llvm-6502/lib/Target/NVPTX/NVPTXAllocaHoisting.cpp
Joel Jones 703360f93c Fix typos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157752 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-31 17:11:25 +00:00

49 lines
1.6 KiB
C++

//===-- AllocaHoisting.cpp - Hoist allocas to the entry block --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Hoist the alloca instructions in the non-entry blocks to the entry blocks.
//
//===----------------------------------------------------------------------===//
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/Constants.h"
#include "NVPTXAllocaHoisting.h"
namespace llvm {
bool NVPTXAllocaHoisting::runOnFunction(Function &function) {
bool functionModified = false;
Function::iterator I = function.begin();
TerminatorInst *firstTerminatorInst = (I++)->getTerminator();
for (Function::iterator E = function.end(); I != E; ++I) {
for (BasicBlock::iterator BI = I->begin(), BE = I->end(); BI != BE;) {
AllocaInst *allocaInst = dyn_cast<AllocaInst>(BI++);
if (allocaInst && isa<ConstantInt>(allocaInst->getArraySize())) {
allocaInst->moveBefore(firstTerminatorInst);
functionModified = true;
}
}
}
return functionModified;
}
char NVPTXAllocaHoisting::ID = 1;
RegisterPass<NVPTXAllocaHoisting> X("alloca-hoisting",
"Hoisting alloca instructions in non-entry "
"blocks to the entry block");
FunctionPass *createAllocaHoisting() {
return new NVPTXAllocaHoisting();
}
} // end namespace llvm