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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
; RUN: llc < %s -mtriple=riscv64 | FileCheck %s
; The sub nuw produces poison if the input is not 0 or 1. We must insert a
; freeze before converting the sub to AND so that we don't propagate poison.
define i64 @foo(i64 %1) {
; CHECK-LABEL: foo:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: li a1, 1
; CHECK-NEXT: sub a1, a1, a0
; CHECK-NEXT: sltiu a0, a0, 2
; CHECK-NEXT: xori a1, a1, 1
; CHECK-NEXT: neg a0, a0
; CHECK-NEXT: and a0, a0, a1
; CHECK-NEXT: ret
entry:
%.urem.i = sub nuw i64 1, %1
%.cmp.i = icmp ugt i64 %1, 1
%2 = xor i64 %.urem.i, 1
%3 = select i1 %.cmp.i, i64 0, i64 %2
ret i64 %3
}
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