File: partialord-ule.ll

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -O1 -S < %s | FileCheck %s

; This is a very convoluted way to write an icmp ule, which comes about by
; matching against a three-way comparison result.
define i1 @ule(i32 %a, i32 %b) {
; CHECK-LABEL: @ule(
; CHECK-NEXT:  start:
; CHECK-NEXT:    [[SWITCH_SELECTCMP1:%.*]] = icmp ule i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i1 [[SWITCH_SELECTCMP1]]
;
start:
  %cmp1 = icmp eq i32 %a, %b
  %cmp2 = icmp ult i32 %a, %b
  %cmp3 = icmp ne i32 %a, %b
  %zext = zext i1 %cmp3 to i64
  %sel1 = select i1 %cmp2, i64 -1, i64 %zext
  %sel2 = select i1 %cmp1, i64 0, i64 %sel1
  switch i64 %sel2, label %exit [
  i64 -1, label %bb
  i64 0, label %bb
  ]

bb:
  br label %exit

exit:
  %res = phi i1 [ true, %bb ], [ false, %start ]
  ret i1 %res
}