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| author | Richard Biener <rguenther@suse.de> | 2015-09-24 07:34:47 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-09-24 07:34:47 +0000 |
| commit | 0a28fdcaf70aee998705bf5878f4c508d9641e31 (patch) | |
| tree | 82d9ad8e32a41babe62af07db1041c917bf9129d /gcc/tree-ssa-structalias.c | |
| parent | 761d6f4eecc754a409a71b7c1e4853c91ccbec8e (diff) | |
| download | gcc-0a28fdcaf70aee998705bf5878f4c508d9641e31.zip gcc-0a28fdcaf70aee998705bf5878f4c508d9641e31.tar.gz gcc-0a28fdcaf70aee998705bf5878f4c508d9641e31.tar.bz2 | |
re PR c/48885 (missed optimization with restrict qualifier?)
2015-09-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/48885
* tree-ssa-structalias.c (visit_loadstore): Handle default defs
as not including any restrict tags from other pointers.
* gcc.dg/tree-ssa/restrict-6.c: New testcase.
From-SVN: r228073
Diffstat (limited to 'gcc/tree-ssa-structalias.c')
| -rw-r--r-- | gcc/tree-ssa-structalias.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c index 8d81bd4..8d86dcb 100644 --- a/gcc/tree-ssa-structalias.c +++ b/gcc/tree-ssa-structalias.c @@ -6952,10 +6952,11 @@ visit_loadstore (gimple *, tree base, tree ref, void *clique_) || TREE_CODE (base) == TARGET_MEM_REF) { tree ptr = TREE_OPERAND (base, 0); - if (TREE_CODE (ptr) == SSA_NAME) + if (TREE_CODE (ptr) == SSA_NAME + && ! SSA_NAME_IS_DEFAULT_DEF (ptr)) { /* ??? We need to make sure 'ptr' doesn't include any of - the restrict tags in its points-to set. */ + the restrict tags we added bases for in its points-to set. */ return false; } |