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[C++11] Remove the completely unnecessary requirement on SetVector's

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remove_if that its predicate is adaptable. We don't actually need this,
we can write a generic adapter for any predicate.

This lets us remove some very wrong std::function usages. We should
never be using std::function for predicates to algorithms. This incurs
an *indirect* call overhead for every evaluation of the predicate, and
makes it very hard to inline through.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202742 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2014-03-03 19:28:52 +00:00
parent 6f8c0c0613
commit 0550e93e89
3 changed files with 5 additions and 7 deletions
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5
include/llvm/ADT/SetVector.h
View File

@ -195,11 +195,10 @@ private:
set_type &set_;
public:
typedef typename UnaryPredicate::argument_type argument_type;
TestAndEraseFromSet(UnaryPredicate P, set_type &set_) : P(P), set_(set_) {}
bool operator()(argument_type Arg) {
template <typename ArgumentT>
bool operator()(const ArgumentT &Arg) {
if (P(Arg)) {
set_.erase(Arg);
return true;

5
lib/Transforms/Scalar/DeadStoreElimination.cpp
View File

@ -803,14 +803,13 @@ bool DSE::handleEndBlock(BasicBlock &BB) {
// If the call might load from any of our allocas, then any store above
// the call is live.
std::function<bool(Value *)> Pred = [&](Value *I) {
DeadStackObjects.remove_if([&](Value *I) {
// See if the call site touches the value.
AliasAnalysis::ModRefResult A =
AA->getModRefInfo(CS, I, getPointerSize(I, *AA));
return A == AliasAnalysis::ModRef || A == AliasAnalysis::Ref;
};
DeadStackObjects.remove_if(Pred);
});
// If all of the allocas were clobbered by the call then we're not going
// to find anything else to process.

2
lib/Transforms/Scalar/SROA.cpp
View File

@ -3640,7 +3640,7 @@ bool SROA::runOnFunction(Function &F) {
// Remove the deleted allocas from various lists so that we don't try to
// continue processing them.
if (!DeletedAllocas.empty()) {
std::function<bool(AllocaInst *)> IsInSet = [&](AllocaInst *AI) {
auto IsInSet = [&](AllocaInst *AI) {
return DeletedAllocas.count(AI);
};
Worklist.remove_if(IsInSet);