* [PATCH] Fix PR56150
@ 2013-01-31 8:52 Richard Biener
0 siblings, 0 replies; only message in thread
From: Richard Biener @ 2013-01-31 8:52 UTC (permalink / raw)
To: gcc-patches
This fixes PR56150 - mixed store/loads are not equal.
Bootstrapped and tested on x86_64-unknown-linux-gnu, applied to trunk.
Richard.
2013-01-30 Richard Biener <rguenther@suse.de>
PR tree-optimization/56150
* tree-ssa-tail-merge.c (gimple_equal_p): Properly handle
mixed store non-store stmts.
* gcc.dg/torture/pr56150.c: New testcase.
Index: gcc/tree-ssa-tail-merge.c
===================================================================
*** gcc/tree-ssa-tail-merge.c (revision 195574)
--- gcc/tree-ssa-tail-merge.c (working copy)
*************** gimple_equal_p (same_succ same_succ, gim
*** 1119,1135 ****
case GIMPLE_ASSIGN:
lhs1 = gimple_get_lhs (s1);
lhs2 = gimple_get_lhs (s2);
! if (gimple_vdef (s1))
! {
! if (vn_valueize (gimple_vdef (s1)) != vn_valueize (gimple_vdef (s2)))
! return false;
! if (TREE_CODE (lhs1) != SSA_NAME
! && TREE_CODE (lhs2) != SSA_NAME)
! return true;
! }
! return (TREE_CODE (lhs1) == SSA_NAME
! && TREE_CODE (lhs2) == SSA_NAME
! && vn_valueize (lhs1) == vn_valueize (lhs2));
case GIMPLE_COND:
t1 = gimple_cond_lhs (s1);
--- 1119,1132 ----
case GIMPLE_ASSIGN:
lhs1 = gimple_get_lhs (s1);
lhs2 = gimple_get_lhs (s2);
! if (TREE_CODE (lhs1) != SSA_NAME
! && TREE_CODE (lhs2) != SSA_NAME)
! return (vn_valueize (gimple_vdef (s1))
! == vn_valueize (gimple_vdef (s2)));
! else if (TREE_CODE (lhs1) == SSA_NAME
! && TREE_CODE (lhs2) == SSA_NAME)
! return vn_valueize (lhs1) == vn_valueize (lhs2);
! return false;
case GIMPLE_COND:
t1 = gimple_cond_lhs (s1);
Index: gcc/testsuite/gcc.dg/torture/pr56150.c
===================================================================
*** gcc/testsuite/gcc.dg/torture/pr56150.c (revision 0)
--- gcc/testsuite/gcc.dg/torture/pr56150.c (working copy)
***************
*** 0 ****
--- 1,17 ----
+ /* { dg-do compile } */
+
+ struct {
+ int f4;
+ } g1;
+
+ long g2;
+
+ volatile long g3;
+
+ void func_1 ()
+ {
+ if (g2)
+ g1 = g1;
+ else
+ g3;
+ }
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2013-01-31 8:52 [PATCH] Fix PR56150 Richard Biener
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