diff options
Diffstat (limited to 'gcc-4.9/gcc/config/s390/s390.md')
| -rw-r--r-- | gcc-4.9/gcc/config/s390/s390.md | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/s390/s390.md b/gcc-4.9/gcc/config/s390/s390.md index 7d9d1ad7e..b17c1fac8 100644 --- a/gcc-4.9/gcc/config/s390/s390.md +++ b/gcc-4.9/gcc/config/s390/s390.md @@ -7001,6 +7001,21 @@ "" "s390_expand_logical_operator (XOR, <MODE>mode, operands); DONE;") +; Combine replaces (xor (x) (const_int -1)) with (not (x)) when doing +; simplifications. So its better to have something matching. +(define_split + [(set (match_operand:INT 0 "nonimmediate_operand" "") + (not:INT (match_operand:INT 1 "nonimmediate_operand" "")))] + "" + [(parallel + [(set (match_dup 0) (xor:INT (match_dup 1) (match_dup 2))) + (clobber (reg:CC CC_REGNUM))])] +{ + operands[2] = constm1_rtx; + if (!s390_logical_operator_ok_p (operands)) + FAIL; +}) + ; ; xordi3 instruction pattern(s). ; |