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[LV] Add epilogue test with variable induction start value.
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Add additional test mentioned by @venkataramanan.kumar.llvm in
D92132.
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@fhahn
fhahn committed Oct 13, 2022
1 parent 9d1f646 commit 518bccf
Showing 1 changed file with 76 additions and 14 deletions.
90 changes: 76 additions & 14 deletions llvm/test/Transforms/LoopVectorize/AArch64/epilog-vectorization-widen-inductions.ll
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@@ -1,4 +1,4 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --replace-value-regex "!llvm.loop ![0-9]+"
; RUN: opt -passes='loop-vectorize' -force-vector-width=2 -enable-epilogue-vectorization -epilogue-vectorization-force-VF=2 -S %s | FileCheck %s

target triple = "arm64-apple-macosx"
Expand Down Expand Up @@ -42,7 +42,7 @@ define void @test_widen_ptr_induction(ptr %ptr.start.1) {
; CHECK-NEXT: store <2 x i8> zeroinitializer, ptr [[TMP15]], align 1
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[TMP16:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
; CHECK-NEXT: br i1 [[TMP16]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK-NEXT: br i1 [[TMP16]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 10001, 10000
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
Expand Down Expand Up @@ -70,7 +70,7 @@ define void @test_widen_ptr_induction(ptr %ptr.start.1) {
; CHECK-NEXT: store <2 x i8> zeroinitializer, ptr [[TMP24]], align 1
; CHECK-NEXT: [[INDEX_NEXT10]] = add nuw i64 [[INDEX7]], 2
; CHECK-NEXT: [[TMP25:%.*]] = icmp eq i64 [[INDEX_NEXT10]], 10000
; CHECK-NEXT: br i1 [[TMP25]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP2:![0-9]+]]
; CHECK-NEXT: br i1 [[TMP25]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK: vec.epilog.middle.block:
; CHECK-NEXT: [[CMP_N6:%.*]] = icmp eq i64 10001, 10000
; CHECK-NEXT: br i1 [[CMP_N6]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
Expand All @@ -87,7 +87,7 @@ define void @test_widen_ptr_induction(ptr %ptr.start.1) {
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds i8, ptr [[PTR_IV]], i64 1
; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV]], 10000
; CHECK-NEXT: br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK-NEXT: br i1 [[EC]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK: exit:
; CHECK-NEXT: ret void
;
Expand All @@ -111,7 +111,7 @@ exit:

declare void @llvm.assume(i1 noundef)

define void @test_widen_induction(i32 %init, ptr %A, i64 %N, i32 %step) {
define void @test_widen_induction(ptr %A, i64 %N) {
; CHECK-LABEL: @test_widen_induction(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], 4
Expand All @@ -135,7 +135,7 @@ define void @test_widen_induction(i32 %init, ptr %A, i64 %N, i32 %step) {
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[STEP_ADD]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
Expand All @@ -148,7 +148,7 @@ define void @test_widen_induction(i32 %init, ptr %A, i64 %N, i32 %step) {
; CHECK-NEXT: store i64 [[IV_1]], ptr [[GEP_A]], align 4
; CHECK-NEXT: [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_1_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK: exit:
; CHECK-NEXT: ret void
;
Expand All @@ -167,7 +167,69 @@ exit:
ret void
}

define void @test_widen_induction_step_2(i32 %init, ptr %A, i64 %N, i32 %step) {
define void @test_widen_induction_variable_start(ptr %A, i64 %N, i64 %start) {
; CHECK-LABEL: @test_widen_induction_variable_start(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = sub i64 [[N:%.*]], [[START:%.*]]
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[TMP0]], 4
; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; CHECK-NEXT: [[IND_END:%.*]] = add i64 [[START]], [[N_VEC]]
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[START]], i32 0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <2 x i64> [[DOTSPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT: [[INDUCTION:%.*]] = add <2 x i64> [[DOTSPLAT]], <i64 0, i64 1>
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ [[INDUCTION]], [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[STEP_ADD:%.*]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT: [[OFFSET_IDX:%.*]] = add i64 [[START]], [[INDEX]]
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[OFFSET_IDX]], 0
; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[OFFSET_IDX]], 2
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i64, ptr [[A:%.*]], i64 [[TMP1]]
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP2]]
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[TMP3]], i32 0
; CHECK-NEXT: store <2 x i64> [[VEC_IND]], ptr [[TMP5]], align 4
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i64, ptr [[TMP3]], i32 2
; CHECK-NEXT: store <2 x i64> [[STEP_ADD]], ptr [[TMP6]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[STEP_ADD]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[START]], [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV_1:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[GEP_A:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV_1]]
; CHECK-NEXT: store i64 [[IV_1]], ptr [[GEP_A]], align 4
; CHECK-NEXT: [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_1_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop

loop:
%iv.1 = phi i64 [ %start, %entry ], [ %iv.1.next, %loop ]
%gep.A = getelementptr inbounds i64, ptr %A, i64 %iv.1
store i64 %iv.1, ptr %gep.A, align 4
%iv.1.next = add nuw nsw i64 %iv.1, 1
%exitcond = icmp eq i64 %iv.1.next, %N
br i1 %exitcond, label %exit, label %loop

exit:
ret void
}

define void @test_widen_induction_step_2(ptr %A, i64 %N, i32 %step) {
; CHECK-LABEL: @test_widen_induction_step_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], 4
Expand All @@ -193,7 +255,7 @@ define void @test_widen_induction_step_2(i32 %init, ptr %A, i64 %N, i32 %step) {
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[STEP_ADD]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[IND_END]]
; CHECK-NEXT: br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK-NEXT: br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[IND_END]]
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
Expand All @@ -210,7 +272,7 @@ define void @test_widen_induction_step_2(i32 %init, ptr %A, i64 %N, i32 %step) {
; CHECK-NEXT: [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1
; CHECK-NEXT: [[IV_2_NEXT:%.*]] = add nuw nsw i64 [[IV_1]], 2
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_1_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK: exit:
; CHECK-NEXT: ret void
;
Expand Down Expand Up @@ -258,7 +320,7 @@ define void @test_widen_extended_induction(ptr %dst) {
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i8> [[STEP_ADD]], <i8 2, i8 2>
; CHECK-NEXT: [[TMP8:%.*]] = icmp eq i32 [[INDEX_NEXT]], 10000
; CHECK-NEXT: br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK-NEXT: br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 10000, 10000
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
Expand All @@ -273,7 +335,7 @@ define void @test_widen_extended_induction(ptr %dst) {
; CHECK-NEXT: [[IV_NEXT]] = add i8 [[IV]], 1
; CHECK-NEXT: [[IV_NEXT_EXT:%.*]] = zext i8 [[IV_NEXT]] to i32
; CHECK-NEXT: [[EC:%.*]] = icmp eq i32 [[IV_NEXT_EXT]], 10000
; CHECK-NEXT: br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK-NEXT: br i1 [[EC]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK: exit:
; CHECK-NEXT: ret void
;
Expand Down Expand Up @@ -315,7 +377,7 @@ define void @test_widen_truncated_induction(ptr %A) {
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i8> [[STEP_ADD]], <i8 2, i8 2>
; CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
; CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP11:![0-9]+]]
; CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 10000, 10000
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
Expand All @@ -329,7 +391,7 @@ define void @test_widen_truncated_induction(ptr %A) {
; CHECK-NEXT: store i8 [[IV_TRUNC]], ptr [[ARRAYIDX]], align 1
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[IV_NEXT]], 10000
; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP]], label [[EXIT]], !llvm.loop [[LOOP12:![0-9]+]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP]], label [[EXIT]], {{!llvm.loop ![0-9]+}}
; CHECK: exit:
; CHECK-NEXT: ret void
;
Expand Down

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