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b89304eb7c
The SLP vectorizer should propagate IR-level optimization hints/flags (nsw, nuw, exact, fast-math) when converting scalar instructions into vectors. But this isn't a simple copy - we need to take the intersection (the logical 'and') of the sets of flags on the scalars. The solution is further complicated because we can have non-uniform (non-SIMD) vector ops after: http://reviews.llvm.org/D4015 http://llvm.org/viewvc/llvm-project?view=revision&revision=211339 The vast majority of changed files are existing tests that were not propagating IR flags, but I've also added a new test file for focused testing of IR flag possibilities. Differential Revision: http://reviews.llvm.org/D5172 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217051 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 nsw <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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