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| author | Diego Novillo <dnovillo@redhat.com> | 2004-09-16 22:16:56 +0000 |
|---|---|---|
| committer | Diego Novillo <dnovillo@gcc.gnu.org> | 2004-09-16 18:16:56 -0400 |
| commit | 1800536a055eefcd5877c11cdea3fa25d692589e (patch) | |
| tree | 7260cac5c75003316b7d9996ef8b23d0b770c64e /gcc/tree-ssa-operands.c | |
| parent | 42759f1ea05f7893f3bee4adbab74becf1a9f764 (diff) | |
| download | gcc-1800536a055eefcd5877c11cdea3fa25d692589e.zip gcc-1800536a055eefcd5877c11cdea3fa25d692589e.tar.gz gcc-1800536a055eefcd5877c11cdea3fa25d692589e.tar.bz2 | |
tree-ssa-operands.c (add_call_clobber_ops): Make read-only test apply only to TREE_STATIC and DECL_EXTERNAL.
* tree-ssa-operands.c (add_call_clobber_ops): Make read-only
test apply only to TREE_STATIC and DECL_EXTERNAL.
From-SVN: r87615
Diffstat (limited to 'gcc/tree-ssa-operands.c')
| -rw-r--r-- | gcc/tree-ssa-operands.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/tree-ssa-operands.c b/gcc/tree-ssa-operands.c index 8daadc7..a007b50 100644 --- a/gcc/tree-ssa-operands.c +++ b/gcc/tree-ssa-operands.c @@ -1620,9 +1620,15 @@ add_call_clobber_ops (tree stmt, tree callee) with a module static or we may not. So we still must look anywhere else we can (such as the TREE_READONLY) to get better info. */ + /* If VAR is read-only, don't add a V_MAY_DEF, just a - VUSE operand. */ - else if (TREE_READONLY (var)) + VUSE operand. FIXME, this is quirky. TREE_READONLY + by itself is not enough here. We can only decide + that the call will not affect VAR if all these + conditions are met. One would think that + TREE_READONLY should be sufficient. */ + else if (TREE_READONLY (var) + && (TREE_STATIC (var) || DECL_EXTERNAL (var))) add_stmt_operand (&var, stmt, opf_none); else add_stmt_operand (&var, stmt, opf_is_def); |