test/Transforms/InstCombine/invariant.group.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine,early-cse -earlycse-debug-hash -S < %s | FileCheck %s

define ptr @simplifyNullLaunder() {
; CHECK-LABEL: @simplifyNullLaunder(
; CHECK-NEXT:    ret ptr null
;
  %b2 = call ptr @llvm.launder.invariant.group.p0(ptr null)
  ret ptr %b2
}

define ptr @dontSimplifyNullLaunderNoNullOpt() #0 {
; CHECK-LABEL: @dontSimplifyNullLaunderNoNullOpt(
; CHECK-NEXT:    [[B2:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr null)
; CHECK-NEXT:    ret ptr [[B2]]
;
  %b2 = call ptr @llvm.launder.invariant.group.p0(ptr null)
  ret ptr %b2
}

define ptr addrspace(42) @dontsimplifyNullLaunderForDifferentAddrspace() {
; CHECK-LABEL: @dontsimplifyNullLaunderForDifferentAddrspace(
; CHECK-NEXT:    [[B2:%.*]] = call ptr addrspace(42) @llvm.launder.invariant.group.p42(ptr addrspace(42) null)
; CHECK-NEXT:    ret ptr addrspace(42) [[B2]]
;
  %b2 = call ptr addrspace(42) @llvm.launder.invariant.group.p42(ptr addrspace(42) null)
  ret ptr addrspace(42) %b2
}

define ptr @simplifyUndefLaunder() {
; CHECK-LABEL: @simplifyUndefLaunder(
; CHECK-NEXT:    ret ptr undef
;
  %b2 = call ptr @llvm.launder.invariant.group.p0(ptr undef)
  ret ptr %b2
}

define ptr addrspace(42) @simplifyUndefLaunder2() {
; CHECK-LABEL: @simplifyUndefLaunder2(
; CHECK-NEXT:    ret ptr addrspace(42) undef
;
  %b2 = call ptr addrspace(42) @llvm.launder.invariant.group.p42(ptr addrspace(42) undef)
  ret ptr addrspace(42) %b2
}

define ptr @simplifyNullStrip() {
; CHECK-LABEL: @simplifyNullStrip(
; CHECK-NEXT:    ret ptr null
;
  %b2 = call ptr @llvm.strip.invariant.group.p0(ptr null)
  ret ptr %b2
}

define ptr @dontSimplifyNullStripNonNullOpt() #0 {
; CHECK-LABEL: @dontSimplifyNullStripNonNullOpt(
; CHECK-NEXT:    [[B2:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr null)
; CHECK-NEXT:    ret ptr [[B2]]
;
  %b2 = call ptr @llvm.strip.invariant.group.p0(ptr null)
  ret ptr %b2
}

define ptr addrspace(42) @dontsimplifyNullStripForDifferentAddrspace() {
; CHECK-LABEL: @dontsimplifyNullStripForDifferentAddrspace(
; CHECK-NEXT:    [[B2:%.*]] = call ptr addrspace(42) @llvm.strip.invariant.group.p42(ptr addrspace(42) null)
; CHECK-NEXT:    ret ptr addrspace(42) [[B2]]
;
  %b2 = call ptr addrspace(42) @llvm.strip.invariant.group.p42(ptr addrspace(42) null)
  ret ptr addrspace(42) %b2
}

define ptr @simplifyUndefStrip() {
; CHECK-LABEL: @simplifyUndefStrip(
; CHECK-NEXT:    ret ptr undef
;
  %b2 = call ptr @llvm.strip.invariant.group.p0(ptr undef)
  ret ptr %b2
}

define ptr addrspace(42) @simplifyUndefStrip2() {
; CHECK-LABEL: @simplifyUndefStrip2(
; CHECK-NEXT:    ret ptr addrspace(42) undef
;
  %b2 = call ptr addrspace(42) @llvm.strip.invariant.group.p42(ptr addrspace(42) undef)
  ret ptr addrspace(42) %b2
}

define ptr @simplifyLaunderOfLaunder(ptr %a) {
; CHECK-LABEL: @simplifyLaunderOfLaunder(
; CHECK-NEXT:    [[A3:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr [[A:%.*]])
; CHECK-NEXT:    ret ptr [[A3]]
;
  %a2 = call ptr @llvm.launder.invariant.group.p0(ptr %a)
  %a3 = call ptr @llvm.launder.invariant.group.p0(ptr %a2)
  ret ptr %a3
}

define ptr @simplifyStripOfLaunder(ptr %a) {
; CHECK-LABEL: @simplifyStripOfLaunder(
; CHECK-NEXT:    [[A3:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr [[A:%.*]])
; CHECK-NEXT:    ret ptr [[A3]]
;
  %a2 = call ptr @llvm.launder.invariant.group.p0(ptr %a)
  %a3 = call ptr @llvm.strip.invariant.group.p0(ptr %a2)
  ret ptr %a3
}

define i1 @simplifyForCompare(ptr %a) {
; CHECK-LABEL: @simplifyForCompare(
; CHECK-NEXT:    [[A3:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr [[A:%.*]])
; CHECK-NEXT:    ret i1 true
;
  %a2 = call ptr @llvm.launder.invariant.group.p0(ptr %a)

  %a3 = call ptr @llvm.strip.invariant.group.p0(ptr %a2)
  %b2 = call ptr @llvm.strip.invariant.group.p0(ptr %a)
  %c = icmp eq ptr %a3, %b2
  ret i1 %c
}

define ptr @skipWithDifferentTypes(ptr %a) {
; CHECK-LABEL: @skipWithDifferentTypes(
; CHECK-NEXT:    [[A3:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr [[A:%.*]])
; CHECK-NEXT:    ret ptr [[A3]]
;
  %a2 = call ptr @llvm.launder.invariant.group.p0(ptr %a)

  %a3 = call ptr @llvm.strip.invariant.group.p0(ptr %a2)
  ret ptr %a3
}

define ptr addrspace(42) @skipWithDifferentTypesAddrspace(ptr addrspace(42) %a) {
; CHECK-LABEL: @skipWithDifferentTypesAddrspace(
; CHECK-NEXT:    [[A3:%.*]] = call ptr addrspace(42) @llvm.strip.invariant.group.p42(ptr addrspace(42) [[A:%.*]])
; CHECK-NEXT:    ret ptr addrspace(42) [[A3]]
;
  %a2 = call ptr addrspace(42) @llvm.launder.invariant.group.p42(ptr addrspace(42) %a)

  %a3 = call ptr addrspace(42) @llvm.strip.invariant.group.p42(ptr addrspace(42) %a2)
  ret ptr addrspace(42) %a3
}

define ptr addrspace(42) @skipWithDifferentTypesDifferentAddrspace(ptr %a) {
; CHECK-LABEL: @skipWithDifferentTypesDifferentAddrspace(
; CHECK-NEXT:    [[TMP1:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr [[A:%.*]])
; CHECK-NEXT:    [[A3:%.*]] = addrspacecast ptr [[TMP1]] to ptr addrspace(42)
; CHECK-NEXT:    ret ptr addrspace(42) [[A3]]
;
  %cast = addrspacecast ptr %a to ptr addrspace(42)
  %a2 = call ptr addrspace(42) @llvm.launder.invariant.group.p42(ptr addrspace(42) %cast)

  %a3 = call ptr addrspace(42) @llvm.strip.invariant.group.p42(ptr addrspace(42) %a2)
  ret ptr addrspace(42) %a3
}

define i1 @icmp_null_launder(ptr %a) {
; CHECK-LABEL: @icmp_null_launder(
; CHECK-NEXT:    [[R:%.*]] = icmp eq ptr [[A:%.*]], null
; CHECK-NEXT:    ret i1 [[R]]
;
  %a2 = call ptr @llvm.launder.invariant.group.p0(ptr %a)
  %r = icmp eq ptr %a2, null
  ret i1 %r
}

define i1 @icmp_null_strip(ptr %a) {
; CHECK-LABEL: @icmp_null_strip(
; CHECK-NEXT:    [[R:%.*]] = icmp eq ptr [[A:%.*]], null
; CHECK-NEXT:    ret i1 [[R]]
;
  %a2 = call ptr @llvm.strip.invariant.group.p0(ptr %a)
  %r = icmp eq ptr %a2, null
  ret i1 %r
}

define i1 @icmp_null_launder_valid_null(ptr %a) #0 {
; CHECK-LABEL: @icmp_null_launder_valid_null(
; CHECK-NEXT:    [[A2:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr [[A:%.*]])
; CHECK-NEXT:    [[R:%.*]] = icmp eq ptr [[A2]], null
; CHECK-NEXT:    ret i1 [[R]]
;
  %a2 = call ptr @llvm.launder.invariant.group.p0(ptr %a)
  %r = icmp eq ptr %a2, null
  ret i1 %r
}

define i1 @icmp_null_strip_valid_null(ptr %a) #0 {
; CHECK-LABEL: @icmp_null_strip_valid_null(
; CHECK-NEXT:    [[A2:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr [[A:%.*]])
; CHECK-NEXT:    [[R:%.*]] = icmp eq ptr [[A2]], null
; CHECK-NEXT:    ret i1 [[R]]
;
  %a2 = call ptr @llvm.strip.invariant.group.p0(ptr %a)
  %r = icmp eq ptr %a2, null
  ret i1 %r
}

; Check that null always becomes the RHS
define i1 @icmp_null_launder_lhs(ptr %a) {
; CHECK-LABEL: @icmp_null_launder_lhs(
; CHECK-NEXT:    [[R:%.*]] = icmp eq ptr [[A:%.*]], null
; CHECK-NEXT:    ret i1 [[R]]
;
  %a2 = call ptr @llvm.launder.invariant.group.p0(ptr %a)
  %r = icmp eq ptr null, %a2
  ret i1 %r
}

define i1 @icmp_null_launder_bitcasts(ptr %a) {
; CHECK-LABEL: @icmp_null_launder_bitcasts(
; CHECK-NEXT:    [[R:%.*]] = icmp eq ptr [[A:%.*]], null
; CHECK-NEXT:    ret i1 [[R]]
;
  %a3 = call ptr @llvm.launder.invariant.group.p0(ptr %a)
  %r = icmp eq ptr %a3, null
  ret i1 %r
}

declare ptr @llvm.launder.invariant.group.p0(ptr)
declare ptr addrspace(42) @llvm.launder.invariant.group.p42(ptr addrspace(42))
declare ptr @llvm.strip.invariant.group.p0(ptr)
declare ptr addrspace(42) @llvm.strip.invariant.group.p42(ptr addrspace(42))

attributes #0 = { null_pointer_is_valid }