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[objc-arc] Updated ObjCARCContract to use ARCRuntimeEntryPoints.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185742 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-07-06 01:39:26 +00:00
parent 50951c7f79
commit 2e696cf61c
1 changed files with 11 additions and 99 deletions
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110
lib/Transforms/ObjCARC/ObjCARCContract.cpp
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@ -28,6 +28,7 @@
#define DEBUG_TYPE "objc-arc-contract"
#include "ObjCARC.h"
#include "ARCRuntimeEntryPoints.h"
#include "DependencyAnalysis.h"
#include "ProvenanceAnalysis.h"
#include "llvm/ADT/Statistic.h"
@ -52,23 +53,11 @@ namespace {
AliasAnalysis *AA;
DominatorTree *DT;
ProvenanceAnalysis PA;
ARCRuntimeEntryPoints EP;
/// A flag indicating whether this optimization pass should run.
bool Run;
/// Declarations for ObjC runtime functions, for use in creating calls to
/// them. These are initialized lazily to avoid cluttering up the Module
/// with unused declarations.
/// Declaration for objc_storeStrong().
Constant *StoreStrongCallee;
/// Declaration for objc_retainAutorelease().
Constant *RetainAutoreleaseCallee;
/// Declaration for objc_retainAutoreleaseReturnValue().
Constant *RetainAutoreleaseRVCallee;
/// Declaration for objc_retainAutoreleasedReturnValue().
Constant *RetainRVCallee;
/// The inline asm string to insert between calls and RetainRV calls to make
/// the optimization work on targets which need it.
const MDString *RetainRVMarker;
@ -78,11 +67,6 @@ namespace {
/// "tail".
SmallPtrSet<CallInst *, 8> StoreStrongCalls;
Constant *getStoreStrongCallee(Module *M);
Constant *getRetainRVCallee(Module *M);
Constant *getRetainAutoreleaseCallee(Module *M);
Constant *getRetainAutoreleaseRVCallee(Module *M);
bool OptimizeRetainCall(Function &F, Instruction *Retain);
bool ContractAutorelease(Function &F, Instruction *Autorelease,
@ -125,74 +109,6 @@ void ObjCARCContract::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
}
Constant *ObjCARCContract::getStoreStrongCallee(Module *M) {
if (!StoreStrongCallee) {
LLVMContext &C = M->getContext();
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
Type *I8XX = PointerType::getUnqual(I8X);
Type *Params[] = { I8XX, I8X };
AttributeSet Attr = AttributeSet()
.addAttribute(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind)
.addAttribute(M->getContext(), 1, Attribute::NoCapture);
StoreStrongCallee =
M->getOrInsertFunction(
"objc_storeStrong",
FunctionType::get(Type::getVoidTy(C), Params, /*isVarArg=*/false),
Attr);
}
return StoreStrongCallee;
}
Constant *ObjCARCContract::getRetainAutoreleaseCallee(Module *M) {
if (!RetainAutoreleaseCallee) {
LLVMContext &C = M->getContext();
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
Type *Params[] = { I8X };
FunctionType *FTy = FunctionType::get(I8X, Params, /*isVarArg=*/false);
AttributeSet Attribute =
AttributeSet().addAttribute(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
RetainAutoreleaseCallee =
M->getOrInsertFunction("objc_retainAutorelease", FTy, Attribute);
}
return RetainAutoreleaseCallee;
}
Constant *ObjCARCContract::getRetainAutoreleaseRVCallee(Module *M) {
if (!RetainAutoreleaseRVCallee) {
LLVMContext &C = M->getContext();
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
Type *Params[] = { I8X };
FunctionType *FTy = FunctionType::get(I8X, Params, /*isVarArg=*/false);
AttributeSet Attribute =
AttributeSet().addAttribute(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
RetainAutoreleaseRVCallee =
M->getOrInsertFunction("objc_retainAutoreleaseReturnValue", FTy,
Attribute);
}
return RetainAutoreleaseRVCallee;
}
Constant *ObjCARCContract::getRetainRVCallee(Module *M) {
if (!RetainRVCallee) {
LLVMContext &C = M->getContext();
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
Type *Params[] = { I8X };
FunctionType *FTy = FunctionType::get(I8X, Params, /*isVarArg=*/false);
AttributeSet Attribute =
AttributeSet().addAttribute(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
RetainRVCallee =
M->getOrInsertFunction("objc_retainAutoreleasedReturnValue", FTy,
Attribute);
}
return RetainRVCallee;
}
/// Turn objc_retain into objc_retainAutoreleasedReturnValue if the operand is a
/// return value. We do this late so we do not disrupt the dataflow analysis in
/// ObjCARCOpt.
@ -222,7 +138,8 @@ ObjCARCContract::OptimizeRetainCall(Function &F, Instruction *Retain) {
// We do not have to worry about tail calls/does not throw since
// retain/retainRV have the same properties.
cast<CallInst>(Retain)->setCalledFunction(getRetainRVCallee(F.getParent()));
Constant *Decl = EP.get(ARCRuntimeEntryPoints::EPT_RetainRV);
cast<CallInst>(Retain)->setCalledFunction(Decl);
DEBUG(dbgs() << "New: " << *Retain << "\n");
return true;
@ -272,10 +189,10 @@ ObjCARCContract::ContractAutorelease(Function &F, Instruction *Autorelease,
" Old Retain: "
<< *Retain << "\n");
if (Class == IC_AutoreleaseRV)
Retain->setCalledFunction(getRetainAutoreleaseRVCallee(F.getParent()));
else
Retain->setCalledFunction(getRetainAutoreleaseCallee(F.getParent()));
Constant *Decl = EP.get(Class == IC_AutoreleaseRV ?
ARCRuntimeEntryPoints::EPT_RetainAutoreleaseRV :
ARCRuntimeEntryPoints::EPT_RetainAutorelease);
Retain->setCalledFunction(Decl);
DEBUG(dbgs() << " New Retain: "
<< *Retain << "\n");
@ -356,9 +273,8 @@ void ObjCARCContract::ContractRelease(Instruction *Release,
Args[0] = new BitCastInst(Args[0], I8XX, "", Store);
if (Args[1]->getType() != I8X)
Args[1] = new BitCastInst(Args[1], I8X, "", Store);
CallInst *StoreStrong =
CallInst::Create(getStoreStrongCallee(BB->getParent()->getParent()),
Args, "", Store);
Constant *Decl = EP.get(ARCRuntimeEntryPoints::EPT_StoreStrong);
CallInst *StoreStrong = CallInst::Create(Decl, Args, "", Store);
StoreStrong->setDoesNotThrow();
StoreStrong->setDebugLoc(Store->getDebugLoc());
@ -381,11 +297,7 @@ bool ObjCARCContract::doInitialization(Module &M) {
if (!Run)
return false;
// These are initialized lazily.
StoreStrongCallee = 0;
RetainAutoreleaseCallee = 0;
RetainAutoreleaseRVCallee = 0;
RetainRVCallee = 0;
EP.Initialize(&M);
// Initialize RetainRVMarker.
RetainRVMarker = 0;