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path: root/test/Transforms/SLPVectorizer/X86/saxpy.ll
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; RUN: opt < %s -basicaa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s

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"
target triple = "x86_64-apple-macosx10.8.0"

; SLP vectorization example from http://cs.stanford.edu/people/eschkufz/research/asplos291-schkufza.pdf
;CHECK: SAXPY
;CHECK: mul <4 x i32>
;CHECK: ret

define void @SAXPY(i32* noalias nocapture %x, i32* noalias nocapture %y, i32 %a, i64 %i) {
  %1 = getelementptr inbounds i32* %x, i64 %i
  %2 = load i32* %1, align 4
  %3 = mul nsw i32 %2, %a
  %4 = getelementptr inbounds i32* %y, i64 %i
  %5 = load i32* %4, align 4
  %6 = add nsw i32 %3, %5
  store i32 %6, i32* %1, align 4
  %7 = add i64 %i, 1
  %8 = getelementptr inbounds i32* %x, i64 %7
  %9 = load i32* %8, align 4
  %10 = mul nsw i32 %9, %a
  %11 = getelementptr inbounds i32* %y, i64 %7
  %12 = load i32* %11, align 4
  %13 = add nsw i32 %10, %12
  store i32 %13, i32* %8, align 4
  %14 = add i64 %i, 2
  %15 = getelementptr inbounds i32* %x, i64 %14
  %16 = load i32* %15, align 4
  %17 = mul nsw i32 %16, %a
  %18 = getelementptr inbounds i32* %y, i64 %14
  %19 = load i32* %18, align 4
  %20 = add nsw i32 %17, %19
  store i32 %20, i32* %15, align 4
  %21 = add i64 %i, 3
  %22 = getelementptr inbounds i32* %x, i64 %21
  %23 = load i32* %22, align 4
  %24 = mul nsw i32 %23, %a
  %25 = getelementptr inbounds i32* %y, i64 %21
  %26 = load i32* %25, align 4
  %27 = add nsw i32 %24, %26
  store i32 %27, i32* %22, align 4
  ret void
}