diff options
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/i386.md | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index e7c5490..5e0a980 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -11011,6 +11011,19 @@ [(set_attr "type" "negnot") (set_attr "mode" "<MODE>")]) +;; Optimize *negsi_1 followed by *cmpsi_ccno_1 (PR target/91384) +(define_peephole2 + [(set (match_operand:SWI 0 "general_reg_operand") + (match_operand:SWI 1 "general_reg_operand")) + (parallel [(set (match_dup 0) (neg:SWI (match_dup 0))) + (clobber (reg:CC FLAGS_REG))]) + (set (reg:CCZ FLAGS_REG) (compare:CCZ (match_dup 1) (const_int 0)))] + "" + [(set (match_dup 0) (match_dup 1)) + (parallel [(set (reg:CCZ FLAGS_REG) + (compare:CCZ (neg:SWI (match_dup 0)) (const_int 0))) + (set (match_dup 0) (neg:SWI (match_dup 0)))])]) + ;; Special expand pattern to handle integer mode abs (define_expand "abs<mode>2" |