llvm/llvm/test/Transforms/InstCombine/pr98139.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=instcombine < %s | FileCheck %s

define i8 @pr98139(i16 %a, i16 %b, i1 %cond) {
; CHECK-LABEL: define i8 @pr98139(
; CHECK-SAME: i16 [[A:%.*]], i16 [[B:%.*]], i1 [[COND:%.*]]) {
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[COND]], i16 1, i16 254
; CHECK-NEXT:    [[COND1:%.*]] = icmp ne i16 [[B]], 0
; CHECK-NEXT:    [[MASK:%.*]] = and i16 [[A]], 255
; CHECK-NEXT:    [[COND2:%.*]] = icmp ne i16 [[MASK]], 255
; CHECK-NEXT:    [[COND3:%.*]] = or i1 [[COND1]], [[COND2]]
; CHECK-NEXT:    [[SEL2:%.*]] = select i1 [[COND3]], i16 [[SEL]], i16 255
; CHECK-NEXT:    [[SUB:%.*]] = sub i16 [[SEL2]], [[A]]
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i16 [[SUB]] to i8
; CHECK-NEXT:    ret i8 [[TRUNC]]
;
  %sel = select i1 %cond, i16 1, i16 254
  %cond1 = icmp ne i16 %b, 0
  %mask = and i16 %a, 255
  %cond2 = icmp ne i16 %mask, 255
  %cond3 = or i1 %cond1, %cond2
  %sel2 = select i1 %cond3, i16 %sel, i16 255
  %sub = sub i16 %sel2, %a
  %trunc = trunc i16 %sub to i8
  ret i8 %trunc
}