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fix a warning in TinyPtrVector, adopt it in SSAUpdater, saving some

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mallocs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135366 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2011-07-18 01:43:58 +00:00
parent 9d69d4aadd
commit 840635741f
2 changed files with 4 additions and 4 deletions
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6
lib/Transforms/Utils/SSAUpdater.cpp
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@@ -16,6 +16,7 @@
#include "llvm/Instructions.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/TinyPtrVector.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Support/AlignOf.h"
#include "llvm/Support/Allocator.h"
@@ -378,8 +379,7 @@ run(const SmallVectorImpl<Instruction*> &Insts) const {
// First step: bucket up uses of the alloca by the block they occur in.
// This is important because we have to handle multiple defs/uses in a block
// ourselves: SSAUpdater is purely for cross-block references.
// FIXME: Want a TinyVector<Instruction*> since there is often 0/1 element.
DenseMap<BasicBlock*, std::vector<Instruction*> > UsesByBlock;
DenseMap<BasicBlock*, TinyPtrVector<Instruction*> > UsesByBlock;
for (unsigned i = 0, e = Insts.size(); i != e; ++i) {
Instruction *User = Insts[i];
@@ -395,7 +395,7 @@ run(const SmallVectorImpl<Instruction*> &Insts) const {
for (unsigned i = 0, e = Insts.size(); i != e; ++i) {
Instruction *User = Insts[i];
BasicBlock *BB = User->getParent();
std::vector<Instruction*> &BlockUses = UsesByBlock[BB];
TinyPtrVector<Instruction*> &BlockUses = UsesByBlock[BB];
// If this block has already been processed, ignore this repeat use.
if (BlockUses.empty()) continue;