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| author | Richard Henderson <rth@redhat.com> | 2004-09-28 19:50:47 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2004-09-28 19:50:47 -0700 |
| commit | aa24864c2389a86dbba4e0a04c3eb0a3c14d10d9 (patch) | |
| tree | 6ec2f8d5a10435c23e27413403888abc84af50b0 /gcc/tree-ssa-ccp.c | |
| parent | e376fe584282938a72a287a467a408ec4619e5fb (diff) | |
| download | gcc-aa24864c2389a86dbba4e0a04c3eb0a3c14d10d9.zip gcc-aa24864c2389a86dbba4e0a04c3eb0a3c14d10d9.tar.gz gcc-aa24864c2389a86dbba4e0a04c3eb0a3c14d10d9.tar.bz2 | |
re PR tree-optimization/15089 (local register variable with a specified register is bad)
PR 15089
* tree-ssa-copy.c (may_propagate_copy_into_asm): New.
* tree-flow.h (may_propagate_copy_into_asm): Declare.
* tree-ssa-ccp.c (replace_uses_in): Use it.
* tree-ssa-dom.c (cprop_operand): Likewise.
From-SVN: r88269
Diffstat (limited to 'gcc/tree-ssa-ccp.c')
| -rw-r--r-- | gcc/tree-ssa-ccp.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c index 144a8bf..d3ad956 100644 --- a/gcc/tree-ssa-ccp.c +++ b/gcc/tree-ssa-ccp.c @@ -454,16 +454,21 @@ replace_uses_in (tree stmt, bool *replaced_addresses_p) FOR_EACH_SSA_USE_OPERAND (use, stmt, iter, SSA_OP_USE) { - value *val = get_value (USE_FROM_PTR (use)); + tree tuse = USE_FROM_PTR (use); + value *val = get_value (tuse); - if (val->lattice_val == CONSTANT) - { - SET_USE (use, val->const_val); - replaced = true; - if (POINTER_TYPE_P (TREE_TYPE (USE_FROM_PTR (use))) - && replaced_addresses_p) - *replaced_addresses_p = true; - } + if (val->lattice_val != CONSTANT) + continue; + + if (TREE_CODE (stmt) == ASM_EXPR + && !may_propagate_copy_into_asm (tuse)) + continue; + + SET_USE (use, val->const_val); + + replaced = true; + if (POINTER_TYPE_P (TREE_TYPE (tuse)) && replaced_addresses_p) + *replaced_addresses_p = true; } return replaced; |