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clang-p2996/llvm/test/Transforms/SLPVectorizer/X86/jumbled-load.ll
Juneyoung Lee 4a8e6ed2f7 [SLP,LV] Use poison constant vector for shufflevector/initial insertelement 
This patch makes SLP and LV emit operations with initial vectors set to poison constant instead of undef.
This is a part of efforts for using poison vector instead of undef to represent "doesn't care" vector.
The goal is to make nice shufflevector optimizations valid that is currently incorrect due to the tricky interaction between undef and poison (see https://bugs.llvm.org/show_bug.cgi?id=44185 ).

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D94061
2021-01-06 11:22:50 +09:00

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6.3 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -S -mtriple=x86_64-unknown -mattr=+avx -slp-vectorizer | FileCheck %s
define i32 @jumbled-load(i32* noalias nocapture %in, i32* noalias nocapture %inn, i32* noalias nocapture %out) {
; CHECK-LABEL: @jumbled-load(
; CHECK-NEXT: [[IN_ADDR:%.*]] = getelementptr inbounds i32, i32* [[IN:%.*]], i64 0
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, i32* [[IN_ADDR]], i64 3
; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr inbounds i32, i32* [[IN_ADDR]], i64 1
; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr inbounds i32, i32* [[IN_ADDR]], i64 2
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i32* [[IN_ADDR]] to <4 x i32>*
; CHECK-NEXT: [[TMP2:%.*]] = load <4 x i32>, <4 x i32>* [[TMP1]], align 4
; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x i32> [[TMP2]], <4 x i32> poison, <4 x i32> <i32 1, i32 3, i32 2, i32 0>
; CHECK-NEXT: [[INN_ADDR:%.*]] = getelementptr inbounds i32, i32* [[INN:%.*]], i64 0
; CHECK-NEXT: [[GEP_4:%.*]] = getelementptr inbounds i32, i32* [[INN_ADDR]], i64 2
; CHECK-NEXT: [[GEP_5:%.*]] = getelementptr inbounds i32, i32* [[INN_ADDR]], i64 3
; CHECK-NEXT: [[GEP_6:%.*]] = getelementptr inbounds i32, i32* [[INN_ADDR]], i64 1
; CHECK-NEXT: [[TMP3:%.*]] = bitcast i32* [[INN_ADDR]] to <4 x i32>*
; CHECK-NEXT: [[TMP4:%.*]] = load <4 x i32>, <4 x i32>* [[TMP3]], align 4
; CHECK-NEXT: [[SHUFFLE1:%.*]] = shufflevector <4 x i32> [[TMP4]], <4 x i32> poison, <4 x i32> <i32 0, i32 1, i32 3, i32 2>
; CHECK-NEXT: [[TMP5:%.*]] = mul <4 x i32> [[SHUFFLE]], [[SHUFFLE1]]
; CHECK-NEXT: [[GEP_7:%.*]] = getelementptr inbounds i32, i32* [[OUT:%.*]], i64 0
; CHECK-NEXT: [[GEP_8:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 1
; CHECK-NEXT: [[GEP_9:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 2
; CHECK-NEXT: [[GEP_10:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 3
; CHECK-NEXT: [[TMP6:%.*]] = bitcast i32* [[GEP_7]] to <4 x i32>*
; CHECK-NEXT: store <4 x i32> [[TMP5]], <4 x i32>* [[TMP6]], align 4
; CHECK-NEXT: ret i32 undef
;
%in.addr = getelementptr inbounds i32, i32* %in, i64 0
%load.1 = load i32, i32* %in.addr, align 4
%gep.1 = getelementptr inbounds i32, i32* %in.addr, i64 3
%load.2 = load i32, i32* %gep.1, align 4
%gep.2 = getelementptr inbounds i32, i32* %in.addr, i64 1
%load.3 = load i32, i32* %gep.2, align 4
%gep.3 = getelementptr inbounds i32, i32* %in.addr, i64 2
%load.4 = load i32, i32* %gep.3, align 4
%inn.addr = getelementptr inbounds i32, i32* %inn, i64 0
%load.5 = load i32, i32* %inn.addr, align 4
%gep.4 = getelementptr inbounds i32, i32* %inn.addr, i64 2
%load.6 = load i32, i32* %gep.4, align 4
%gep.5 = getelementptr inbounds i32, i32* %inn.addr, i64 3
%load.7 = load i32, i32* %gep.5, align 4
%gep.6 = getelementptr inbounds i32, i32* %inn.addr, i64 1
%load.8 = load i32, i32* %gep.6, align 4
%mul.1 = mul i32 %load.3, %load.5
%mul.2 = mul i32 %load.2, %load.8
%mul.3 = mul i32 %load.4, %load.7
%mul.4 = mul i32 %load.1, %load.6
%gep.7 = getelementptr inbounds i32, i32* %out, i64 0
store i32 %mul.1, i32* %gep.7, align 4
%gep.8 = getelementptr inbounds i32, i32* %out, i64 1
store i32 %mul.2, i32* %gep.8, align 4
%gep.9 = getelementptr inbounds i32, i32* %out, i64 2
store i32 %mul.3, i32* %gep.9, align 4
%gep.10 = getelementptr inbounds i32, i32* %out, i64 3
store i32 %mul.4, i32* %gep.10, align 4
ret i32 undef
}
define i32 @jumbled-load-multiuses(i32* noalias nocapture %in, i32* noalias nocapture %out) {
; CHECK-LABEL: @jumbled-load-multiuses(
; CHECK-NEXT: [[IN_ADDR:%.*]] = getelementptr inbounds i32, i32* [[IN:%.*]], i64 0
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, i32* [[IN_ADDR]], i64 3
; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr inbounds i32, i32* [[IN_ADDR]], i64 1
; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr inbounds i32, i32* [[IN_ADDR]], i64 2
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i32* [[IN_ADDR]] to <4 x i32>*
; CHECK-NEXT: [[TMP2:%.*]] = load <4 x i32>, <4 x i32>* [[TMP1]], align 4
; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x i32> [[TMP2]], <4 x i32> poison, <4 x i32> <i32 1, i32 3, i32 2, i32 0>
; CHECK-NEXT: [[TMP3:%.*]] = extractelement <4 x i32> [[SHUFFLE]], i32 2
; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x i32> poison, i32 [[TMP3]], i32 0
; CHECK-NEXT: [[TMP5:%.*]] = extractelement <4 x i32> [[SHUFFLE]], i32 1
; CHECK-NEXT: [[TMP6:%.*]] = insertelement <4 x i32> [[TMP4]], i32 [[TMP5]], i32 1
; CHECK-NEXT: [[TMP7:%.*]] = extractelement <4 x i32> [[SHUFFLE]], i32 3
; CHECK-NEXT: [[TMP8:%.*]] = insertelement <4 x i32> [[TMP6]], i32 [[TMP7]], i32 2
; CHECK-NEXT: [[TMP9:%.*]] = extractelement <4 x i32> [[SHUFFLE]], i32 0
; CHECK-NEXT: [[TMP10:%.*]] = insertelement <4 x i32> [[TMP8]], i32 [[TMP9]], i32 3
; CHECK-NEXT: [[TMP11:%.*]] = mul <4 x i32> [[SHUFFLE]], [[TMP10]]
; CHECK-NEXT: [[GEP_7:%.*]] = getelementptr inbounds i32, i32* [[OUT:%.*]], i64 0
; CHECK-NEXT: [[GEP_8:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 1
; CHECK-NEXT: [[GEP_9:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 2
; CHECK-NEXT: [[GEP_10:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 3
; CHECK-NEXT: [[TMP12:%.*]] = bitcast i32* [[GEP_7]] to <4 x i32>*
; CHECK-NEXT: store <4 x i32> [[TMP11]], <4 x i32>* [[TMP12]], align 4
; CHECK-NEXT: ret i32 undef
;
%in.addr = getelementptr inbounds i32, i32* %in, i64 0
%load.1 = load i32, i32* %in.addr, align 4
%gep.1 = getelementptr inbounds i32, i32* %in.addr, i64 3
%load.2 = load i32, i32* %gep.1, align 4
%gep.2 = getelementptr inbounds i32, i32* %in.addr, i64 1
%load.3 = load i32, i32* %gep.2, align 4
%gep.3 = getelementptr inbounds i32, i32* %in.addr, i64 2
%load.4 = load i32, i32* %gep.3, align 4
%mul.1 = mul i32 %load.3, %load.4
%mul.2 = mul i32 %load.2, %load.2
%mul.3 = mul i32 %load.4, %load.1
%mul.4 = mul i32 %load.1, %load.3
%gep.7 = getelementptr inbounds i32, i32* %out, i64 0
store i32 %mul.1, i32* %gep.7, align 4
%gep.8 = getelementptr inbounds i32, i32* %out, i64 1
store i32 %mul.2, i32* %gep.8, align 4
%gep.9 = getelementptr inbounds i32, i32* %out, i64 2
store i32 %mul.3, i32* %gep.9, align 4
%gep.10 = getelementptr inbounds i32, i32* %out, i64 3
store i32 %mul.4, i32* %gep.10, align 4
ret i32 undef
}
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