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https://github.com/c64scene-ar/llvm-6502.git
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25961b469a
Untill now we detected the vectorizable tree and evaluated the cost of the entire tree. With this patch we can decide to trim-out branches of the tree that are not profitable to vectorizer. Also, increase the max depth from 6 to 12. In the worse possible case where all of the code is made of diamond-shaped graph this can bring the cost to 2**10, but diamonds are not very common. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184681 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.8 KiB
LLVM
47 lines
1.8 KiB
LLVM
; RUN: opt < %s -basicaa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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; CHECK: test
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; CHECK: sitofp i8
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; CHECK-NEXT: sitofp i8
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: fmul <2 x double>
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; CHECK: ret
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define i32 @test(double* nocapture %A, i8* nocapture %B) {
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entry:
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%0 = load i8* %B, align 1
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%arrayidx1 = getelementptr inbounds i8* %B, i64 1
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%1 = load i8* %arrayidx1, align 1
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%add = add i8 %0, 3
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%add4 = add i8 %1, 3
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%conv6 = sitofp i8 %add to double
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%conv7 = sitofp i8 %add4 to double ; <--- This is inefficient. The chain stops here.
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%mul = fmul double %conv6, %conv6
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%add8 = fadd double %mul, 1.000000e+00
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%mul9 = fmul double %conv7, %conv7
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%add10 = fadd double %mul9, 1.000000e+00
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%mul11 = fmul double %add8, %add8
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%add12 = fadd double %mul11, 1.000000e+00
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%mul13 = fmul double %add10, %add10
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%add14 = fadd double %mul13, 1.000000e+00
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%mul15 = fmul double %add12, %add12
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%add16 = fadd double %mul15, 1.000000e+00
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%mul17 = fmul double %add14, %add14
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%add18 = fadd double %mul17, 1.000000e+00
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%mul19 = fmul double %add16, %add16
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%add20 = fadd double %mul19, 1.000000e+00
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%mul21 = fmul double %add18, %add18
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%add22 = fadd double %mul21, 1.000000e+00
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%mul23 = fmul double %add20, %add20
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%add24 = fadd double %mul23, 1.000000e+00
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%mul25 = fmul double %add22, %add22
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%add26 = fadd double %mul25, 1.000000e+00
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store double %add24, double* %A, align 8
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%arrayidx28 = getelementptr inbounds double* %A, i64 1
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store double %add26, double* %arrayidx28, align 8
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ret i32 undef
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}
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