mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-29 10:32:47 +00:00
b4b54153ad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146412 91177308-0d34-0410-b5e6-96231b3b80d8
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
//=- HexagonRemoveExtendArgs.cpp - Remove unecessary argument sign extends --=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Pass that removes sign extends for function parameters. These parameters
|
|
// are already sign extended by the caller per Hexagon's ABI
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/Instructions.h"
|
|
#include "llvm/Transforms/Scalar.h"
|
|
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
|
|
#include "HexagonTargetMachine.h"
|
|
#include <iostream>
|
|
|
|
using namespace llvm;
|
|
namespace {
|
|
struct HexagonRemoveExtendArgs : public FunctionPass {
|
|
public:
|
|
static char ID;
|
|
HexagonRemoveExtendArgs() : FunctionPass(ID) {}
|
|
virtual bool runOnFunction(Function &F);
|
|
|
|
const char *getPassName() const {
|
|
return "Remove sign extends";
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequired<MachineFunctionAnalysis>();
|
|
AU.addPreserved<MachineFunctionAnalysis>();
|
|
FunctionPass::getAnalysisUsage(AU);
|
|
}
|
|
};
|
|
}
|
|
|
|
char HexagonRemoveExtendArgs::ID = 0;
|
|
RegisterPass<HexagonRemoveExtendArgs> X("reargs",
|
|
"Remove Sign and Zero Extends for Args"
|
|
);
|
|
|
|
|
|
|
|
bool HexagonRemoveExtendArgs::runOnFunction(Function &F) {
|
|
unsigned Idx = 1;
|
|
for (Function::arg_iterator AI = F.arg_begin(), AE = F.arg_end(); AI != AE;
|
|
++AI, ++Idx) {
|
|
if (F.paramHasAttr(Idx, Attribute::SExt)) {
|
|
Argument* Arg = AI;
|
|
if (!isa<PointerType>(Arg->getType())) {
|
|
for (Instruction::use_iterator UI = Arg->use_begin();
|
|
UI != Arg->use_end();) {
|
|
if (isa<SExtInst>(*UI)) {
|
|
Instruction* Use = cast<Instruction>(*UI);
|
|
SExtInst* SI = new SExtInst(Arg, Use->getType());
|
|
assert (EVT::getEVT(SI->getType()) ==
|
|
(EVT::getEVT(Use->getType())));
|
|
++UI;
|
|
Use->replaceAllUsesWith(SI);
|
|
Instruction* First = F.getEntryBlock().begin();
|
|
SI->insertBefore(First);
|
|
Use->eraseFromParent();
|
|
} else {
|
|
++UI;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
FunctionPass *llvm::createHexagonRemoveExtendOps(HexagonTargetMachine &TM) {
|
|
return new HexagonRemoveExtendArgs();
|
|
}
|