maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Eliminate some temporaries. 

llvm-svn: 85896
This commit is contained in:
Benjamin Kramer 2009-11-03 12:52:50 +00:00
parent 27fee83ec4
commit 5573971453
1 changed files with 11 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
llvm/lib/Transforms/IPO/LowerSetJmp.cpp
View File

@ -47,9 +47,6 @@
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/VectorExtras.h"
#include "llvm/ADT/SmallVector.h"
#include <map>
using namespace llvm;
@ -108,7 +105,7 @@ namespace {
void TransformLongJmpCall(CallInst* Inst);
void TransformSetJmpCall(CallInst* Inst);
bool IsTransformableFunction(const std::string& Name);
bool IsTransformableFunction(StringRef Name);
public:
static char ID; // Pass identification, replacement for typeid
LowerSetJmp() : ModulePass(&ID) {}
@ -249,13 +246,8 @@ bool LowerSetJmp::doInitialization(Module& M)
// "llvm.{setjmp,longjmp}" functions and none of the setjmp/longjmp error
// handling functions (beginning with __llvm_sjljeh_...they don't throw
// exceptions).
bool LowerSetJmp::IsTransformableFunction(const std::string& Name) {
std::string SJLJEh("__llvm_sjljeh");
if (Name.size() > SJLJEh.size())
return std::string(Name.begin(), Name.begin() + SJLJEh.size()) != SJLJEh;
return true;
bool LowerSetJmp::IsTransformableFunction(StringRef Name) {
return !Name.startswith("__llvm_sjljeh_");
}
// TransformLongJmpCall - Transform a longjmp call into a call to the
@ -263,8 +255,7 @@ bool LowerSetJmp::IsTransformableFunction(const std::string& Name) {
// throwing the exception for us.
void LowerSetJmp::TransformLongJmpCall(CallInst* Inst)
{
const Type* SBPTy =
Type::getInt8PtrTy(Inst->getContext());
const Type* SBPTy = Type::getInt8PtrTy(Inst->getContext());
// Create the call to "__llvm_sjljeh_throw_longjmp". This takes the
// same parameters as "longjmp", except that the buffer is cast to a
@ -272,10 +263,8 @@ void LowerSetJmp::TransformLongJmpCall(CallInst* Inst)
// Inst's uses and doesn't get a name.
CastInst* CI =
new BitCastInst(Inst->getOperand(1), SBPTy, "LJBuf", Inst);
SmallVector<Value *, 2> Args;
Args.push_back(CI);
Args.push_back(Inst->getOperand(2));
CallInst::Create(ThrowLongJmp, Args.begin(), Args.end(), "", Inst);
Value *Args[] = { CI, Inst->getOperand(2) };
CallInst::Create(ThrowLongJmp, Args, Args + 2, "", Inst);
SwitchValuePair& SVP = SwitchValMap[Inst->getParent()->getParent()];
@ -390,11 +379,11 @@ void LowerSetJmp::TransformSetJmpCall(CallInst* Inst)
Type::getInt8PtrTy(Inst->getContext());
CastInst* BufPtr =
new BitCastInst(Inst->getOperand(1), SBPTy, "SBJmpBuf", Inst);
std::vector<Value*> Args =
make_vector<Value*>(GetSetJmpMap(Func), BufPtr,
ConstantInt::get(Type::getInt32Ty(Inst->getContext()),
SetJmpIDMap[Func]++), 0);
CallInst::Create(AddSJToMap, Args.begin(), Args.end(), "", Inst);
Value *Args[] = {
GetSetJmpMap(Func), BufPtr,
ConstantInt::get(Type::getInt32Ty(Inst->getContext()), SetJmpIDMap[Func]++)
};
CallInst::Create(AddSJToMap, Args, Args + 3, "", Inst);
// We are guaranteed that there are no values live across basic blocks
// (because we are "not in SSA form" yet), but there can still be values live