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| author | Richard Biener <rguenther@suse.de> | 2015-05-27 14:20:48 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-05-27 14:20:48 +0000 |
| commit | f3ae4add6c51c6cfeb40cb26bb52f6bdfa3c4520 (patch) | |
| tree | 7afffb21e685e332148aeeadaaea55d6ba1d8d54 /gcc/tree-data-ref.c | |
| parent | 70660539ce8d6bc1c9b3cb39e26fc55b89d6ec6a (diff) | |
| download | gcc-f3ae4add6c51c6cfeb40cb26bb52f6bdfa3c4520.zip gcc-f3ae4add6c51c6cfeb40cb26bb52f6bdfa3c4520.tar.gz gcc-f3ae4add6c51c6cfeb40cb26bb52f6bdfa3c4520.tar.bz2 | |
re PR tree-optimization/66272 (wrong code at -O3 on x86_64-linux-gnu)
2015-05-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/66272
Revert parts of
2014-08-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/62031
* tree-data-ref.c (dr_analyze_indices): Do not set
DR_UNCONSTRAINED_BASE.
(dr_may_alias_p): All indirect accesses have to go the
formerly DR_UNCONSTRAINED_BASE path.
* tree-data-ref.h (struct indices): Remove
unconstrained_base member.
(DR_UNCONSTRAINED_BASE): Remove.
* gcc.dg/torture/pr66272.c: New testcase.
From-SVN: r223759
Diffstat (limited to 'gcc/tree-data-ref.c')
| -rw-r--r-- | gcc/tree-data-ref.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c index 505d63b..368d3df 100644 --- a/gcc/tree-data-ref.c +++ b/gcc/tree-data-ref.c @@ -1036,6 +1036,7 @@ dr_analyze_indices (struct data_reference *dr, loop_p nest, loop_p loop) base, memoff); MR_DEPENDENCE_CLIQUE (ref) = MR_DEPENDENCE_CLIQUE (old); MR_DEPENDENCE_BASE (ref) = MR_DEPENDENCE_BASE (old); + DR_UNCONSTRAINED_BASE (dr) = true; access_fns.safe_push (access_fn); } } @@ -1453,7 +1454,8 @@ dr_may_alias_p (const struct data_reference *a, const struct data_reference *b, offset/overlap based analysis but have to rely on points-to information only. */ if (TREE_CODE (addr_a) == MEM_REF - && TREE_CODE (TREE_OPERAND (addr_a, 0)) == SSA_NAME) + && (DR_UNCONSTRAINED_BASE (a) + || TREE_CODE (TREE_OPERAND (addr_a, 0)) == SSA_NAME)) { /* For true dependences we can apply TBAA. */ if (flag_strict_aliasing @@ -1469,7 +1471,8 @@ dr_may_alias_p (const struct data_reference *a, const struct data_reference *b, build_fold_addr_expr (addr_b)); } else if (TREE_CODE (addr_b) == MEM_REF - && TREE_CODE (TREE_OPERAND (addr_b, 0)) == SSA_NAME) + && (DR_UNCONSTRAINED_BASE (b) + || TREE_CODE (TREE_OPERAND (addr_b, 0)) == SSA_NAME)) { /* For true dependences we can apply TBAA. */ if (flag_strict_aliasing |