1*909ab0e0SCraig Topper; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4 2*909ab0e0SCraig Topper; RUN: llc < %s -mtriple=riscv64 | FileCheck %s 3*909ab0e0SCraig Topper 4*909ab0e0SCraig Topper; The sub nuw produces poison if the input is not 0 or 1. We must insert a 5*909ab0e0SCraig Topper; freeze before converting the sub to AND so that we don't propagate poison. 6*909ab0e0SCraig Topperdefine i64 @foo(i64 %1) { 7*909ab0e0SCraig Topper; CHECK-LABEL: foo: 8*909ab0e0SCraig Topper; CHECK: # %bb.0: # %entry 9*909ab0e0SCraig Topper; CHECK-NEXT: li a1, 1 10*909ab0e0SCraig Topper; CHECK-NEXT: sub a1, a1, a0 11*909ab0e0SCraig Topper; CHECK-NEXT: sltiu a0, a0, 2 12*909ab0e0SCraig Topper; CHECK-NEXT: xori a1, a1, 1 13*909ab0e0SCraig Topper; CHECK-NEXT: neg a0, a0 14*909ab0e0SCraig Topper; CHECK-NEXT: and a0, a0, a1 15*909ab0e0SCraig Topper; CHECK-NEXT: ret 16*909ab0e0SCraig Topperentry: 17*909ab0e0SCraig Topper %.urem.i = sub nuw i64 1, %1 18*909ab0e0SCraig Topper %.cmp.i = icmp ugt i64 %1, 1 19*909ab0e0SCraig Topper %2 = xor i64 %.urem.i, 1 20*909ab0e0SCraig Topper %3 = select i1 %.cmp.i, i64 0, i64 %2 21*909ab0e0SCraig Topper ret i64 %3 22*909ab0e0SCraig Topper} 23