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Factor out calls to AA.getDataLayout().

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202157 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2014-02-25 15:52:19 +00:00
parent 37ecf69cbf
commit 53eeb678ea
1 changed files with 6 additions and 8 deletions
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14
lib/Transforms/Scalar/DeadStoreElimination.cpp
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@ -193,6 +193,7 @@ static bool hasMemoryWrite(Instruction *I, const TargetLibraryInfo *TLI) {
/// describe the memory operations for this instruction.
static AliasAnalysis::Location
getLocForWrite(Instruction *Inst, AliasAnalysis &AA) {
const DataLayout *DL = AA.getDataLayout();
if (StoreInst *SI = dyn_cast<StoreInst>(Inst))
return AA.getLocation(SI);
@ -202,7 +203,7 @@ getLocForWrite(Instruction *Inst, AliasAnalysis &AA) {
// If we don't have target data around, an unknown size in Location means
// that we should use the size of the pointee type. This isn't valid for
// memset/memcpy, which writes more than an i8.
if (Loc.Size == AliasAnalysis::UnknownSize && AA.getDataLayout() == 0)
if (Loc.Size == AliasAnalysis::UnknownSize && DL == 0)
return AliasAnalysis::Location();
return Loc;
}
@ -216,7 +217,7 @@ getLocForWrite(Instruction *Inst, AliasAnalysis &AA) {
// If we don't have target data around, an unknown size in Location means
// that we should use the size of the pointee type. This isn't valid for
// init.trampoline, which writes more than an i8.
if (AA.getDataLayout() == 0) return AliasAnalysis::Location();
if (DL == 0) return AliasAnalysis::Location();
// FIXME: We don't know the size of the trampoline, so we can't really
// handle it here.
@ -344,6 +345,7 @@ static OverwriteResult isOverwrite(const AliasAnalysis::Location &Later,
AliasAnalysis &AA,
int64_t &EarlierOff,
int64_t &LaterOff) {
const DataLayout *DL = AA.getDataLayout();
const Value *P1 = Earlier.Ptr->stripPointerCasts();
const Value *P2 = Later.Ptr->stripPointerCasts();
@ -357,8 +359,7 @@ static OverwriteResult isOverwrite(const AliasAnalysis::Location &Later,
// If we have no DataLayout information around, then the size of the store
// is inferrable from the pointee type. If they are the same type, then
// we know that the store is safe.
if (AA.getDataLayout() == 0 &&
Later.Ptr->getType() == Earlier.Ptr->getType())
if (DL == 0 && Later.Ptr->getType() == Earlier.Ptr->getType())
return OverwriteComplete;
return OverwriteUnknown;
@ -372,15 +373,12 @@ static OverwriteResult isOverwrite(const AliasAnalysis::Location &Later,
// Otherwise, we have to have size information, and the later store has to be
// larger than the earlier one.
if (Later.Size == AliasAnalysis::UnknownSize ||
Earlier.Size == AliasAnalysis::UnknownSize ||
AA.getDataLayout() == 0)
Earlier.Size == AliasAnalysis::UnknownSize || DL == 0)
return OverwriteUnknown;
// Check to see if the later store is to the entire object (either a global,
// an alloca, or a byval/inalloca argument). If so, then it clearly
// overwrites any other store to the same object.
const DataLayout *DL = AA.getDataLayout();
const Value *UO1 = GetUnderlyingObject(P1, DL),
*UO2 = GetUnderlyingObject(P2, DL);