tree-optimization/93439 move clique bookkeeping to OMP expansion

Autopar was doing clique bookkeeping too early when creating destination
functions but then later introducing new cliques via versioning loops.
The following moves the bookkeeping to the actual outlining process.

2020-01-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/93439
	* tree-parloops.c (create_loop_fn): Move clique bookkeeping...
	* tree-cfg.c (move_sese_region_to_fn): ... here.
	(verify_types_in_gimple_reference): Verify used cliques are
	tracked.

	* gfortran.dg/graphite/pr93439.f90: New testcase.

5 files changed, 51 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2a000e5f31f..ed3db3e003e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2020-01-28  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/93439
+	* tree-parloops.c (create_loop_fn): Move clique bookkeeping...
+	* tree-cfg.c (move_sese_region_to_fn): ... here.
+	(verify_types_in_gimple_reference): Verify used cliques are
+	tracked.
+
 2020-01-28  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/91399
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c08bc22b5a0..dfb7a0fb5b4 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-01-28  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/93439
+	* gfortran.dg/graphite/pr93439.f90: New testcase.
+
 2020-01-28  Sahahb Vahedi  <shahab@synopsys.com>
 
 	* gcc.target/arc/code-density-flag.c: New test
diff --git a/gcc/testsuite/gfortran.dg/graphite/pr93439.f90 b/gcc/testsuite/gfortran.dg/graphite/pr93439.f90
new file mode 100644
index 00000000000..e815ab929e1
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/graphite/pr93439.f90
@@ -0,0 +1,21 @@
+! { dg-additional-options "-O2 -floop-parallelize-all -floop-unroll-and-jam -ftree-parallelize-loops=2" }
+
+module ai
+  integer, parameter :: dp = 8
+contains
+  subroutine qu(ja, nq, en, p5)
+    real(kind = dp) :: nq(ja), en(ja), p5(ja)
+    call tl(ja, nq, en, p5)
+  end subroutine qu
+
+  subroutine tl(ja, nq, en, p5)
+    real(kind = dp) :: nq(9), en(9 * ja), p5(3 * ja)
+    do mc = 1, ja
+       do mb = 1, 9
+          do ma = 1, 3
+             p5((mc - 1) * 3 + ma) = p5((mc - 1) * 3 + ma) - 1
+          end do
+       end do
+    end do
+  end subroutine tl
+end module ai
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index fd69b366bf4..f7b817d94e6 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -3226,6 +3226,13 @@ verify_types_in_gimple_reference (tree expr, bool require_lvalue)
 	  debug_generic_stmt (expr);
 	  return true;
 	}
+      if (MR_DEPENDENCE_CLIQUE (expr) != 0
+	  && MR_DEPENDENCE_CLIQUE (expr) > cfun->last_clique)
+	{
+	  error ("invalid clique in %qs", code_name);
+	  debug_generic_stmt (expr);
+	  return true;
+	}
     }
   else if (TREE_CODE (expr) == TARGET_MEM_REF)
     {
@@ -3245,6 +3252,13 @@ verify_types_in_gimple_reference (tree expr, bool require_lvalue)
 	  debug_generic_stmt (expr);
 	  return true;
 	}
+      if (MR_DEPENDENCE_CLIQUE (expr) != 0
+	  && MR_DEPENDENCE_CLIQUE (expr) > cfun->last_clique)
+	{
+	  error ("invalid clique in %qs", code_name);
+	  debug_generic_stmt (expr);
+	  return true;
+	}
     }
   else if (TREE_CODE (expr) == INDIRECT_REF)
     {
@@ -7744,6 +7758,9 @@ move_sese_region_to_fn (struct function *dest_cfun, basic_block entry_bb,
       after = bb;
     }
 
+  /* Adjust the maximum clique used.  */
+  dest_cfun->last_clique = saved_cfun->last_clique;
+
   loop->aux = NULL;
   loop0->aux = NULL;
   /* Loop sizes are no longer correct, fix them up.  */
diff --git a/gcc/tree-parloops.c b/gcc/tree-parloops.c
index d315b797a66..d9250d36c72 100644
--- a/gcc/tree-parloops.c
+++ b/gcc/tree-parloops.c
@@ -2202,7 +2202,6 @@ create_loop_fn (location_t loc)
   DECL_ARGUMENTS (decl) = t;
 
   allocate_struct_function (decl, false);
-  DECL_STRUCT_FUNCTION (decl)->last_clique = act_cfun->last_clique;
 
   /* The call to allocate_struct_function clobbers CFUN, so we need to restore
      it.  */