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| author | Zdenek Dvorak <dvorakz@suse.cz> | 2004-11-14 19:04:25 +0100 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2004-11-14 18:04:25 +0000 |
| commit | 9beeb4ee4c1bf42a2d3a66d75d250cf20c9c1f9f (patch) | |
| tree | 4342616d30f20c349279f331a6f1ad5af6c0e53b /gcc/tree-ssa.c | |
| parent | 3021a627c59f88450a6c785d5b0d61f390762445 (diff) | |
| download | gcc-9beeb4ee4c1bf42a2d3a66d75d250cf20c9c1f9f.zip gcc-9beeb4ee4c1bf42a2d3a66d75d250cf20c9c1f9f.tar.gz gcc-9beeb4ee4c1bf42a2d3a66d75d250cf20c9c1f9f.tar.bz2 | |
re PR tree-optimization/18431 (Code for arrays and pointers are not the same)
PR tree-optimization/18431
* tree-flow.h (stmt_references_memory_p): Declare.
* tree-ssa-loop-im.c (stmt_cost): Use stmt_references_memory_p.
* tree-ssa.c (stmt_references_memory_p): New function.
From-SVN: r90624
Diffstat (limited to 'gcc/tree-ssa.c')
| -rw-r--r-- | gcc/tree-ssa.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/tree-ssa.c b/gcc/tree-ssa.c index d0419b7..4cb8cc2 100644 --- a/gcc/tree-ssa.c +++ b/gcc/tree-ssa.c @@ -902,6 +902,23 @@ tree_ssa_useless_type_conversion (tree expr) return false; } +/* Returns true if statement STMT may read memory. */ + +bool +stmt_references_memory_p (tree stmt) +{ + stmt_ann_t ann; + + get_stmt_operands (stmt); + ann = stmt_ann (stmt); + + if (ann->has_volatile_ops) + return true; + + return (NUM_VUSES (VUSE_OPS (ann)) > 0 + || NUM_V_MAY_DEFS (V_MAY_DEF_OPS (ann)) > 0 + || NUM_V_MUST_DEFS (V_MUST_DEF_OPS (ann)) > 0); +} /* Internal helper for walk_use_def_chains. VAR, FN and DATA are as described in walk_use_def_chains. |