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Diffstat (limited to 'gcc/tree-ssa-dce.cc')
| -rw-r--r-- | gcc/tree-ssa-dce.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/tree-ssa-dce.cc b/gcc/tree-ssa-dce.cc index 2067b711d5b..4b7b664867d 100644 --- a/gcc/tree-ssa-dce.cc +++ b/gcc/tree-ssa-dce.cc @@ -2060,6 +2060,13 @@ simple_dce_from_worklist (bitmap worklist) if (gimple_has_side_effects (t)) continue; + /* The defining statement needs to be defining only this name. + ASM is the only statement that can define more than one + (non-virtual) name. */ + if (is_a<gasm *>(t) + && !single_ssa_def_operand (t, SSA_OP_DEF)) + continue; + /* Don't remove statements that are needed for non-call eh to work. */ if (stmt_unremovable_because_of_non_call_eh_p (cfun, t)) |