| ; 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 |
| } |
