//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "reg2mem"
#include "llvm/Transforms/Scalar.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/CFG.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Pass.h"
-#include "llvm/Support/CFG.h"
#include "llvm/Transforms/Utils/Local.h"
#include <list>
using namespace llvm;
+#define DEBUG_TYPE "reg2mem"
+
STATISTIC(NumRegsDemoted, "Number of registers demoted");
STATISTIC(NumPhisDemoted, "Number of phi-nodes demoted");
initializeRegToMemPass(*PassRegistry::getPassRegistry());
}
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequiredID(BreakCriticalEdgesID);
AU.addPreservedID(BreakCriticalEdgesID);
}
- bool valueEscapes(const Instruction *Inst) const {
- const BasicBlock *BB = Inst->getParent();
- for (Value::const_use_iterator UI = Inst->use_begin(),E = Inst->use_end();
- UI != E; ++UI) {
- const Instruction *I = cast<Instruction>(*UI);
- if (I->getParent() != BB || isa<PHINode>(I))
+ bool valueEscapes(const Instruction *Inst) const {
+ const BasicBlock *BB = Inst->getParent();
+ for (const User *U : Inst->users()) {
+ const Instruction *UI = cast<Instruction>(U);
+ if (UI->getParent() != BB || isa<PHINode>(UI))
return true;
}
return false;
}
- virtual bool runOnFunction(Function &F);
+ bool runOnFunction(Function &F) override;
};
}
// Insert all new allocas into entry block.
BasicBlock *BBEntry = &F.getEntryBlock();
- assert(pred_begin(BBEntry) == pred_end(BBEntry) &&
+ assert(pred_empty(BBEntry) &&
"Entry block to function must not have predecessors!");
// Find first non-alloca instruction and create insertion point. This is
BasicBlock::iterator I = BBEntry->begin();
while (isa<AllocaInst>(I)) ++I;
- CastInst *AllocaInsertionPoint =
- new BitCastInst(Constant::getNullValue(Type::getInt32Ty(F.getContext())),
- Type::getInt32Ty(F.getContext()),
- "reg2mem alloca point", I);
+ CastInst *AllocaInsertionPoint = new BitCastInst(
+ Constant::getNullValue(Type::getInt32Ty(F.getContext())),
+ Type::getInt32Ty(F.getContext()), "reg2mem alloca point", &*I);
// Find the escaped instructions. But don't create stack slots for
// allocas in entry block.
for (BasicBlock::iterator iib = ibb->begin(), iie = ibb->end();
iib != iie; ++iib) {
if (!(isa<AllocaInst>(iib) && iib->getParent() == BBEntry) &&
- valueEscapes(iib)) {
+ valueEscapes(&*iib)) {
WorkList.push_front(&*iib);
}
}