect_thunk (need_bnd_p, -1);
+
+      return "";
+    }
+
+  if (!long_p || ix86_bnd_prefixed_insn_p (current_output_insn))
+    return "%!ret";
+
+  return "rep%; ret";
+}
+
 /* Output the assembly for a call instruction.  */
 
 const char *
@@ -42090,6 +42202,28 @@ ix86_handle_fndecl_attribute (tree *node, tree name, tree args, int,
 	}
     }
 
+  if (is_attribute_p ("function_return", name))
+    {
+      tree cst = TREE_VALUE (args);
+      if (TREE_CODE (cst) != STRING_CST)
+	{
+	  warning (OPT_Wattributes,
+		   "%qE attribute requires a string constant argument",
+		   name);
+	  *no_add_attrs = true;
+	}
+      else if (strcmp (TREE_STRING_POINTER (cst), "keep") != 0
+	       && strcmp (TREE_STRING_POINTER (cst), "thunk") != 0
+	       && strcmp (TREE_STRING_POINTER (cst), "thunk-inline") != 0
+	       && strcmp (TREE_STRING_POINTER (cst), "thunk-extern") != 0)
+	{
+	  warning (OPT_Wattributes,
+		   "argument to %qE attribute is not "
+		   "(keep|thunk|thunk-inline|thunk-extern)", name);
+	  *no_add_attrs = true;
+	}
+    }
+
   return NULL_TREE;
 }
 
@@ -46400,6 +46534,8 @@ static const struct attribute_spec ix86_attribute_table[] =
     ix86_handle_no_caller_saved_registers_attribute, false },
   { "indirect_branch", 1, 1, true, false, false,
     ix86_handle_fndecl_attribute, false },
+  { "function_return", 1, 1, true, false, false,
+    ix86_handle_fndecl_attribute, false },
 
   /* End element.  */
   { NULL,        0, 0, false, false, false, NULL, false }
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index d8370ae1dc87..e7da790f1b1f 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -2616,6 +2616,9 @@ struct GTY(()) machine_function {
      "indirect_jump" or "tablejump".  */
   BOOL_BITFIELD has_local_indirect_jump : 1;
 
+  /* How to generate function return.  */
+  ENUM_BITFIELD(indirect_branch) function_return_type : 3;
+
   /* If true, the current function is a function specified with
      the "interrupt" or "no_caller_saved_registers" attribute.  */
   BOOL_BITFIELD no_caller_saved_registers : 1;
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index cd2e73cf9d3b..d112bdb8552f 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -12315,7 +12315,7 @@
 (define_insn "simple_return_internal"
   [(simple_return)]
   "reload_completed"
-  "%!ret"
+  "* return ix86_output_function_return (false);"
   [(set_attr "length" "1")
    (set_attr "atom_unit" "jeu")
    (set_attr "length_immediate" "0")
@@ -12337,12 +12337,7 @@
   [(simple_return)
    (unspec [(const_int 0)] UNSPEC_REP)]
   "reload_completed"
-{
-  if (ix86_bnd_prefixed_insn_p (insn))
-    return "%!ret";
-
-  return "rep%; ret";
-}
+  "* return ix86_output_function_return (true);"
   [(set_attr "length" "2")
    (set_attr "atom_unit" "jeu")
    (set_attr "length_immediate" "0")
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index c076d9c70ab2..b07388d95a93 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -932,9 +932,13 @@ mindirect-branch=
 Target Report RejectNegative Joined Enum(indirect_branch) Var(ix86_indirect_branch) Init(indirect_branch_keep)
 Convert indirect call and jump to call and return thunks.
 
+mfunction-return=
+Target Report RejectNegative Joined Enum(indirect_branch) Var(ix86_function_return) Init(indirect_branch_keep)
+Convert function return to call and return thunk.
+
 Enum
 Name(indirect_branch) Type(enum indirect_branch)
-Known indirect branch choices (for use with the -mindirect-branch= option):
+Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
 
 EnumValue
 Enum(indirect_branch) String(keep) Value(indirect_branch_keep)
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 935381da6fa9..46e0a3623a61 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -5550,6 +5550,15 @@ call and jump to call and return thunk.  @samp{thunk-inline} converts
 indirect call and jump to inlined call and return thunk.
 @samp{thunk-extern} converts indirect call and jump to external call
 and return thunk provided in a separate object file.
+
+@item function_return("@var{choice}")
+@cindex @code{function_return} function attribute, x86
+On x86 targets, the @code{function_return} attribute causes the compiler
+to convert function return with @var{choice}.  @samp{keep} keeps function
+return unmodified.  @samp{thunk} converts function return to call and
+return thunk.  @samp{thunk-inline} converts function return to inlined
+call and return thunk.  @samp{thunk-extern} converts function return to
+external call and return thunk provided in a separate object file.
 @end table
 
 On the x86, the inliner does not inline a
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 4979c8c939dd..f3eb54b16685 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1211,7 +1211,7 @@ See RS/6000 and PowerPC Options.
 -mavx256-split-unaligned-load  -mavx256-split-unaligned-store @gol
 -malign-data=@var{type}  -mstack-protector-guard=@var{guard} @gol
 -mmitigate-rop  -mgeneral-regs-only @gol
--mindirect-branch=@var{choice}}
+-mindirect-branch=@var{choice} -mfunction-return==@var{choice}}
 
 @emph{x86 Windows Options}
 @gccoptlist{-mconsole  -mcygwin  -mno-cygwin  -mdll @gol
@@ -25698,6 +25698,17 @@ to external call and return thunk provided in a separate object file.
 You can control this behavior for a specific function by using the
 function attribute @code{indirect_branch}.  @xref{Function Attributes}.
 
+@item -mfunction-return=@var{choice}
+@opindex -mfunction-return
+Convert function return with @var{choice}.  The default is @samp{keep},
+which keeps function return unmodified.  @samp{thunk} converts function
+return to call and return thunk.  @samp{thunk-inline} converts function
+return to inlined call and return thunk.  @samp{thunk-extern} converts
+function return to external call and return thunk provided in a separate
+object file.  You can control this behavior for a specific function by
+using the function attribute @code{function_return}.
+@xref{Function Attributes}.
+
 @end table
 
 These @samp{-m} switches are supported in addition to the above
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8d08237f52f8..9cd1d4f297d8 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,95 @@
 2018-01-16  H.J. Lu  <hongjiu.lu@intel.com>
 
 	Backport from mainline
+	2018-01-15  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/83839
+	* gcc.target/i386/indirect-thunk-1.c: Scan for "push" only on
+	Linux.
+	* gcc.target/i386/indirect-thunk-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-register-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-register-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-register-4.c: Likewise.
+	* gcc.target/i386/ret-thunk-10.c: Likewise.
+	* gcc.target/i386/ret-thunk-11.c: Likewise.
+	* gcc.target/i386/ret-thunk-12.c: Likewise.
+	* gcc.target/i386/ret-thunk-13.c: Likewise.
+	* gcc.target/i386/ret-thunk-14.c: Likewise.
+	* gcc.target/i386/ret-thunk-15.c: Likewise.
+	* gcc.target/i386/ret-thunk-9.c: Don't check the
+	__x86_return_thunk label.
+	Scan for "push" only for Linux.
+
+	Backport from mainline
+	2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* gcc.target/i386/indirect-thunk-1.c (dg-options): Add
+	-mfunction-return=keep.
+	* gcc.target/i386/indirect-thunk-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-8.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-7.c: Likewise.
+	* gcc.target/i386/ret-thunk-1.c: New test.
+	* gcc.target/i386/ret-thunk-10.c: Likewise.
+	* gcc.target/i386/ret-thunk-11.c: Likewise.
+	* gcc.target/i386/ret-thunk-12.c: Likewise.
+	* gcc.target/i386/ret-thunk-13.c: Likewise.
+	* gcc.target/i386/ret-thunk-14.c: Likewise.
+	* gcc.target/i386/ret-thunk-15.c: Likewise.
+	* gcc.target/i386/ret-thunk-16.c: Likewise.
+	* gcc.target/i386/ret-thunk-2.c: Likewise.
+	* gcc.target/i386/ret-thunk-3.c: Likewise.
+	* gcc.target/i386/ret-thunk-4.c: Likewise.
+	* gcc.target/i386/ret-thunk-5.c: Likewise.
+	* gcc.target/i386/ret-thunk-6.c: Likewise.
+	* gcc.target/i386/ret-thunk-7.c: Likewise.
+	* gcc.target/i386/ret-thunk-8.c: Likewise.
+	* gcc.target/i386/ret-thunk-9.c: Likewise.
+
+2018-01-16  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backport from mainline
 	2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* gcc.target/i386/indirect-thunk-1.c: New test.
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
index d983e1c3e26e..e365ef5698a3 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -11,7 +11,7 @@ male_indirect_jump (long offset)
   dispatch(offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
index 58f09b42d8a7..05a51ad9157a 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -11,7 +11,7 @@ male_indirect_jump (long offset)
   dispatch[offset](offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
index f20d35c19b6a..3c0d4c39f0bd 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
index 0eff8fb658a9..14d4ef6dd985 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-5.c
index a25b20dd8082..b4836c38d6c9 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-5.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk" } */
+/* { dg-options "-O2 -mfunction-return=keep -fpic -fno-plt -mindirect-branch=thunk" } */
 
 extern void bar (void);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-6.c
index cff114a6c293..1f06bd1af741 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-6.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk" } */
+/* { dg-options "-O2 -mfunction-return=keep -fpic -fno-plt -mindirect-branch=thunk" } */
 
 extern void bar (void);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
index afdb60079864..bc6b47a636e2 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -35,7 +35,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
index d64d978b6995..2257be3affac 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -14,7 +14,7 @@ male_indirect_jump (long offset)
   dispatch(offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
index 93067454d3dc..e9cfdc5879ed 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   dispatch[offset](offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
index 97744d65729f..f938db050f70 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -14,7 +14,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler {\tpause} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
index bfce3ea5cb25..4e58599692a3 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -13,7 +13,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler {\tpause} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
index 0833606046b5..b8d50249d8bd 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -14,7 +14,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
index 2eba0fbd9b2a..455adabfe0e0 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -13,7 +13,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
index f58427eae116..4595b841ec0d 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -36,7 +36,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" } } */
 /* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
index 564ed39547c2..d730d31bda1e 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-1.c
index 50fbee20a5a8..5e3e118e9bdf 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { ! x32 } } } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fno-pic" } */
 
 void (*dispatch) (char *);
 char buf[10];
@@ -10,7 +10,7 @@ foo (void)
   dispatch (buf);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "pushq\[ \t\]%rax" { target x32 } } } */
 /* { dg-final { scan-assembler "bnd jmp\[ \t\]*__x86_indirect_thunk_bnd" } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-2.c
index 2976e67adced..2801aa4192ee 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { ! x32 } } } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fno-pic" } */
 
 void (*dispatch) (char *);
 char buf[10];
@@ -11,7 +11,7 @@ foo (void)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "pushq\[ \t\]%rax" { target x32 } } } */
 /* { dg-final { scan-assembler "bnd jmp\[ \t\]*__x86_indirect_thunk_bnd" } } */
 /* { dg-final { scan-assembler "bnd jmp\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-3.c
index da4bc98ef237..70b4fb36eeac 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { *-*-linux* && { ! x32 } } } } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fpic -fno-plt" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fpic -fno-plt" } */
 
 void bar (char *);
 char buf[10];
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-4.c
index c64d12ef989a..3baf03ee77cb 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target { *-*-linux* && { ! x32 } } } } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fpic -fno-plt" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fpic -fno-plt" } */
 
 void bar (char *);
 char buf[10];
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
index 49f27b494657..edeb264218c4 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -11,7 +11,7 @@ male_indirect_jump (long offset)
   dispatch(offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
index a1e3eb6fc741..1d00413a76ad 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -11,7 +11,7 @@ male_indirect_jump (long offset)
   dispatch[offset](offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
index 395634e7e5c3..06ebf1c90633 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
index fd3f63379a19..1c8f94466361 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-5.c
index ba2f92b6f348..21740ac5b7f4 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-5.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-extern" } */
+/* { dg-options "-O2 -mfunction-return=keep -fpic -fno-plt -mindirect-branch=thunk-extern" } */
 
 extern void bar (void);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-6.c
index 0c5a2d472c6c..a77c1f470b80 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-6.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-extern" } */
+/* { dg-options "-O2 -mfunction-return=keep -fpic -fno-plt -mindirect-branch=thunk-extern" } */
 
 extern void bar (void);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
index 665252327aac..86e9fd1f1e48 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -35,7 +35,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
 /* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
index 68c0ff713b33..3ecde8788677 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -11,7 +11,7 @@ male_indirect_jump (long offset)
   dispatch(offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
 /* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
 /* { dg-final { scan-assembler {\tpause} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
index e2da1fcb6830..df32a19a2b52 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -11,7 +11,7 @@ male_indirect_jump (long offset)
   dispatch[offset](offset);
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
 /* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
 /* { dg-final { scan-assembler {\tpause} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
index 244fec708d68..9540996de017 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times {\tpause} 1 } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
index 107ebe32f548..f3db6e2441f5 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times {\tpause} 1 } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-5.c
index 17b04ef2229c..0f687c3b0276 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-5.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-inline" } */
+/* { dg-options "-O2 -mfunction-return=keep -fpic -fno-plt -mindirect-branch=thunk-inline" } */
 
 extern void bar (void);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-6.c
index d9eb11285aa2..b27c6fc96a2a 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-6.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target *-*-linux* } } */
-/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-inline" } */
+/* { dg-options "-O2 -mfunction-return=keep -fpic -fno-plt -mindirect-branch=thunk-inline" } */
 
 extern void bar (void);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
index d02b1dcb1b9f..764a375fc37d 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -35,7 +35,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
 /* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-1.c b/gcc/testsuite/gcc.target/i386/ret-thunk-1.c
new file mode 100644
index 000000000000..7223f67ba5ec
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-1.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk" } */
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-10.c b/gcc/testsuite/gcc.target/i386/ret-thunk-10.c
new file mode 100644
index 000000000000..3a6727b5c54e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-10.c
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 2 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 2 } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk_(r|e)ax:" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-11.c b/gcc/testsuite/gcc.target/i386/ret-thunk-11.c
new file mode 100644
index 000000000000..b8f68188313f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-11.c
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-extern -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk_(r|e)ax:" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-12.c b/gcc/testsuite/gcc.target/i386/ret-thunk-12.c
new file mode 100644
index 000000000000..01b0a02f80b0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-12.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk_(r|e)ax:" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-13.c b/gcc/testsuite/gcc.target/i386/ret-thunk-13.c
new file mode 100644
index 000000000000..4b497b5f8af6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-13.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
+
+extern void (*bar) (void);
+extern int foo (void) __attribute__ ((function_return("thunk")));
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 2 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 2 } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 3 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 3 } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-14.c b/gcc/testsuite/gcc.target/i386/ret-thunk-14.c
new file mode 100644
index 000000000000..4ae4c44a3fdb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-14.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
+
+extern void (*bar) (void);
+
+__attribute__ ((function_return("thunk-inline")))
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-15.c b/gcc/testsuite/gcc.target/i386/ret-thunk-15.c
new file mode 100644
index 000000000000..5b5bc765a7e8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-15.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -fno-pic" } */
+
+extern void (*bar) (void);
+
+__attribute__ ((function_return("thunk-extern"), indirect_branch("thunk")))
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-16.c b/gcc/testsuite/gcc.target/i386/ret-thunk-16.c
new file mode 100644
index 000000000000..a16cad16aaa1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-16.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline -mindirect-branch=thunk-extern -fno-pic" } */
+
+extern void (*bar) (void);
+
+__attribute__ ((function_return("keep"), indirect_branch("keep")))
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-2.c b/gcc/testsuite/gcc.target/i386/ret-thunk-2.c
new file mode 100644
index 000000000000..c6659e3ad093
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-2.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline" } */
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-3.c b/gcc/testsuite/gcc.target/i386/ret-thunk-3.c
new file mode 100644
index 000000000000..0f7f388f4590
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-3.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-extern" } */
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-4.c b/gcc/testsuite/gcc.target/i386/ret-thunk-4.c
new file mode 100644
index 000000000000..9ae37e835a02
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-4.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-5.c b/gcc/testsuite/gcc.target/i386/ret-thunk-5.c
new file mode 100644
index 000000000000..4bd0d2a27bc0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-5.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+extern void foo (void) __attribute__ ((function_return("thunk")));
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-6.c b/gcc/testsuite/gcc.target/i386/ret-thunk-6.c
new file mode 100644
index 000000000000..053841f6f7d9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-6.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+__attribute__ ((function_return("thunk-inline")))
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-7.c b/gcc/testsuite/gcc.target/i386/ret-thunk-7.c
new file mode 100644
index 000000000000..262e6780112f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-7.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+__attribute__ ((function_return("thunk-extern")))
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-8.c b/gcc/testsuite/gcc.target/i386/ret-thunk-8.c
new file mode 100644
index 000000000000..c1658e966735
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-8.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline" } */
+
+extern void foo (void) __attribute__ ((function_return("keep")));
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-9.c b/gcc/testsuite/gcc.target/i386/ret-thunk-9.c
new file mode 100644
index 000000000000..fa24a1f7365f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-9.c
@@ -0,0 +1,24 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times {\tpause} 2 { target { x32 } } } } */
+/* { dg-final { scan-assembler-times {\tlfence} 2 { target { x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } } } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */