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Avoid vectorization when the function has the "noimplicitflot" attribute.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171429 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2013-01-02 23:54:43 +00:00
parent 82de10a34c
commit 00a6bcaeb4
2 changed files with 40 additions and 3 deletions
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14
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -94,9 +94,17 @@ struct LoopVectorize : public LoopPass {
// Check the function attribues to find out if this function should be
// optimized for size.
Function *F = L->getHeader()->getParent();
Attribute::AttrKind SzAttr= Attribute::OptimizeForSize;
bool OptForSize =
F->getAttributes().hasAttribute(AttributeSet::FunctionIndex, SzAttr);
Attribute::AttrKind SzAttr = Attribute::OptimizeForSize;
Attribute::AttrKind FlAttr = Attribute::NoImplicitFloat;
unsigned FnIndex = AttributeSet::FunctionIndex;
bool OptForSize = F->getAttributes().hasAttribute(FnIndex, SzAttr);
bool NoFloat = F->getAttributes().hasAttribute(FnIndex, FlAttr);
if (NoFloat) {
DEBUG(dbgs() << "LV: Can't vectorize when the NoImplicitFloat"
"attribute is used.\n");
return false;
}
unsigned VF = CM.selectVectorizationFactor(OptForSize, VectorizationFactor);

29
test/Transforms/LoopVectorize/nofloat.ll Normal file
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@ -0,0 +1,29 @@
; RUN: opt < %s -loop-vectorize -force-vector-width=4 -dce -instcombine -licm -S | FileCheck %s
; Make sure that we don't vectorize functions with 'noimplicitfloat' attributes.
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"
@a = common global [2048 x i32] zeroinitializer, align 16
;CHECK: @example12
;CHECK-NOT: store <4 x i32>
;CHECK: ret void
define void @example12() noimplicitfloat { ; <--------- "noimplicitfloat" attribute here!
br label %1
; <label>:1 ; preds = %1, %0
%indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ]
%2 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv
%3 = trunc i64 %indvars.iv to i32
store i32 %3, i32* %2, align 4
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 1024
br i1 %exitcond, label %4, label %1
; <label>:4 ; preds = %1
ret void
}