llvm/llvm/test/Transforms/InstCombine/AMDGPU/issue68120.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -passes=instcombine %s | FileCheck %s

; It is illegal to pass ptr addrspace(4) in %arg by addrspacecasting
; to ptr addrspace(5) to pass off to the stack argument. A temporary
; alloca and memcpy is necessary.
define void @issue68120_invalid_addrspacecast_introduced_0(ptr addrspace(4) byref([56 x i8]) %arg) {
; CHECK-LABEL: define void @issue68120_invalid_addrspacecast_introduced_0(
; CHECK-SAME: ptr addrspace(4) byref([56 x i8]) [[ARG:%.*]]) {
; CHECK-NEXT:    [[ADDRSPACECAST_0_TO_5:%.*]] = alloca [56 x i8], align 1, addrspace(5)
; CHECK-NEXT:    call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) noundef align 1 dereferenceable(56) [[ADDRSPACECAST_0_TO_5]], ptr addrspace(4) noundef align 1 dereferenceable(56) [[ARG]], i64 56, i1 false)
; CHECK-NEXT:    call void @byval_func(ptr addrspace(5) [[ADDRSPACECAST_0_TO_5]])
; CHECK-NEXT:    ret void
;
  %alloca = alloca [56 x i8], addrspace(5)
  %alloca1 = alloca [56 x i8], addrspace(5)
  call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) %alloca, ptr addrspace(4) %arg, i64 56, i1 false)
  call void @llvm.memcpy.p5.p5.i64(ptr addrspace(5) %alloca1, ptr addrspace(5) %alloca, i64 56, i1 false)
  %addrspacecast.alloca1 = addrspacecast ptr addrspace(5) %alloca1 to ptr
  %addrspacecast.0.to.5 = addrspacecast ptr %addrspacecast.alloca1 to ptr addrspace(5)
  call void @byval_func(ptr addrspace(5) %addrspacecast.0.to.5)
  ret void
}

; Further reduced variant that already eliminated one of the copies
define void @issue68120_invalid_addrspacecast_introduced_1(ptr addrspace(4) byref([56 x i8]) %arg) {
; CHECK-LABEL: define void @issue68120_invalid_addrspacecast_introduced_1(
; CHECK-SAME: ptr addrspace(4) byref([56 x i8]) [[ARG:%.*]]) {
; CHECK-NEXT:    [[ADDRSPACECAST_0_TO_5:%.*]] = alloca [56 x i8], align 1, addrspace(5)
; CHECK-NEXT:    call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) noundef align 1 dereferenceable(56) [[ADDRSPACECAST_0_TO_5]], ptr addrspace(4) noundef align 1 dereferenceable(56) [[ARG]], i64 56, i1 false)
; CHECK-NEXT:    call void @byval_func(ptr addrspace(5) [[ADDRSPACECAST_0_TO_5]])
; CHECK-NEXT:    ret void
;
  %alloca = alloca [56 x i8], addrspace(5)
  call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) %alloca, ptr addrspace(4) %arg, i64 56, i1 false)
  %addrspacecast.alloca = addrspacecast ptr addrspace(5) %alloca to ptr
  %addrspacecast.0.to.5 = addrspacecast ptr %addrspacecast.alloca to ptr addrspace(5)
  call void @byval_func(ptr addrspace(5) %addrspacecast.0.to.5)
  ret void
}

define void @issue68120_use_cast_to_as0(ptr addrspace(4) byref([56 x i8]) %arg) {
; CHECK-LABEL: define void @issue68120_use_cast_to_as0(
; CHECK-SAME: ptr addrspace(4) byref([56 x i8]) [[ARG:%.*]]) {
; CHECK-NEXT:    [[ALLOCA:%.*]] = alloca [56 x i8], align 1, addrspace(5)
; CHECK-NEXT:    call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) noundef align 1 dereferenceable(56) [[ALLOCA]], ptr addrspace(4) noundef align 1 dereferenceable(56) [[ARG]], i64 56, i1 false)
; CHECK-NEXT:    [[ADDRSPACECAST_ALLOCA:%.*]] = addrspacecast ptr addrspace(5) [[ALLOCA]] to ptr
; CHECK-NEXT:    call void @other_func(ptr [[ADDRSPACECAST_ALLOCA]])
; CHECK-NEXT:    ret void
;
  %alloca = alloca [56 x i8], addrspace(5)
  call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) %alloca, ptr addrspace(4) %arg, i64 56, i1 false)
  %addrspacecast.alloca = addrspacecast ptr addrspace(5) %alloca to ptr
  %addrspacecast.0.to.5 = addrspacecast ptr %addrspacecast.alloca to ptr addrspace(5)
  call void @other_func(ptr %addrspacecast.alloca)
  ret void
}

define void @issue68120_uses_invalid_addrspacecast(ptr addrspace(4) byref([56 x i8]) %arg) {
; CHECK-LABEL: define void @issue68120_uses_invalid_addrspacecast(
; CHECK-SAME: ptr addrspace(4) byref([56 x i8]) [[ARG:%.*]]) {
; CHECK-NEXT:    [[ADDRSPACECAST_0_TO_5:%.*]] = alloca [56 x i8], align 1, addrspace(5)
; CHECK-NEXT:    call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) noundef align 1 dereferenceable(56) [[ADDRSPACECAST_0_TO_5]], ptr addrspace(4) noundef align 1 dereferenceable(56) [[ARG]], i64 56, i1 false)
; CHECK-NEXT:    call void @byval_func(ptr addrspace(5) [[ADDRSPACECAST_0_TO_5]])
; CHECK-NEXT:    ret void
;
  %alloca = alloca [56 x i8], addrspace(5)
  %alloca1 = alloca [56 x i8], addrspace(5)
  %illegal.cast = addrspacecast ptr addrspace(4) %arg to ptr addrspace(5)
  call void @llvm.memcpy.p5.p5.i64(ptr addrspace(5) %alloca, ptr addrspace(5) %illegal.cast, i64 56, i1 false)
  call void @llvm.memcpy.p5.p5.i64(ptr addrspace(5) %alloca1, ptr addrspace(5) %alloca, i64 56, i1 false)
  %addrspacecast.alloca1 = addrspacecast ptr addrspace(5) %alloca1 to ptr
  %addrspacecast.0.to.5 = addrspacecast ptr %addrspacecast.alloca1 to ptr addrspace(5)
  call void @byval_func(ptr addrspace(5) %addrspacecast.0.to.5)
  ret void
}


declare void @byval_func(ptr addrspace(5) byval([56 x i8]))
declare void @other_func(ptr)