test/Transforms/InstCombine/freeze.ll

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

define i32 @fold(i32 %x) {
; CHECK-LABEL: @fold(
; CHECK-NEXT:    [[Y:%.*]] = freeze i32 [[X:%.*]]
; CHECK-NEXT:    ret i32 [[Y]]
;
  %y = freeze i32 %x
  %z = freeze i32 %y
  ret i32 %z
}

define i32 @make_const() {
; CHECK-LABEL: @make_const(
; CHECK-NEXT:    ret i32 10
;
  %x = freeze i32 10
  ret i32 %x
}

define i32 @and_freeze_undef(i32 %x) {
; CHECK-LABEL: @and_freeze_undef(
; CHECK-NEXT:    ret i32 0
;
  %f = freeze i32 undef
  %res = and i32 %x, %f
  ret i32 %res
}

declare void @use_i32(i32)

define i32 @and_freeze_undef_multipleuses(i32 %x) {
; CHECK-LABEL: @and_freeze_undef_multipleuses(
; CHECK-NEXT:    call void @use_i32(i32 0)
; CHECK-NEXT:    ret i32 0
;
  %f = freeze i32 undef
  %res = and i32 %x, %f
  call void @use_i32(i32 %f)
  ret i32 %res
}

define i32 @or_freeze_undef(i32 %x) {
; CHECK-LABEL: @or_freeze_undef(
; CHECK-NEXT:    ret i32 -1
;
  %f = freeze i32 undef
  %res = or i32 %x, %f
  ret i32 %res
}

define i32 @or_freeze_undef_multipleuses(i32 %x) {
; CHECK-LABEL: @or_freeze_undef_multipleuses(
; CHECK-NEXT:    call void @use_i32(i32 0)
; CHECK-NEXT:    ret i32 [[X:%.*]]
;
  %f = freeze i32 undef
  %res = or i32 %x, %f
  call void @use_i32(i32 %f)
  ret i32 %res
}

declare void @use_i32_i1(i32, i1)

define void @or_select_multipleuses(i32 %x, i1 %y) {
; CHECK-LABEL: @or_select_multipleuses(
; CHECK-NEXT:    call void @use_i32_i1(i32 32, i1 [[Y:%.*]])
; CHECK-NEXT:    ret void
;
  %f = freeze i1 undef
  %a = select i1 %f, i32 %x, i32 32 ; prefers %f to be false
  %b = or i1 %f, %y ; prefers %f to be true
  call void @use_i32_i1(i32 %a, i1 %b)
  ret void
}

define void @or_select_multipleuses_logical(i32 %x, i1 %y) {
; CHECK-LABEL: @or_select_multipleuses_logical(
; CHECK-NEXT:    call void @use_i32_i1(i32 32, i1 [[Y:%.*]])
; CHECK-NEXT:    ret void
;
  %f = freeze i1 undef
  %a = select i1 %f, i32 %x, i32 32 ; prefers %f to be false
  %b = select i1 %f, i1 true, i1 %y ; prefers %f to be true
  call void @use_i32_i1(i32 %a, i1 %b)
  ret void
}