31eaf86a1e
This improves overall analysis for minbitwidth in SLP. It allows to
analyze the trees with store/insertelement root nodes. Also, instead of
using single minbitwidth, detected from the very first analysis stage,
it tries to detect the best one for each trunc/ext subtree in the graph
and use it for the subtree.
Results in better code and less vector register pressure.
Metric: size..text
Program size..text
results results0 diff
test-suite :: SingleSource/Benchmarks/Adobe-C++/simple_types_loop_invariant.test 92549.00 92609.00 0.1%
test-suite :: External/SPEC/CINT2017speed/625.x264_s/625.x264_s.test 663381.00 663493.00 0.0%
test-suite :: External/SPEC/CINT2017rate/525.x264_r/525.x264_r.test 663381.00 663493.00 0.0%
test-suite :: MultiSource/Benchmarks/Bullet/bullet.test 307182.00 307214.00 0.0%
test-suite :: External/SPEC/CFP2017speed/638.imagick_s/638.imagick_s.test 1394420.00 1394484.00 0.0%
test-suite :: External/SPEC/CFP2017rate/538.imagick_r/538.imagick_r.test 1394420.00 1394484.00 0.0%
test-suite :: External/SPEC/CFP2017rate/510.parest_r/510.parest_r.test 2040257.00 2040273.00 0.0%
test-suite :: External/SPEC/CFP2017rate/526.blender_r/526.blender_r.test 12396098.00 12395858.00 -0.0%
test-suite :: External/SPEC/CINT2006/445.gobmk/445.gobmk.test 909944.00 909768.00 -0.0%
SingleSource/Benchmarks/Adobe-C++/simple_types_loop_invariant - 4 scalar
instructions remain scalar (good).
Spec2017/x264 - the whole function idct4x4dc is vectorized using <16
x i16> instead of <16 x i32>, also zext/trunc are removed. In other
places last vector zext/sext removed and replaced by
extractelement + scalar zext/sext pair.
MultiSource/Benchmarks/Bullet/bullet - reduce or <4 x i32> replaced by
reduce or <4 x i8>
Spec2017/imagick - Removed extra zext from 2 packs of the operations.
Spec2017/parest - Removed extra zext, replaced by extractelement+scalar
zext
Spec2017/blender - the whole bunch of vector zext/sext replaced by
extractelement+scalar zext/sext, some extra code vectorized in smaller
types.
Spec2006/gobmk - fixed cost estimation, some small code remains scalar.
Original Pull Request: https://github.com/llvm/llvm-project/pull/84334
The patch has the same functionality (no test changes, no changes in
benchmarks) as the original patch, just has some compile time
improvements + fixes for xxhash unittest, discovered earlier in the
previous version of the patch.
Reviewers:
Pull Request: https://github.com/llvm/llvm-project/pull/84536
36 lines
1.6 KiB
LLVM
36 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -passes=slp-vectorizer -S -slp-threshold=-10 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
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define void @test(i8 %0) {
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; CHECK-LABEL: define void @test(
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; CHECK-SAME: i8 [[TMP0:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x i8> <i8 0, i8 poison>, i8 [[TMP0]], i32 1
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; CHECK-NEXT: [[TMP2:%.*]] = sext <2 x i8> [[TMP1]] to <2 x i32>
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; CHECK-NEXT: [[TMP3:%.*]] = mul <2 x i8> [[TMP1]], zeroinitializer
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; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x i8> [[TMP3]], i32 0
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; CHECK-NEXT: [[TMP5:%.*]] = zext i8 [[TMP4]] to i32
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; CHECK-NEXT: [[TMP6:%.*]] = extractelement <2 x i8> [[TMP3]], i32 1
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; CHECK-NEXT: [[TMP7:%.*]] = zext i8 [[TMP6]] to i32
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; CHECK-NEXT: [[ADD:%.*]] = or i32 [[TMP5]], [[TMP7]]
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; CHECK-NEXT: [[SHR:%.*]] = lshr i32 [[ADD]], 1
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; CHECK-NEXT: [[CONV9:%.*]] = trunc i32 [[SHR]] to i8
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; CHECK-NEXT: store i8 [[CONV9]], ptr null, align 1
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; CHECK-NEXT: [[TMP8:%.*]] = shufflevector <2 x i32> [[TMP2]], <2 x i32> poison, <8 x i32> <i32 1, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
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; CHECK-NEXT: ret void
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;
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entry:
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%conv3 = sext i8 %0 to i32
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%conv7 = sext i8 0 to i32
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%conv = zext i16 0 to i32
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%mul = mul i32 %conv3, %conv
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%conv6 = zext i16 0 to i32
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%mul8 = mul i32 %conv7, %conv6
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%add = or i32 %mul8, %mul
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%shr = lshr i32 %add, 1
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%conv9 = trunc i32 %shr to i8
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store i8 %conv9, ptr null, align 1
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%broadcast.splatinsert = insertelement <8 x i32> poison, i32 %conv3, i64 0
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ret void
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}
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