diff options
Diffstat (limited to 'gcc-4.9/gcc/regcprop.c')
| -rw-r--r-- | gcc-4.9/gcc/regcprop.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc-4.9/gcc/regcprop.c b/gcc-4.9/gcc/regcprop.c index 5b63cb74d..a1c7b9ddb 100644 --- a/gcc-4.9/gcc/regcprop.c +++ b/gcc-4.9/gcc/regcprop.c @@ -1040,7 +1040,17 @@ copyprop_hardreg_forward_1 (basic_block bb, struct value_data *vd) but instead among CLOBBERs on the CALL_INSN, we could wrongly assume the value in it is still live. */ if (ksvd.ignore_set_reg) - note_stores (PATTERN (insn), kill_clobbered_value, vd); + { + note_stores (PATTERN (insn), kill_clobbered_value, vd); + for (exp = CALL_INSN_FUNCTION_USAGE (insn); + exp; + exp = XEXP (exp, 1)) + { + rtx x = XEXP (exp, 0); + if (GET_CODE (x) == CLOBBER) + kill_value (SET_DEST (x), vd); + } + } } /* Notice stores. */ |