ANDN is non-destructive, so use "r" instead of "0" for its operand 1 constraint.
2022-07-01 Uroš Bizjak <[email protected]>
gcc/ChangeLog:
* config/i386/i386.md (*andn<mode>3_doubleword_bmi):
Use "r" constraint for operand 1.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Pushed to master.
Uros.
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 352a21c585c..20c3b9a4122 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -10407,7 +10407,7 @@ (define_split
(define_insn_and_split "*andn<mode>3_doubleword_bmi"
[(set (match_operand:<DWI> 0 "register_operand" "=r")
(and:<DWI>
- (not:<DWI> (match_operand:<DWI> 1 "register_operand" "0"))
+ (not:<DWI> (match_operand:<DWI> 1 "register_operand" "r"))
(match_operand:<DWI> 2 "nonimmediate_operand" "ro")))
(clobber (reg:CC FLAGS_REG))]
"TARGET_BMI"
