llvm/test/CodeGen/AMDGPU/loop-vector-sink.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -S -passes='require<profile-summary>,function(codegenprepare)' -mtriple=amdgcn-amd-amdhsa -mcpu=gfx942 < %s | FileCheck -check-prefix=OPT %s

; testing insert case
define amdgpu_kernel void @runningSum(ptr addrspace(1) %out0, ptr addrspace(1) %out1, i32 %inputElement1, i32 %inputIter) {
; OPT-LABEL: define amdgpu_kernel void @runningSum(
; OPT-SAME: ptr addrspace(1) [[OUT0:%.*]], ptr addrspace(1) [[OUT1:%.*]], i32 [[INPUTELEMENT1:%.*]], i32 [[INPUTITER:%.*]]) #[[ATTR0:[0-9]+]] {
; OPT-NEXT:  [[PREHEADER:.*]]:
; OPT-NEXT:    [[VECELEMENT1:%.*]] = insertelement <2 x i32> poison, i32 [[INPUTELEMENT1]], i64 0
; OPT-NEXT:    [[TMP1:%.*]] = shufflevector <2 x i32> [[VECELEMENT1]], <2 x i32> poison, <2 x i32> zeroinitializer
; OPT-NEXT:    br label %[[LOOPBODY:.*]]
; OPT:       [[LOOPBODY]]:
; OPT-NEXT:    [[PREVIOUSSUM:%.*]] = phi <2 x i32> [ [[TMP1]], %[[PREHEADER]] ], [ [[RUNNINGSUM:%.*]], %[[LOOPBODY]] ]
; OPT-NEXT:    [[ITERCOUNT:%.*]] = phi i32 [ [[INPUTITER]], %[[PREHEADER]] ], [ [[ITERSLEFT:%.*]], %[[LOOPBODY]] ]
; OPT-NEXT:    [[RUNNINGSUM]] = add <2 x i32> [[TMP1]], [[PREVIOUSSUM]]
; OPT-NEXT:    [[ITERSLEFT]] = sub i32 [[ITERCOUNT]], 1
; OPT-NEXT:    [[COND:%.*]] = icmp eq i32 [[ITERSLEFT]], 0
; OPT-NEXT:    br i1 [[COND]], label %[[LOOPEXIT:.*]], label %[[LOOPBODY]]
; OPT:       [[LOOPEXIT]]:
; OPT-NEXT:    [[SUMELEMENT0:%.*]] = extractelement <2 x i32> [[RUNNINGSUM]], i64 0
; OPT-NEXT:    [[SUMELEMENT1:%.*]] = extractelement <2 x i32> [[RUNNINGSUM]], i64 1
; OPT-NEXT:    store i32 [[SUMELEMENT0]], ptr addrspace(1) [[OUT0]], align 4
; OPT-NEXT:    store i32 [[SUMELEMENT1]], ptr addrspace(1) [[OUT1]], align 4
; OPT-NEXT:    ret void
;
preheader:
  %vecElement1 = insertelement <2 x i32> poison, i32 %inputElement1, i64 0
  %broadcast1 = shufflevector <2 x i32> %vecElement1, <2 x i32> poison, <2 x i32> zeroinitializer
  br label %loopBody

loopBody:
  %previousSum = phi <2 x i32> [ %broadcast1, %preheader ], [ %runningSum, %loopBody ]
  %iterCount = phi i32 [ %inputIter, %preheader ], [ %itersLeft, %loopBody ]
  %runningSum = add <2 x i32> %broadcast1, %previousSum
  %itersLeft = sub i32 %iterCount, 1
  %cond = icmp eq i32 %itersLeft, 0
  br i1 %cond, label %loopExit, label %loopBody

loopExit:
  %sumElement0 = extractelement <2 x i32> %runningSum, i64 0
  %sumElement1 = extractelement <2 x i32> %runningSum, i64 1
  store i32 %sumElement0, ptr addrspace(1) %out0
  store i32 %sumElement1, ptr addrspace(1) %out1
  ret void
}

; testing extract case with single use - with divergent control flow
; The vector has SINGLE use (extractelement), both sink into if.then
define amdgpu_kernel void @test_sink_extract_single_use_operands(ptr addrspace(1) %out0, <2 x i32> %inputVec, i32 %tid, i32 %cond) {
; OPT-LABEL: define amdgpu_kernel void @test_sink_extract_single_use_operands(
; OPT-SAME: ptr addrspace(1) [[OUT0:%.*]], <2 x i32> [[INPUTVEC:%.*]], i32 [[TID:%.*]], i32 [[COND:%.*]]) #[[ATTR0]] {
; OPT-NEXT:  [[ENTRY:.*:]]
; OPT-NEXT:    [[RUNNINGSUM:%.*]] = add <2 x i32> [[INPUTVEC]], splat (i32 1)
; OPT-NEXT:    [[TMP0:%.*]] = extractelement <2 x i32> [[RUNNINGSUM]], i64 0
; OPT-NEXT:    [[CMP:%.*]] = icmp slt i32 [[TID]], [[COND]]
; OPT-NEXT:    br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; OPT:       [[IF_THEN]]:
; OPT-NEXT:    [[RESULT:%.*]] = add i32 [[TMP0]], 100
; OPT-NEXT:    store i32 [[RESULT]], ptr addrspace(1) [[OUT0]], align 4
; OPT-NEXT:    br label %[[IF_END]]
; OPT:       [[IF_END]]:
; OPT-NEXT:    ret void
;
entry:
  %runningSum = add <2 x i32> %inputVec, <i32 1, i32 1>
  %sumElement0 = extractelement <2 x i32> %runningSum, i64 0
  %cmp = icmp slt i32 %tid, %cond
  br i1 %cmp, label %if.then, label %if.end

if.then:
  %result = add i32 %sumElement0, 100
  store i32 %result, ptr addrspace(1) %out0
  br label %if.end

if.end:
  ret void
}

; testing extract case - extracting two elements with divergent control flow
; The vector has TWO uses (two extractelements), all sink into if.then
define amdgpu_kernel void @test_sink_extract_operands(ptr addrspace(1) %out0, ptr addrspace(1) %out1, <4 x i32> %input_vec, i32 %tid, i32 %cond) {
; OPT-LABEL: define amdgpu_kernel void @test_sink_extract_operands(
; OPT-SAME: ptr addrspace(1) [[OUT0:%.*]], ptr addrspace(1) [[OUT1:%.*]], <4 x i32> [[INPUT_VEC:%.*]], i32 [[TID:%.*]], i32 [[COND:%.*]]) #[[ATTR0]] {
; OPT-NEXT:  [[ENTRY:.*:]]
; OPT-NEXT:    [[VEC_FULL:%.*]] = add <4 x i32> [[INPUT_VEC]], <i32 42, i32 43, i32 44, i32 45>
; OPT-NEXT:    [[TMP0:%.*]] = extractelement <4 x i32> [[VEC_FULL]], i64 0
; OPT-NEXT:    [[TMP1:%.*]] = extractelement <4 x i32> [[VEC_FULL]], i64 1
; OPT-NEXT:    [[CMP:%.*]] = icmp slt i32 [[TID]], [[COND]]
; OPT-NEXT:    br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; OPT:       [[IF_THEN]]:
; OPT-NEXT:    [[RESULT0:%.*]] = add i32 [[TMP0]], 100
; OPT-NEXT:    [[RESULT1:%.*]] = add i32 [[TMP1]], 200
; OPT-NEXT:    store i32 [[RESULT0]], ptr addrspace(1) [[OUT0]], align 4
; OPT-NEXT:    store i32 [[RESULT1]], ptr addrspace(1) [[OUT1]], align 4
; OPT-NEXT:    br label %[[IF_END]]
; OPT:       [[IF_END]]:
; OPT-NEXT:    ret void
;
entry:
  %vec_full = add <4 x i32> %input_vec, <i32 42, i32 43, i32 44, i32 45>
  %extract0 = extractelement <4 x i32> %vec_full, i64 0
  %extract1 = extractelement <4 x i32> %vec_full, i64 1
  %cmp = icmp slt i32 %tid, %cond
  br i1 %cmp, label %if.then, label %if.end

if.then:
  %result0 = add i32 %extract0, 100
  %result1 = add i32 %extract1, 200
  store i32 %result0, ptr addrspace(1) %out0
  store i32 %result1, ptr addrspace(1) %out1
  br label %if.end

if.end:
  ret void
}

; testing shuffle case with divergent control flow - shuffles sink into if.then
define amdgpu_kernel void @test_shuffle_insert_subvector(ptr addrspace(1) %ptr, <4 x i16> %vec1, <4 x i16> %vec2, i32 %tid, i32 %cond) {
; OPT-LABEL: define amdgpu_kernel void @test_shuffle_insert_subvector(
; OPT-SAME: ptr addrspace(1) [[PTR:%.*]], <4 x i16> [[VEC1:%.*]], <4 x i16> [[VEC2:%.*]], i32 [[TID:%.*]], i32 [[COND:%.*]]) #[[ATTR0]] {
; OPT-NEXT:  [[ENTRY:.*:]]
; OPT-NEXT:    [[SHUFFLE:%.*]] = shufflevector <4 x i16> [[VEC1]], <4 x i16> [[VEC2]], <4 x i32> <i32 0, i32 1, i32 4, i32 5>
; OPT-NEXT:    [[SHUFFLE2:%.*]] = shufflevector <4 x i16> [[VEC1]], <4 x i16> [[VEC2]], <4 x i32> <i32 2, i32 3, i32 6, i32 7>
; OPT-NEXT:    [[SHUFFLE3:%.*]] = shufflevector <4 x i16> [[VEC1]], <4 x i16> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; OPT-NEXT:    [[SHUFFLE4:%.*]] = shufflevector <4 x i16> [[VEC2]], <4 x i16> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
; OPT-NEXT:    [[SHUFFLE5:%.*]] = shufflevector <4 x i16> [[SHUFFLE]], <4 x i16> [[SHUFFLE2]], <4 x i32> <i32 0, i32 2, i32 4, i32 6>
; OPT-NEXT:    [[CMP:%.*]] = icmp slt i32 [[TID]], [[COND]]
; OPT-NEXT:    br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; OPT:       [[IF_THEN]]:
; OPT-NEXT:    [[RESULT_VEC:%.*]] = add <4 x i16> [[SHUFFLE5]], <i16 100, i16 200, i16 300, i16 400>
; OPT-NEXT:    [[OTHER_RESULT:%.*]] = mul <4 x i16> [[SHUFFLE3]], splat (i16 2)
; OPT-NEXT:    [[MORE_RESULT:%.*]] = sub <4 x i16> [[SHUFFLE4]], splat (i16 5)
; OPT-NEXT:    store <4 x i16> [[RESULT_VEC]], ptr addrspace(1) [[PTR]], align 8
; OPT-NEXT:    store <4 x i16> [[OTHER_RESULT]], ptr addrspace(1) [[PTR]], align 8
; OPT-NEXT:    store <4 x i16> [[MORE_RESULT]], ptr addrspace(1) [[PTR]], align 8
; OPT-NEXT:    br label %[[IF_END]]
; OPT:       [[IF_END]]:
; OPT-NEXT:    ret void
;
entry:
  %shuffle = shufflevector <4 x i16> %vec1, <4 x i16> %vec2, <4 x i32> <i32 0, i32 1, i32 4, i32 5>
  %shuffle2 = shufflevector <4 x i16> %vec1, <4 x i16> %vec2, <4 x i32> <i32 2, i32 3, i32 6, i32 7>
  %shuffle3 = shufflevector <4 x i16> %vec1, <4 x i16> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
  %shuffle4 = shufflevector <4 x i16> %vec2, <4 x i16> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
  %shuffle5 = shufflevector <4 x i16> %shuffle, <4 x i16> %shuffle2, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
  %cmp = icmp slt i32 %tid, %cond
  br i1 %cmp, label %if.then, label %if.end

if.then:
  %result_vec = add <4 x i16> %shuffle5, <i16 100, i16 200, i16 300, i16 400>
  %other_result = mul <4 x i16> %shuffle3, <i16 2, i16 2, i16 2, i16 2>
  %more_result = sub <4 x i16> %shuffle4, <i16 5, i16 5, i16 5, i16 5>
  store <4 x i16> %result_vec, ptr addrspace(1) %ptr
  store <4 x i16> %other_result, ptr addrspace(1) %ptr
  store <4 x i16> %more_result, ptr addrspace(1) %ptr
  br label %if.end

if.end:
  ret void
}

; testing shuffle extract subvector with divergent control flow - shuffles sink into if.then
define amdgpu_kernel void @test_shuffle_extract_subvector(ptr addrspace(1) %ptr, <4 x i16> %input_vec, i32 %tid, i32 %cond) {
; OPT-LABEL: define amdgpu_kernel void @test_shuffle_extract_subvector(
; OPT-SAME: ptr addrspace(1) [[PTR:%.*]], <4 x i16> [[INPUT_VEC:%.*]], i32 [[TID:%.*]], i32 [[COND:%.*]]) #[[ATTR0]] {
; OPT-NEXT:  [[ENTRY:.*:]]
; OPT-NEXT:    [[SHUFFLE:%.*]] = shufflevector <4 x i16> [[INPUT_VEC]], <4 x i16> poison, <2 x i32> <i32 2, i32 3>
; OPT-NEXT:    [[SHUFFLE2:%.*]] = shufflevector <4 x i16> [[INPUT_VEC]], <4 x i16> poison, <2 x i32> <i32 0, i32 1>
; OPT-NEXT:    [[SHUFFLE3:%.*]] = shufflevector <4 x i16> [[INPUT_VEC]], <4 x i16> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; OPT-NEXT:    [[CMP:%.*]] = icmp slt i32 [[TID]], [[COND]]
; OPT-NEXT:    br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; OPT:       [[IF_THEN]]:
; OPT-NEXT:    [[RESULT_VEC:%.*]] = add <2 x i16> [[SHUFFLE]], <i16 100, i16 200>
; OPT-NEXT:    [[RESULT_VEC2:%.*]] = mul <2 x i16> [[SHUFFLE2]], splat (i16 3)
; OPT-NEXT:    [[RESULT_VEC3:%.*]] = sub <4 x i16> [[SHUFFLE3]], splat (i16 10)
; OPT-NEXT:    store <2 x i16> [[RESULT_VEC]], ptr addrspace(1) [[PTR]], align 4
; OPT-NEXT:    store <2 x i16> [[RESULT_VEC2]], ptr addrspace(1) [[PTR]], align 4
; OPT-NEXT:    store <4 x i16> [[RESULT_VEC3]], ptr addrspace(1) [[PTR]], align 8
; OPT-NEXT:    br label %[[IF_END]]
; OPT:       [[IF_END]]:
; OPT-NEXT:    ret void
;
entry:
  %shuffle = shufflevector <4 x i16> %input_vec, <4 x i16> poison, <2 x i32> <i32 2, i32 3>
  %shuffle2 = shufflevector <4 x i16> %input_vec, <4 x i16> poison, <2 x i32> <i32 0, i32 1>
  %shuffle3 = shufflevector <4 x i16> %input_vec, <4 x i16> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
  %cmp = icmp slt i32 %tid, %cond
  br i1 %cmp, label %if.then, label %if.end

if.then:
  %result_vec = add <2 x i16> %shuffle, <i16 100, i16 200>
  %result_vec2 = mul <2 x i16> %shuffle2, <i16 3, i16 3>
  %result_vec3 = sub <4 x i16> %shuffle3, <i16 10, i16 10, i16 10, i16 10>
  store <2 x i16> %result_vec, ptr addrspace(1) %ptr
  store <2 x i16> %result_vec2, ptr addrspace(1) %ptr
  store <4 x i16> %result_vec3, ptr addrspace(1) %ptr
  br label %if.end

if.end:
  ret void
}

; testing shuffle sink with widening operations and divergent control flow
define amdgpu_kernel void @test_shuffle_sink_operands(ptr addrspace(1) %ptr, <2 x i16> %input_vec, <2 x i16> %input_vec2, i32 %tid, i32 %cond) {
; OPT-LABEL: define amdgpu_kernel void @test_shuffle_sink_operands(
; OPT-SAME: ptr addrspace(1) [[PTR:%.*]], <2 x i16> [[INPUT_VEC:%.*]], <2 x i16> [[INPUT_VEC2:%.*]], i32 [[TID:%.*]], i32 [[COND:%.*]]) #[[ATTR0]] {
; OPT-NEXT:  [[ENTRY:.*:]]
; OPT-NEXT:    [[SHUFFLE:%.*]] = shufflevector <2 x i16> [[INPUT_VEC]], <2 x i16> poison, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
; OPT-NEXT:    [[SHUFFLE2:%.*]] = shufflevector <2 x i16> [[INPUT_VEC2]], <2 x i16> poison, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
; OPT-NEXT:    [[CMP:%.*]] = icmp slt i32 [[TID]], [[COND]]
; OPT-NEXT:    br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; OPT:       [[IF_THEN]]:
; OPT-NEXT:    [[RESULT_VEC:%.*]] = add <4 x i16> [[SHUFFLE]], <i16 100, i16 200, i16 300, i16 400>
; OPT-NEXT:    [[RESULT_VEC2:%.*]] = mul <4 x i16> [[SHUFFLE2]], splat (i16 5)
; OPT-NEXT:    store <4 x i16> [[RESULT_VEC]], ptr addrspace(1) [[PTR]], align 8
; OPT-NEXT:    store <4 x i16> [[RESULT_VEC2]], ptr addrspace(1) [[PTR]], align 8
; OPT-NEXT:    br label %[[IF_END]]
; OPT:       [[IF_END]]:
; OPT-NEXT:    ret void
;
entry:
  %shuffle = shufflevector <2 x i16> %input_vec, <2 x i16> poison, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
  %shuffle2 = shufflevector <2 x i16> %input_vec2, <2 x i16> poison, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
  %cmp = icmp slt i32 %tid, %cond
  br i1 %cmp, label %if.then, label %if.end

if.then:
  %result_vec = add <4 x i16> %shuffle, <i16 100, i16 200, i16 300, i16 400>
  %result_vec2 = mul <4 x i16> %shuffle2, <i16 5, i16 5, i16 5, i16 5>
  store <4 x i16> %result_vec, ptr addrspace(1) %ptr
  store <4 x i16> %result_vec2, ptr addrspace(1) %ptr
  br label %if.end

if.end:
  ret void
}