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Finegrainify namespacification

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Reorder #includes
Implement: IndVarsSimplify/2003-12-10-IndVarDeadCode.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10376 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-12-10 18:06:47 +00:00
parent 01b2d61311
commit ba4f3f6a41
1 changed files with 27 additions and 8 deletions
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35
lib/Transforms/Scalar/IndVarSimplify.cpp
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@ -15,18 +15,18 @@
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
#include "llvm/Transforms/Scalar.h" #include "llvm/Transforms/Scalar.h"
#include "llvm/Analysis/InductionVariable.h" #include "llvm/Constants.h"
#include "llvm/Analysis/LoopInfo.h" #include "llvm/Type.h"
#include "llvm/iPHINode.h" #include "llvm/iPHINode.h"
#include "llvm/iOther.h" #include "llvm/iOther.h"
#include "llvm/Type.h" #include "llvm/Analysis/InductionVariable.h"
#include "llvm/Constants.h" #include "llvm/Analysis/LoopInfo.h"
#include "llvm/Support/CFG.h" #include "llvm/Support/CFG.h"
#include "llvm/Transforms/Utils/Local.h"
#include "Support/Debug.h" #include "Support/Debug.h"
#include "Support/Statistic.h" #include "Support/Statistic.h"
#include "Support/STLExtras.h" #include "Support/STLExtras.h"
using namespace llvm;
namespace llvm {
namespace { namespace {
Statistic<> NumRemoved ("indvars", "Number of aux indvars removed"); Statistic<> NumRemoved ("indvars", "Number of aux indvars removed");
@ -185,8 +185,28 @@ static bool TransformLoop(LoopInfo *Loops, Loop *Loop) {
IV->Phi->setName(""); IV->Phi->setName("");
Val->setName(OldName); Val->setName(OldName);
// Get the incoming values used by the PHI node
std::vector<Value*> PHIOps;
PHIOps.reserve(IV->Phi->getNumIncomingValues());
for (unsigned i = 0, e = IV->Phi->getNumIncomingValues(); i != e; ++i)
PHIOps.push_back(IV->Phi->getIncomingValue(i));
// Delete the old, now unused, phi node... // Delete the old, now unused, phi node...
Header->getInstList().erase(IV->Phi); Header->getInstList().erase(IV->Phi);
// If the PHI is the last user of any instructions for computing PHI nodes
// that are irrelevant now, delete those instructions.
while (!PHIOps.empty()) {
Instruction *MaybeDead = dyn_cast<Instruction>(PHIOps.back());
PHIOps.pop_back();
if (MaybeDead && isInstructionTriviallyDead(MaybeDead)) {
PHIOps.insert(PHIOps.end(), MaybeDead->op_begin(),
MaybeDead->op_end());
MaybeDead->getParent()->getInstList().erase(MaybeDead);
}
}
Changed = true; Changed = true;
++NumRemoved; ++NumRemoved;
} }
@ -216,8 +236,7 @@ namespace {
"Canonicalize Induction Variables"); "Canonicalize Induction Variables");
} }
Pass *createIndVarSimplifyPass() { Pass *llvm::createIndVarSimplifyPass() {
return new InductionVariableSimplify(); return new InductionVariableSimplify();
} }
} // End llvm namespace