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| author | Richard Guenther <rguenther@suse.de> | 2008-02-15 15:24:19 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2008-02-15 15:24:19 +0000 |
| commit | 2e58df6ecf3d060e3a8bd95f898baf89f733e1f5 (patch) | |
| tree | 84bac3426747a9ff72e762dc1ff06bfc9e4f61f7 /gcc/tree-ssa-forwprop.c | |
| parent | 508515b0277f2adadc610acb2dd14f769ba992ff (diff) | |
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re PR tree-optimization/35164 (Unable to coalesce ab SSA_NAMEs)
2008-02-15 Richard Guenther <rguenther@suse.de>
Zdenek Dvorak <ook@ucw.cz>
PR tree-optimization/35164
* tree-flow.h (stmt_references_abnormal_ssa_name): Declare.
* tree-dfa.c (stmt_references_abnormal_ssa_name): New function.
* tree-ssa-forwprop.c (tree_ssa_forward_propagate_single_use_vars):
Only propagate addresses which do not have abnormal SSA_NAMEs
in their operands.
* g++.dg/torture/pr35164-1.C: New testcase.
* g++.dg/torture/pr35164-2.C: Likewise.
Co-Authored-By: Zdenek Dvorak <ook@ucw.cz>
From-SVN: r132345
Diffstat (limited to 'gcc/tree-ssa-forwprop.c')
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index 2da17c8..91bd617 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -968,7 +968,8 @@ tree_ssa_forward_propagate_single_use_vars (void) && types_compatible_p (TREE_TYPE (TREE_TYPE (TREE_OPERAND (rhs, 0))), TREE_TYPE (TREE_TYPE (rhs))))) { - if (forward_propagate_addr_expr (lhs, rhs)) + if (!stmt_references_abnormal_ssa_name (stmt) + && forward_propagate_addr_expr (lhs, rhs)) { release_defs (stmt); todoflags |= TODO_remove_unused_locals; |