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Do not introduce vector operations in functions marked with noimplicitfloat.

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<rdar://problem/12879313>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170630 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2012-12-20 01:36:20 +00:00
parent 46367768f7
commit 99d8e76d44
2 changed files with 22 additions and 2 deletions
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7
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -25,6 +25,7 @@
#include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineFunction.h"
#include "llvm/DataLayout.h" #include "llvm/DataLayout.h"
#include "llvm/DerivedTypes.h" #include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/LLVMContext.h" #include "llvm/LLVMContext.h"
#include "llvm/Support/CommandLine.h" #include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h" #include "llvm/Support/Debug.h"
@ -7748,8 +7749,10 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode* St) {
LastLegalVectorType = i + 1; LastLegalVectorType = i + 1;
} }
// We only use vectors if the constant is known to be zero. // We only use vectors if the constant is known to be zero and the
if (NonZero) // function is not marked with the noimplicitfloat attribute.
if (NonZero || (DAG.getMachineFunction().getFunction()->getFnAttributes().
hasAttribute(Attribute::NoImplicitFloat)))
LastLegalVectorType = 0; LastLegalVectorType = 0;
// Check if we found a legal integer type to store. // Check if we found a legal integer type to store.

17
test/CodeGen/X86/2012-12-19-NoImplicitFloat.ll Normal file
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@ -0,0 +1,17 @@
; RUN: llc -mtriple=x86_64-apple-macosx10.8.0 -mcpu=core2 < %s | FileCheck %s
; Test that we do not introduce vector operations with noimplicitfloat.
; rdar://12879313
%struct1 = type { i32*, i32* }
define void @test() nounwind noimplicitfloat {
entry:
; CHECK-NOT: xmm
; CHECK: ret
%0 = load %struct1** undef, align 8
%1 = getelementptr inbounds %struct1* %0, i64 0, i32 0
store i32* null, i32** %1, align 8
%2 = getelementptr inbounds %struct1* %0, i64 0, i32 1
store i32* null, i32** %2, align 8
ret void
}