AArch64: add support for ARM64 iOS versions of compiler-rt.

Just a dummy directory and a few sane choices in the Darwin SDK.

rdar://problem/18575597

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@219323 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 37 insertions, 1 deletions

diff --git a/lib/builtins/Makefile.mk b/lib/builtins/Makefile.mk
index 4dbadd0bf..00e2f53fc 100644
--- a/lib/builtins/Makefile.mk
+++ b/lib/builtins/Makefile.mk
@@ -13,6 +13,9 @@ SubDirs :=
 # Add arch specific optimized implementations.
 SubDirs += i386 ppc x86_64 arm armv6m
 
+# Add ARM64 dir.
+SubDirs += arm64
+
 # Define the variables for this specific directory.
 Sources := $(foreach file,$(wildcard $(Dir)/*.c),$(notdir $(file)))
 ObjNames := $(Sources:%.c=%.o)
diff --git a/lib/builtins/arm64/Makefile.mk b/lib/builtins/arm64/Makefile.mk
new file mode 100644
index 000000000..7f7e38661
--- /dev/null
+++ b/lib/builtins/arm64/Makefile.mk
@@ -0,0 +1,20 @@
+#===- lib/builtins/arm64/Makefile.mk -----------------------*- Makefile -*--===#
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+#===------------------------------------------------------------------------===#
+
+ModuleName := builtins
+SubDirs := 
+OnlyArchs := arm64 
+
+AsmSources := $(foreach file,$(wildcard $(Dir)/*.S),$(notdir $(file)))
+Sources := $(foreach file,$(wildcard $(Dir)/*.c),$(notdir $(file)))
+ObjNames := $(Sources:%.c=%.o) $(AsmSources:%.S=%.o)
+Implementation := Optimized
+
+# FIXME: use automatic dependencies?
+Dependencies := $(wildcard lib/*.h $(Dir)/*.h)
diff --git a/lib/builtins/arm64/dummy.c b/lib/builtins/arm64/dummy.c
new file mode 100644
index 000000000..76bec3048
--- /dev/null
+++ b/lib/builtins/arm64/dummy.c
@@ -0,0 +1,13 @@
+/* ===---------- dummy.c - Implements dummy function, for bringup -----------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+static void dummy(void) __attribute__((used));
+
+static void dummy(void) {}
diff --git a/lib/builtins/gcc_personality_v0.c b/lib/builtins/gcc_personality_v0.c
index 91a77f444..869f4178e 100644
--- a/lib/builtins/gcc_personality_v0.c
+++ b/lib/builtins/gcc_personality_v0.c
@@ -180,7 +180,7 @@ static uintptr_t readEncodedPointer(const uint8_t** data, uint8_t encoding)
  * on each frame as the stack is unwound during a C++ exception
  * throw through a C function compiled with -fexceptions.
  */
-#if __arm__
+#if __USING_SJLJ_EXCEPTIONS__
 // the setjump-longjump based exceptions personality routine has a different name
 COMPILER_RT_ABI _Unwind_Reason_Code
 __gcc_personality_sj0(int version, _Unwind_Action actions,