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authorJohn McCall <rjmccall@apple.com>2013-02-28 19:01:20 +0000
committerJohn McCall <rjmccall@apple.com>2013-02-28 19:01:20 +0000
commitbd7370a78604e9a20d698bfe328c1e43f12a0613 (patch)
tree4284f2da0de9b36088c1a2c2ebac23c81a221792 /lib/CodeGen/CGObjC.cpp
parent280b956c8ead04adaa08b271cd93f7e49ca7eb3b (diff)
Use the actual ABI-determined C calling convention for runtime
calls and declarations. LLVM has a default CC determined by the target triple. This is not always the actual default CC for the ABI we've been asked to target, and so we sometimes find ourselves annotating all user functions with an explicit calling convention. Since these calling conventions usually agree for the simple set of argument types passed to most runtime functions, using the LLVM-default CC in principle has no effect. However, the LLVM optimizer goes into histrionics if it sees this kind of formal CC mismatch, since it has no concept of CC compatibility. Therefore, if this module happens to define the "runtime" function, or got LTO'ed with such a definition, we can miscompile; so it's quite important to get this right. Defining runtime functions locally is quite common in embedded applications. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176286 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/CGObjC.cpp')
-rw-r--r--lib/CodeGen/CGObjC.cpp64
1 files changed, 28 insertions, 36 deletions
diff --git a/lib/CodeGen/CGObjC.cpp b/lib/CodeGen/CGObjC.cpp
index b2f5aa3ef1..540baa13b7 100644
--- a/lib/CodeGen/CGObjC.cpp
+++ b/lib/CodeGen/CGObjC.cpp
@@ -70,7 +70,7 @@ CodeGenFunction::EmitObjCBoxedExpr(const ObjCBoxedExpr *E) {
// messaged (avoids pulling it out of the result type).
CGObjCRuntime &Runtime = CGM.getObjCRuntime();
const ObjCInterfaceDecl *ClassDecl = BoxingMethod->getClassInterface();
- llvm::Value *Receiver = Runtime.GetClass(Builder, ClassDecl);
+ llvm::Value *Receiver = Runtime.GetClass(*this, ClassDecl);
const ParmVarDecl *argDecl = *BoxingMethod->param_begin();
QualType ArgQT = argDecl->getType().getUnqualifiedType();
@@ -163,7 +163,7 @@ llvm::Value *CodeGenFunction::EmitObjCCollectionLiteral(const Expr *E,
ObjCInterfaceDecl *Class
= InterfacePointerType->getObjectType()->getInterface();
CGObjCRuntime &Runtime = CGM.getObjCRuntime();
- llvm::Value *Receiver = Runtime.GetClass(Builder, Class);
+ llvm::Value *Receiver = Runtime.GetClass(*this, Class);
// Generate the message send.
RValue result
@@ -191,12 +191,12 @@ llvm::Value *CodeGenFunction::EmitObjCSelectorExpr(const ObjCSelectorExpr *E) {
// Note that this implementation allows for non-constant strings to be passed
// as arguments to @selector(). Currently, the only thing preventing this
// behaviour is the type checking in the front end.
- return CGM.getObjCRuntime().GetSelector(Builder, E->getSelector());
+ return CGM.getObjCRuntime().GetSelector(*this, E->getSelector());
}
llvm::Value *CodeGenFunction::EmitObjCProtocolExpr(const ObjCProtocolExpr *E) {
// FIXME: This should pass the Decl not the name.
- return CGM.getObjCRuntime().GenerateProtocolRef(Builder, E->getProtocol());
+ return CGM.getObjCRuntime().GenerateProtocolRef(*this, E->getProtocol());
}
/// \brief Adjust the type of the result of an Objective-C message send
@@ -310,7 +310,7 @@ RValue CodeGenFunction::EmitObjCMessageExpr(const ObjCMessageExpr *E,
assert(ObjTy && "Invalid Objective-C class message send");
OID = ObjTy->getInterface();
assert(OID && "Invalid Objective-C class message send");
- Receiver = Runtime.GetClass(Builder, OID);
+ Receiver = Runtime.GetClass(*this, OID);
isClassMessage = true;
break;
}
@@ -1743,8 +1743,7 @@ static llvm::Value *emitARCValueOperation(CodeGenFunction &CGF,
value = CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy);
// Call the function.
- llvm::CallInst *call = CGF.Builder.CreateCall(fn, value);
- call->setDoesNotThrow();
+ llvm::CallInst *call = CGF.EmitNounwindRuntimeCall(fn, value);
if (isTailCall)
call->setTailCall();
@@ -1770,11 +1769,9 @@ static llvm::Value *emitARCLoadOperation(CodeGenFunction &CGF,
addr = CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy);
// Call the function.
- llvm::CallInst *call = CGF.Builder.CreateCall(fn, addr);
- call->setDoesNotThrow();
+ llvm::Value *result = CGF.EmitNounwindRuntimeCall(fn, addr);
// Cast the result back to a dereference of the original type.
- llvm::Value *result = call;
if (origType != CGF.Int8PtrPtrTy)
result = CGF.Builder.CreateBitCast(result,
cast<llvm::PointerType>(origType)->getElementType());
@@ -1803,11 +1800,11 @@ static llvm::Value *emitARCStoreOperation(CodeGenFunction &CGF,
llvm::Type *origType = value->getType();
- addr = CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy);
- value = CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy);
-
- llvm::CallInst *result = CGF.Builder.CreateCall2(fn, addr, value);
- result->setDoesNotThrow();
+ llvm::Value *args[] = {
+ CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy),
+ CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy)
+ };
+ llvm::CallInst *result = CGF.EmitNounwindRuntimeCall(fn, args);
if (ignored) return 0;
@@ -1830,11 +1827,11 @@ static void emitARCCopyOperation(CodeGenFunction &CGF,
fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName);
}
- dst = CGF.Builder.CreateBitCast(dst, CGF.Int8PtrPtrTy);
- src = CGF.Builder.CreateBitCast(src, CGF.Int8PtrPtrTy);
-
- llvm::CallInst *result = CGF.Builder.CreateCall2(fn, dst, src);
- result->setDoesNotThrow();
+ llvm::Value *args[] = {
+ CGF.Builder.CreateBitCast(dst, CGF.Int8PtrPtrTy),
+ CGF.Builder.CreateBitCast(src, CGF.Int8PtrPtrTy)
+ };
+ CGF.EmitNounwindRuntimeCall(fn, args);
}
/// Produce the code to do a retain. Based on the type, calls one of:
@@ -1952,8 +1949,7 @@ void CodeGenFunction::EmitARCRelease(llvm::Value *value, bool precise) {
value = Builder.CreateBitCast(value, Int8PtrTy);
// Call objc_release.
- llvm::CallInst *call = Builder.CreateCall(fn, value);
- call->setDoesNotThrow();
+ llvm::CallInst *call = EmitNounwindRuntimeCall(fn, value);
if (!precise) {
SmallVector<llvm::Value*,1> args;
@@ -2000,10 +1996,11 @@ llvm::Value *CodeGenFunction::EmitARCStoreStrongCall(llvm::Value *addr,
fn = createARCRuntimeFunction(CGM, fnType, "objc_storeStrong");
}
- addr = Builder.CreateBitCast(addr, Int8PtrPtrTy);
- llvm::Value *castValue = Builder.CreateBitCast(value, Int8PtrTy);
-
- Builder.CreateCall2(fn, addr, castValue)->setDoesNotThrow();
+ llvm::Value *args[] = {
+ Builder.CreateBitCast(addr, Int8PtrPtrTy),
+ Builder.CreateBitCast(value, Int8PtrTy)
+ };
+ EmitNounwindRuntimeCall(fn, args);
if (ignored) return 0;
return value;
@@ -2160,8 +2157,7 @@ void CodeGenFunction::EmitARCDestroyWeak(llvm::Value *addr) {
// Cast the argument to 'id*'.
addr = Builder.CreateBitCast(addr, Int8PtrPtrTy);
- llvm::CallInst *call = Builder.CreateCall(fn, addr);
- call->setDoesNotThrow();
+ EmitNounwindRuntimeCall(fn, addr);
}
/// void \@objc_moveWeak(i8** %dest, i8** %src)
@@ -2192,10 +2188,7 @@ llvm::Value *CodeGenFunction::EmitObjCAutoreleasePoolPush() {
fn = createARCRuntimeFunction(CGM, fnType, "objc_autoreleasePoolPush");
}
- llvm::CallInst *call = Builder.CreateCall(fn);
- call->setDoesNotThrow();
-
- return call;
+ return EmitNounwindRuntimeCall(fn);
}
/// Produce the code to do a primitive release.
@@ -2214,8 +2207,7 @@ void CodeGenFunction::EmitObjCAutoreleasePoolPop(llvm::Value *value) {
fn = createARCRuntimeFunction(CGM, fnType, "objc_autoreleasePoolPop");
}
- llvm::CallInst *call = Builder.CreateCall(fn, value);
- call->setDoesNotThrow();
+ EmitNounwindRuntimeCall(fn, value);
}
/// Produce the code to do an MRR version objc_autoreleasepool_push.
@@ -2225,7 +2217,7 @@ void CodeGenFunction::EmitObjCAutoreleasePoolPop(llvm::Value *value) {
///
llvm::Value *CodeGenFunction::EmitObjCMRRAutoreleasePoolPush() {
CGObjCRuntime &Runtime = CGM.getObjCRuntime();
- llvm::Value *Receiver = Runtime.EmitNSAutoreleasePoolClassRef(Builder);
+ llvm::Value *Receiver = Runtime.EmitNSAutoreleasePoolClassRef(*this);
// [NSAutoreleasePool alloc]
IdentifierInfo *II = &CGM.getContext().Idents.get("alloc");
Selector AllocSel = getContext().Selectors.getSelector(0, &II);
@@ -2800,7 +2792,7 @@ void CodeGenFunction::EmitExtendGCLifetime(llvm::Value *object) {
/* side effects */ true);
object = Builder.CreateBitCast(object, VoidPtrTy);
- Builder.CreateCall(extender, object)->setDoesNotThrow();
+ EmitNounwindRuntimeCall(extender, object);
}
/// GenerateObjCAtomicSetterCopyHelperFunction - Given a c++ object type with