mirror of
https://github.com/c64scene-ar/llvm-6502.git
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369cc938d2
This is a complete re-write if the bottom-up vectorization class. Before this commit we scanned the instruction tree 3 times. First in search of merge points for the trees. Second, for estimating the cost. And finally for vectorization. There was a lot of code duplication and adding the DCE exposed bugs. The new design is simpler and DCE was a part of the design. In this implementation we build the tree once. After that we estimate the cost by scanning the different entries in the constructed tree (in any order). The vectorization phase also works on the built tree. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185774 91177308-0d34-0410-b5e6-96231b3b80d8
62 lines
2.1 KiB
LLVM
62 lines
2.1 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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; SLP vectorization example from http://cs.stanford.edu/people/eschkufz/research/asplos291-schkufza.pdf
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;CHECK: SAXPY
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;CHECK: mul <4 x i32>
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;CHECK: ret
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define void @SAXPY(i32* noalias nocapture %x, i32* noalias nocapture %y, i32 %a, i64 %i) {
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%1 = getelementptr inbounds i32* %x, i64 %i
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%2 = load i32* %1, align 4
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%3 = mul nsw i32 %2, %a
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%4 = getelementptr inbounds i32* %y, i64 %i
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%5 = load i32* %4, align 4
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%6 = add nsw i32 %3, %5
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store i32 %6, i32* %1, align 4
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%7 = add i64 %i, 1
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%8 = getelementptr inbounds i32* %x, i64 %7
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%9 = load i32* %8, align 4
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%10 = mul nsw i32 %9, %a
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%11 = getelementptr inbounds i32* %y, i64 %7
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%12 = load i32* %11, align 4
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%13 = add nsw i32 %10, %12
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store i32 %13, i32* %8, align 4
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%14 = add i64 %i, 2
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%15 = getelementptr inbounds i32* %x, i64 %14
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%16 = load i32* %15, align 4
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%17 = mul nsw i32 %16, %a
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%18 = getelementptr inbounds i32* %y, i64 %14
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%19 = load i32* %18, align 4
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%20 = add nsw i32 %17, %19
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store i32 %20, i32* %15, align 4
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%21 = add i64 %i, 3
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%22 = getelementptr inbounds i32* %x, i64 %21
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%23 = load i32* %22, align 4
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%24 = mul nsw i32 %23, %a
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%25 = getelementptr inbounds i32* %y, i64 %21
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%26 = load i32* %25, align 4
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%27 = add nsw i32 %24, %26
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store i32 %27, i32* %22, align 4
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ret void
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}
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; Make sure we don't crash on this one.
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define void @SAXPY_crash(i32* noalias nocapture %x, i32* noalias nocapture %y, i64 %i) {
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%1 = add i64 %i, 1
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%2 = getelementptr inbounds i32* %x, i64 %1
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%3 = getelementptr inbounds i32* %y, i64 %1
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%4 = load i32* %3, align 4
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%5 = add nsw i32 undef, %4
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store i32 %5, i32* %2, align 4
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%6 = add i64 %i, 2
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%7 = getelementptr inbounds i32* %x, i64 %6
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%8 = getelementptr inbounds i32* %y, i64 %6
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%9 = load i32* %8, align 4
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%10 = add nsw i32 undef, %9
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store i32 %10, i32* %7, align 4
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ret void
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}
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