This fixes PR52459, we re-use VN reference to encode calls but
we are not interested in restricting call insertions in
PREs inhibit_phi_insertion (we at most have pure calls).
Boostrapped and tested on x86_64-unknown-linux-gnu, applied to trunk.
Richard.
2012-03-21 Richard Guenther <rguent...@suse.de>
PR tree-optimization/52459
* tree-ssa-pre.c (inhibit_phi_insertion): Do not inhibit
PHI insertion for calls.
Index: gcc/tree-ssa-pre.c
===================================================================
*** gcc/tree-ssa-pre.c (revision 185597)
--- gcc/tree-ssa-pre.c (working copy)
*************** inhibit_phi_insertion (basic_block bb, p
*** 3242,3247 ****
--- 3242,3251 ----
{
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)
