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Introduce a helper to combine instruction metadata.

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Replace the old code in GVN and BBVectorize with it. Update SimplifyCFG to use
it.

Patch by Björn Steinbrink!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215723 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-08-15 15:46:38 +00:00
parent f36437d945
commit d37ec47374
5 changed files with 74 additions and 74 deletions
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8
lib/Transforms/Utils/SimplifyCFG.cpp
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@ -43,6 +43,7 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Local.h"
#include <algorithm>
#include <map>
#include <set>
@ -1040,6 +1041,13 @@ static bool HoistThenElseCodeToIf(BranchInst *BI, const DataLayout *DL) {
if (!I2->use_empty())
I2->replaceAllUsesWith(I1);
I1->intersectOptionalDataWith(I2);
unsigned KnownIDs[] = {
LLVMContext::MD_tbaa,
LLVMContext::MD_range,
LLVMContext::MD_fpmath,
LLVMContext::MD_invariant_load
};
combineMetadata(I1, I2, KnownIDs);
I2->eraseFromParent();
Changed = true;