re PR tree-optimization/52459 (PRE performs stupid inserts)

2012-03-22  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/52459
	* tree-ssa-pre.c (inhibit_phi_insertion): Do not inhibit
	PHI insertion for calls.

From-SVN: r185676

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3fce28fd668f6a593cd0ba3ab37d879c2473016b..0bcae9b1fcead7c0dc019402ad115e6602a496b1 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2012-03-22  Richard Guenther  <rguenther@suse.de>
+
+       PR tree-optimization/52459
+       * tree-ssa-pre.c (inhibit_phi_insertion): Do not inhibit
+       PHI insertion for calls.
+
 2012-03-21  Steven Bosscher  <steven@gcc.gnu.org>
 
        * cse.c (invalidate_from_sets_and_clobbers, try_back_substitute_reg,

diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c
index e5ec931b96fd5f663c9ec9984ea015721b3e108c..76df3c623c5b7a4770e92dd2c7323888361eb96f 100644 (file)
--- a/gcc/tree-ssa-pre.c
+++ b/gcc/tree-ssa-pre.c
@@ -3242,6 +3242,10 @@ inhibit_phi_insertion (basic_block bb, pre_expr expr)
     {
       switch (op->opcode)
        {
+       case CALL_EXPR:
+         /* Calls are not a problem.  */
+         return false;
+
        case ARRAY_REF:
        case ARRAY_RANGE_REF:
          if (TREE_CODE (op->op0) != SSA_NAME)