Improve the AST representation of Objective-C @try/@catch/@finally
statements. Instead of the @try having a single @catch, where all of
the @catch's were chained (using an O(n^2) algorithm nonetheless),
@try just holds an array of its @catch blocks. The resulting AST is
slightly more compact (not important) and better represents the actual
language semantics (good).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102221 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index 421136b..e000bd2 100644
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -2646,8 +2646,9 @@
CGF.Builder.CreateStore(llvm::ConstantInt::getFalse(VMContext),
CallTryExitPtr);
CGF.EmitBranchThroughCleanup(FinallyRethrow);
- } else if (const ObjCAtCatchStmt* CatchStmt =
- cast<ObjCAtTryStmt>(S).getCatchStmts()) {
+ } else if (cast<ObjCAtTryStmt>(S).getNumCatchStmts()) {
+ const ObjCAtTryStmt* AtTryStmt = cast<ObjCAtTryStmt>(&S);
+
// Enter a new exception try block (in case a @catch block throws
// an exception).
CGF.Builder.CreateCall(ObjCTypes.getExceptionTryEnterFn(), ExceptionData);
@@ -2666,7 +2667,8 @@
// matched and avoid generating code for falling off the end if
// so.
bool AllMatched = false;
- for (; CatchStmt; CatchStmt = CatchStmt->getNextCatchStmt()) {
+ for (unsigned I = 0, N = AtTryStmt->getNumCatchStmts(); I != N; ++I) {
+ const ObjCAtCatchStmt *CatchStmt = AtTryStmt->getCatchStmt(I);
llvm::BasicBlock *NextCatchBlock = CGF.createBasicBlock("catch");
const ParmVarDecl *CatchParam = CatchStmt->getCatchParamDecl();
@@ -5579,42 +5581,41 @@
llvm::SmallVector<std::pair<const ParmVarDecl*, const Stmt*>, 8> Handlers;
bool HasCatchAll = false;
if (isTry) {
- if (const ObjCAtCatchStmt* CatchStmt =
- cast<ObjCAtTryStmt>(S).getCatchStmts()) {
- for (; CatchStmt; CatchStmt = CatchStmt->getNextCatchStmt()) {
- const ParmVarDecl *CatchDecl = CatchStmt->getCatchParamDecl();
- Handlers.push_back(std::make_pair(CatchDecl, CatchStmt->getCatchBody()));
+ const ObjCAtTryStmt &AtTry = cast<ObjCAtTryStmt>(S);
+ for (unsigned I = 0, N = AtTry.getNumCatchStmts(); I != N; ++I) {
+ const ObjCAtCatchStmt *CatchStmt = AtTry.getCatchStmt(I);
+ const ParmVarDecl *CatchDecl = CatchStmt->getCatchParamDecl();
+ Handlers.push_back(std::make_pair(CatchDecl, CatchStmt->getCatchBody()));
- // catch(...) always matches.
- if (!CatchDecl) {
- // Use i8* null here to signal this is a catch all, not a cleanup.
- llvm::Value *Null = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
- SelectorArgs.push_back(Null);
- HasCatchAll = true;
- break;
- }
+ // catch(...) always matches.
+ if (!CatchDecl) {
+ // Use i8* null here to signal this is a catch all, not a cleanup.
+ llvm::Value *Null = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
+ SelectorArgs.push_back(Null);
+ HasCatchAll = true;
+ break;
+ }
- if (CatchDecl->getType()->isObjCIdType() ||
- CatchDecl->getType()->isObjCQualifiedIdType()) {
- llvm::Value *IDEHType =
- CGM.getModule().getGlobalVariable("OBJC_EHTYPE_id");
- if (!IDEHType)
- IDEHType =
- new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.EHTypeTy,
- false,
- llvm::GlobalValue::ExternalLinkage,
- 0, "OBJC_EHTYPE_id");
- SelectorArgs.push_back(IDEHType);
- } else {
- // All other types should be Objective-C interface pointer types.
- const ObjCObjectPointerType *PT =
- CatchDecl->getType()->getAs<ObjCObjectPointerType>();
- assert(PT && "Invalid @catch type.");
- const ObjCInterfaceType *IT = PT->getInterfaceType();
- assert(IT && "Invalid @catch type.");
- llvm::Value *EHType = GetInterfaceEHType(IT->getDecl(), false);
- SelectorArgs.push_back(EHType);
- }
+ if (CatchDecl->getType()->isObjCIdType() ||
+ CatchDecl->getType()->isObjCQualifiedIdType()) {
+ llvm::Value *IDEHType =
+ CGM.getModule().getGlobalVariable("OBJC_EHTYPE_id");
+ if (!IDEHType)
+ IDEHType =
+ new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.EHTypeTy,
+ false,
+ llvm::GlobalValue::ExternalLinkage,
+ 0, "OBJC_EHTYPE_id");
+ SelectorArgs.push_back(IDEHType);
+ } else {
+ // All other types should be Objective-C interface pointer types.
+ const ObjCObjectPointerType *PT =
+ CatchDecl->getType()->getAs<ObjCObjectPointerType>();
+ assert(PT && "Invalid @catch type.");
+ const ObjCInterfaceType *IT = PT->getInterfaceType();
+ assert(IT && "Invalid @catch type.");
+ llvm::Value *EHType = GetInterfaceEHType(IT->getDecl(), false);
+ SelectorArgs.push_back(EHType);
}
}
}