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Diffstat (limited to 'gcc/tree-ssa-dce.cc')
| -rw-r--r-- | gcc/tree-ssa-dce.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/tree-ssa-dce.cc b/gcc/tree-ssa-dce.cc index d77e541..2949957 100644 --- a/gcc/tree-ssa-dce.cc +++ b/gcc/tree-ssa-dce.cc @@ -1481,6 +1481,14 @@ eliminate_unnecessary_stmts (bool aggressive) case IFN_MUL_OVERFLOW: maybe_optimize_arith_overflow (&gsi, MULT_EXPR); break; + case IFN_UADDC: + if (integer_zerop (gimple_call_arg (stmt, 2))) + maybe_optimize_arith_overflow (&gsi, PLUS_EXPR); + break; + case IFN_USUBC: + if (integer_zerop (gimple_call_arg (stmt, 2))) + maybe_optimize_arith_overflow (&gsi, MINUS_EXPR); + break; default: break; } |