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llvm-project/llvm/test/Transforms/SLPVectorizer/AArch64/matmul.ll
Philip Reames 7d6e8f2a96 [slp] Delete dead scalar instructions feeding vectorized instructions 
If we vectorize a e.g. store, we leave around a bunch of getelementptrs for the individual scalar stores which we removed. We can go ahead and delete them as well.

This is purely for test output quality and readability. It should have no effect in any sane pipeline.

Differential Revision: https://reviews.llvm.org/D122493
2022-03-28 20:10:13 -07:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basic-aa -slp-vectorizer -S -mtriple=aarch64-unknown-unknown -mcpu=cortex-a53 | FileCheck %s
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
; This test is reduced from the matrix multiplication benchmark in the test-suite:
; https://github.com/llvm/llvm-test-suite/tree/main/SingleSource/Benchmarks/Misc/matmul_f64_4x4.c
; The operations here are expected to be vectorized to <2 x double>.
; Otherwise, performance will suffer on Cortex-A53.
define void @wrap_mul4(double* nocapture %Out, [2 x double]* nocapture readonly %A, [4 x double]* nocapture readonly %B) {
; CHECK-LABEL: @wrap_mul4(
; CHECK-NEXT: [[ARRAYIDX1_I:%.*]] = getelementptr inbounds [2 x double], [2 x double]* [[A:%.*]], i64 0, i64 0
; CHECK-NEXT: [[TEMP:%.*]] = load double, double* [[ARRAYIDX1_I]], align 8
; CHECK-NEXT: [[ARRAYIDX3_I:%.*]] = getelementptr inbounds [4 x double], [4 x double]* [[B:%.*]], i64 0, i64 0
; CHECK-NEXT: [[ARRAYIDX5_I:%.*]] = getelementptr inbounds [2 x double], [2 x double]* [[A]], i64 0, i64 1
; CHECK-NEXT: [[TEMP2:%.*]] = load double, double* [[ARRAYIDX5_I]], align 8
; CHECK-NEXT: [[ARRAYIDX7_I:%.*]] = getelementptr inbounds [4 x double], [4 x double]* [[B]], i64 1, i64 0
; CHECK-NEXT: [[ARRAYIDX25_I:%.*]] = getelementptr inbounds [4 x double], [4 x double]* [[B]], i64 0, i64 2
; CHECK-NEXT: [[ARRAYIDX30_I:%.*]] = getelementptr inbounds [4 x double], [4 x double]* [[B]], i64 1, i64 2
; CHECK-NEXT: [[ARRAYIDX47_I:%.*]] = getelementptr inbounds [2 x double], [2 x double]* [[A]], i64 1, i64 0
; CHECK-NEXT: [[TEMP10:%.*]] = load double, double* [[ARRAYIDX47_I]], align 8
; CHECK-NEXT: [[ARRAYIDX52_I:%.*]] = getelementptr inbounds [2 x double], [2 x double]* [[A]], i64 1, i64 1
; CHECK-NEXT: [[TEMP11:%.*]] = load double, double* [[ARRAYIDX52_I]], align 8
; CHECK-NEXT: [[TMP1:%.*]] = bitcast double* [[ARRAYIDX3_I]] to <2 x double>*
; CHECK-NEXT: [[TMP2:%.*]] = load <2 x double>, <2 x double>* [[TMP1]], align 8
; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> poison, double [[TEMP]], i32 0
; CHECK-NEXT: [[TMP4:%.*]] = insertelement <2 x double> [[TMP3]], double [[TEMP]], i32 1
; CHECK-NEXT: [[TMP5:%.*]] = fmul <2 x double> [[TMP4]], [[TMP2]]
; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[ARRAYIDX7_I]] to <2 x double>*
; CHECK-NEXT: [[TMP7:%.*]] = load <2 x double>, <2 x double>* [[TMP6]], align 8
; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x double> poison, double [[TEMP2]], i32 0
; CHECK-NEXT: [[TMP9:%.*]] = insertelement <2 x double> [[TMP8]], double [[TEMP2]], i32 1
; CHECK-NEXT: [[TMP10:%.*]] = fmul <2 x double> [[TMP9]], [[TMP7]]
; CHECK-NEXT: [[TMP11:%.*]] = fadd <2 x double> [[TMP5]], [[TMP10]]
; CHECK-NEXT: [[TMP12:%.*]] = bitcast double* [[OUT:%.*]] to <2 x double>*
; CHECK-NEXT: [[RES_I_SROA_5_0_OUT2_I_SROA_IDX4:%.*]] = getelementptr inbounds double, double* [[OUT]], i64 2
; CHECK-NEXT: [[TMP13:%.*]] = bitcast double* [[ARRAYIDX25_I]] to <2 x double>*
; CHECK-NEXT: [[TMP14:%.*]] = load <2 x double>, <2 x double>* [[TMP13]], align 8
; CHECK-NEXT: [[TMP15:%.*]] = fmul <2 x double> [[TMP4]], [[TMP14]]
; CHECK-NEXT: [[TMP16:%.*]] = bitcast double* [[ARRAYIDX30_I]] to <2 x double>*
; CHECK-NEXT: [[TMP17:%.*]] = load <2 x double>, <2 x double>* [[TMP16]], align 8
; CHECK-NEXT: [[TMP18:%.*]] = fmul <2 x double> [[TMP9]], [[TMP17]]
; CHECK-NEXT: [[TMP19:%.*]] = fadd <2 x double> [[TMP15]], [[TMP18]]
; CHECK-NEXT: store <2 x double> [[TMP11]], <2 x double>* [[TMP12]], align 8
; CHECK-NEXT: [[TMP20:%.*]] = bitcast double* [[RES_I_SROA_5_0_OUT2_I_SROA_IDX4]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP19]], <2 x double>* [[TMP20]], align 8
; CHECK-NEXT: [[RES_I_SROA_7_0_OUT2_I_SROA_IDX8:%.*]] = getelementptr inbounds double, double* [[OUT]], i64 4
; CHECK-NEXT: [[TMP21:%.*]] = insertelement <2 x double> poison, double [[TEMP10]], i32 0
; CHECK-NEXT: [[TMP22:%.*]] = insertelement <2 x double> [[TMP21]], double [[TEMP10]], i32 1
; CHECK-NEXT: [[TMP23:%.*]] = fmul <2 x double> [[TMP2]], [[TMP22]]
; CHECK-NEXT: [[TMP24:%.*]] = insertelement <2 x double> poison, double [[TEMP11]], i32 0
; CHECK-NEXT: [[TMP25:%.*]] = insertelement <2 x double> [[TMP24]], double [[TEMP11]], i32 1
; CHECK-NEXT: [[TMP26:%.*]] = fmul <2 x double> [[TMP7]], [[TMP25]]
; CHECK-NEXT: [[TMP27:%.*]] = fadd <2 x double> [[TMP23]], [[TMP26]]
; CHECK-NEXT: [[TMP28:%.*]] = bitcast double* [[RES_I_SROA_7_0_OUT2_I_SROA_IDX8]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP27]], <2 x double>* [[TMP28]], align 8
; CHECK-NEXT: [[RES_I_SROA_9_0_OUT2_I_SROA_IDX12:%.*]] = getelementptr inbounds double, double* [[OUT]], i64 6
; CHECK-NEXT: [[TMP29:%.*]] = fmul <2 x double> [[TMP14]], [[TMP22]]
; CHECK-NEXT: [[TMP30:%.*]] = fmul <2 x double> [[TMP17]], [[TMP25]]
; CHECK-NEXT: [[TMP31:%.*]] = fadd <2 x double> [[TMP29]], [[TMP30]]
; CHECK-NEXT: [[TMP32:%.*]] = bitcast double* [[RES_I_SROA_9_0_OUT2_I_SROA_IDX12]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP31]], <2 x double>* [[TMP32]], align 8
; CHECK-NEXT: ret void
;
%arrayidx1.i = getelementptr inbounds [2 x double], [2 x double]* %A, i64 0, i64 0
%temp = load double, double* %arrayidx1.i, align 8
%arrayidx3.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 0, i64 0
%temp1 = load double, double* %arrayidx3.i, align 8
%mul.i = fmul double %temp, %temp1
%arrayidx5.i = getelementptr inbounds [2 x double], [2 x double]* %A, i64 0, i64 1
%temp2 = load double, double* %arrayidx5.i, align 8
%arrayidx7.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 1, i64 0
%temp3 = load double, double* %arrayidx7.i, align 8
%mul8.i = fmul double %temp2, %temp3
%add.i = fadd double %mul.i, %mul8.i
%arrayidx13.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 0, i64 1
%temp4 = load double, double* %arrayidx13.i, align 8
%mul14.i = fmul double %temp, %temp4
%arrayidx18.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 1, i64 1
%temp5 = load double, double* %arrayidx18.i, align 8
%mul19.i = fmul double %temp2, %temp5
%add20.i = fadd double %mul14.i, %mul19.i
%arrayidx25.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 0, i64 2
%temp6 = load double, double* %arrayidx25.i, align 8
%mul26.i = fmul double %temp, %temp6
%arrayidx30.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 1, i64 2
%temp7 = load double, double* %arrayidx30.i, align 8
%mul31.i = fmul double %temp2, %temp7
%add32.i = fadd double %mul26.i, %mul31.i
%arrayidx37.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 0, i64 3
%temp8 = load double, double* %arrayidx37.i, align 8
%mul38.i = fmul double %temp, %temp8
%arrayidx42.i = getelementptr inbounds [4 x double], [4 x double]* %B, i64 1, i64 3
%temp9 = load double, double* %arrayidx42.i, align 8
%mul43.i = fmul double %temp2, %temp9
%add44.i = fadd double %mul38.i, %mul43.i
%arrayidx47.i = getelementptr inbounds [2 x double], [2 x double]* %A, i64 1, i64 0
%temp10 = load double, double* %arrayidx47.i, align 8
%mul50.i = fmul double %temp1, %temp10
%arrayidx52.i = getelementptr inbounds [2 x double], [2 x double]* %A, i64 1, i64 1
%temp11 = load double, double* %arrayidx52.i, align 8
%mul55.i = fmul double %temp3, %temp11
%add56.i = fadd double %mul50.i, %mul55.i
%mul62.i = fmul double %temp4, %temp10
%mul67.i = fmul double %temp5, %temp11
%add68.i = fadd double %mul62.i, %mul67.i
%mul74.i = fmul double %temp6, %temp10
%mul79.i = fmul double %temp7, %temp11
%add80.i = fadd double %mul74.i, %mul79.i
%mul86.i = fmul double %temp8, %temp10
%mul91.i = fmul double %temp9, %temp11
%add92.i = fadd double %mul86.i, %mul91.i
store double %add.i, double* %Out, align 8
%Res.i.sroa.4.0.Out2.i.sroa_idx2 = getelementptr inbounds double, double* %Out, i64 1
store double %add20.i, double* %Res.i.sroa.4.0.Out2.i.sroa_idx2, align 8
%Res.i.sroa.5.0.Out2.i.sroa_idx4 = getelementptr inbounds double, double* %Out, i64 2
store double %add32.i, double* %Res.i.sroa.5.0.Out2.i.sroa_idx4, align 8
%Res.i.sroa.6.0.Out2.i.sroa_idx6 = getelementptr inbounds double, double* %Out, i64 3
store double %add44.i, double* %Res.i.sroa.6.0.Out2.i.sroa_idx6, align 8
%Res.i.sroa.7.0.Out2.i.sroa_idx8 = getelementptr inbounds double, double* %Out, i64 4
store double %add56.i, double* %Res.i.sroa.7.0.Out2.i.sroa_idx8, align 8
%Res.i.sroa.8.0.Out2.i.sroa_idx10 = getelementptr inbounds double, double* %Out, i64 5
store double %add68.i, double* %Res.i.sroa.8.0.Out2.i.sroa_idx10, align 8
%Res.i.sroa.9.0.Out2.i.sroa_idx12 = getelementptr inbounds double, double* %Out, i64 6
store double %add80.i, double* %Res.i.sroa.9.0.Out2.i.sroa_idx12, align 8
%Res.i.sroa.10.0.Out2.i.sroa_idx14 = getelementptr inbounds double, double* %Out, i64 7
store double %add92.i, double* %Res.i.sroa.10.0.Out2.i.sroa_idx14, align 8
ret void
}
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