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Itanium ABI exception handing support.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34480 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2007-02-21 22:49:50 +00:00
parent bacd304463
commit c518ccfeb5
1 changed files with 50 additions and 36 deletions
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14
lib/Transforms/Utils/LowerInvoke.cpp
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@ -58,6 +58,9 @@ STATISTIC(NumSpilled, "Number of registers live across unwind edges");
static cl::opt<bool> ExpensiveEHSupport("enable-correct-eh-support",
cl::desc("Make the -lowerinvoke pass insert expensive, but correct, EH code"));
static cl::opt<bool> ItaniumEHSupport("enable-real-eh-support",
cl::desc("Make the -lowerinvoke pass insert itanium ABI EH code"));
namespace {
class VISIBILITY_HIDDEN LowerInvoke : public FunctionPass {
// Used for both models.
@ -94,6 +97,7 @@ namespace {
void splitLiveRangesLiveAcrossInvokes(std::vector<InvokeInst*> &Invokes);
void rewriteExpensiveInvoke(InvokeInst *II, unsigned InvokeNo,
AllocaInst *InvokeNum, SwitchInst *CatchSwitch);
bool insertItaniumEHSupport(Function &F);
bool insertExpensiveEHSupport(Function &F);
};
@ -111,6 +115,9 @@ FunctionPass *llvm::createLowerInvokePass(const TargetLowering *TLI) {
// doInitialization - Make sure that there is a prototype for abort in the
// current module.
bool LowerInvoke::doInitialization(Module &M) {
if (ItaniumEHSupport) {
// Let Invoke pass through for ItaniumEHSupport support.
} else {
const Type *VoidPtrTy = PointerType::get(Type::Int8Ty);
AbortMessage = 0;
if (ExpensiveEHSupport) {
@ -151,6 +158,7 @@ bool LowerInvoke::doInitialization(Module &M) {
AbortFn = M.getOrInsertFunction("abort", Type::VoidTy, (Type *)0);
WriteFn = M.getOrInsertFunction("write", Type::VoidTy, Type::Int32Ty,
VoidPtrTy, Type::Int32Ty, (Type *)0);
}
return true;
}
@ -388,6 +396,10 @@ splitLiveRangesLiveAcrossInvokes(std::vector<InvokeInst*> &Invokes) {
}
}
bool LowerInvoke::insertItaniumEHSupport(Function &F) {
return true;
}
bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
std::vector<ReturnInst*> Returns;
std::vector<UnwindInst*> Unwinds;
@ -569,6 +581,8 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
}
bool LowerInvoke::runOnFunction(Function &F) {
if (ItaniumEHSupport)
return insertItaniumEHSupport(F);
if (ExpensiveEHSupport)
return insertExpensiveEHSupport(F);
else