ANDN is non-destructive, so use "r" instead of "0" for its operand 1 constraint.
2022-07-01 Uroš Bizjak <ubiz...@gmail.com> 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"