int getArgumentFrameIndex(const Argument *A);
private:
- void addSEHHandlersForLPads();
-
/// LiveOutRegInfo - Information about live out vregs.
IndexedMap<LiveOutInfo, VirtReg2IndexFunctor> LiveOutRegInfo;
};
// Forward declarations.
class Constant;
class GlobalVariable;
-class BlockAddress;
class MDNode;
class MMIAddrLabelMap;
class MachineBasicBlock;
class StructType;
struct WinEHFuncInfo;
-struct SEHHandler {
- // Filter or finally function. Null indicates a catch-all.
- const Function *FilterOrFinally;
-
- // Address of block to recover at. Null for a finally handler.
- const BlockAddress *RecoverBA;
-};
-
//===----------------------------------------------------------------------===//
/// LandingPadInfo - This structure is used to retain landing pad info for
/// the current function.
MachineBasicBlock *LandingPadBlock; // Landing pad block.
SmallVector<MCSymbol *, 1> BeginLabels; // Labels prior to invoke.
SmallVector<MCSymbol *, 1> EndLabels; // Labels after invoke.
- SmallVector<SEHHandler, 1> SEHHandlers; // SEH handlers active at this lpad.
+ SmallVector<MCSymbol *, 1> ClauseLabels; // Labels for each clause.
MCSymbol *LandingPadLabel; // Label at beginning of landing pad.
const Function *Personality; // Personality function.
std::vector<int> TypeIds; // List of type ids (filters negative).
///
void addCleanup(MachineBasicBlock *LandingPad);
- void addSEHCatchHandler(MachineBasicBlock *LandingPad, const Function *Filter,
- const BlockAddress *RecoverLabel);
-
- void addSEHCleanupHandler(MachineBasicBlock *LandingPad,
- const Function *Cleanup);
+ /// Add a clause for a landing pad. Returns a new label for the clause. This
+ /// is used by EH schemes that have more than one landing pad. In this case,
+ /// each clause gets its own basic block.
+ MCSymbol *addClauseForLandingPad(MachineBasicBlock *LandingPad);
/// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
SDNode *MorphNode(SDNode *Node, unsigned TargetOpc, SDVTList VTs,
ArrayRef<SDValue> Ops, unsigned EmitNodeInfo);
- /// Prepares the landing pad to take incoming values or do other EH
- /// personality specific tasks. Returns true if the block should be
- /// instruction selected, false if no code should be emitted for it.
- bool PrepareEHLandingPad();
+ void PrepareEHLandingPad();
/// \brief Perform instruction selection on all basic blocks in the function.
void SelectAllBasicBlocks(const Function &Fn);
for (const CallSiteEntry &CSE : CallSites) {
if (!CSE.LPad)
continue; // Ignore gaps.
- NumEntries += CSE.LPad->SEHHandlers.size();
+ for (int Selector : CSE.LPad->TypeIds) {
+ // Ignore C++ filter clauses in SEH.
+ // FIXME: Implement cleanup clauses.
+ if (isCatchEHSelector(Selector))
+ ++NumEntries;
+ }
}
Asm->OutStreamer.EmitIntValue(NumEntries, 4);
- // If there are no actions, we don't need to iterate again.
- if (NumEntries == 0)
- return;
-
// Emit the four-label records for each call site entry. The table has to be
// sorted in layout order, and the call sites should already be sorted.
for (const CallSiteEntry &CSE : CallSites) {
End = createImageRel32(EHFuncEndSym);
}
- // Emit an entry for each action.
- for (SEHHandler Handler : LPad->SEHHandlers) {
+ // These aren't really type info globals, they are actually pointers to
+ // filter functions ordered by selector. The zero selector is used for
+ // cleanups, so slot zero corresponds to selector 1.
+ const std::vector<const GlobalValue *> &SelectorToFilter = MMI->getTypeInfos();
+
+ // Do a parallel iteration across typeids and clause labels, skipping filter
+ // clauses.
+ size_t NextClauseLabel = 0;
+ for (size_t I = 0, E = LPad->TypeIds.size(); I < E; ++I) {
+ // AddLandingPadInfo stores the clauses in reverse, but there is a FIXME
+ // to change that.
+ int Selector = LPad->TypeIds[E - I - 1];
+
+ // Ignore C++ filter clauses in SEH.
+ // FIXME: Implement cleanup clauses.
+ if (!isCatchEHSelector(Selector))
+ continue;
+
Asm->OutStreamer.EmitValue(Begin, 4);
Asm->OutStreamer.EmitValue(End, 4);
-
- // Emit the filter or finally function pointer, if present. Otherwise,
- // emit '1' to indicate a catch-all.
- const Function *F = Handler.FilterOrFinally;
- if (F)
- Asm->OutStreamer.EmitValue(createImageRel32(Asm->getSymbol(F)), 4);
- else
- Asm->OutStreamer.EmitIntValue(1, 4);
-
- // Emit the recovery address, if present. Otherwise, this must be a
- // finally.
- const BlockAddress *BA = Handler.RecoverBA;
- if (BA)
- Asm->OutStreamer.EmitValue(
- createImageRel32(Asm->GetBlockAddressSymbol(BA)), 4);
- else
- Asm->OutStreamer.EmitIntValue(0, 4);
+ if (isCatchEHSelector(Selector)) {
+ assert(unsigned(Selector - 1) < SelectorToFilter.size());
+ const GlobalValue *TI = SelectorToFilter[Selector - 1];
+ if (TI) // Emit the filter function pointer.
+ Asm->OutStreamer.EmitValue(createImageRel32(Asm->getSymbol(TI)), 4);
+ else // Otherwise, this is a "catch i8* null", or catch all.
+ Asm->OutStreamer.EmitIntValue(1, 4);
+ }
+ MCSymbol *ClauseLabel = LPad->ClauseLabels[NextClauseLabel++];
+ Asm->OutStreamer.EmitValue(createImageRel32(ClauseLabel), 4);
}
}
}
LP.TypeIds.push_back(0);
}
-void MachineModuleInfo::addSEHCatchHandler(MachineBasicBlock *LandingPad,
- const Function *Filter,
- const BlockAddress *RecoverBA) {
+MCSymbol *
+MachineModuleInfo::addClauseForLandingPad(MachineBasicBlock *LandingPad) {
+ MCSymbol *ClauseLabel = Context.CreateTempSymbol();
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
- SEHHandler Handler;
- Handler.FilterOrFinally = Filter;
- Handler.RecoverBA = RecoverBA;
- LP.SEHHandlers.push_back(Handler);
-}
-
-void MachineModuleInfo::addSEHCleanupHandler(MachineBasicBlock *LandingPad,
- const Function *Cleanup) {
- LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
- SEHHandler Handler;
- Handler.FilterOrFinally = Cleanup;
- Handler.RecoverBA = nullptr;
- LP.SEHHandlers.push_back(Handler);
+ LP.ClauseLabels.push_back(ClauseLabel);
+ return ClauseLabel;
}
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
}
// Mark landing pad blocks.
- const LandingPadInst *LP = nullptr;
- for (BB = Fn->begin(); BB != EB; ++BB) {
+ for (BB = Fn->begin(); BB != EB; ++BB)
if (const auto *Invoke = dyn_cast<InvokeInst>(BB->getTerminator()))
MBBMap[Invoke->getSuccessor(1)]->setIsLandingPad();
- if (BB->isLandingPad())
- LP = BB->getLandingPadInst();
- }
- // Calculate EH numbers for MSVC C++ EH and save SEH handlers if necessary.
- EHPersonality Personality = EHPersonality::Unknown;
- if (LP)
- Personality = classifyEHPersonality(LP->getPersonalityFn());
- if (Personality == EHPersonality::MSVC_Win64SEH) {
- addSEHHandlersForLPads();
- } else if (Personality == EHPersonality::MSVC_CXX) {
+ // Calculate EH numbers for WinEH.
+ if (fn.hasFnAttribute("wineh-parent")) {
const Function *WinEHParentFn = MMI.getWinEHParent(&fn);
WinEHFuncInfo &FI = MMI.getWinEHFuncInfo(WinEHParentFn);
if (FI.LandingPadStateMap.empty()) {
}
}
-void FunctionLoweringInfo::addSEHHandlersForLPads() {
- MachineModuleInfo &MMI = MF->getMMI();
-
- // Iterate over all landing pads with llvm.eh.actions calls.
- for (const BasicBlock &BB : *Fn) {
- const LandingPadInst *LP = BB.getLandingPadInst();
- if (!LP)
- continue;
- const IntrinsicInst *ActionsCall =
- dyn_cast<IntrinsicInst>(LP->getNextNode());
- if (!ActionsCall ||
- ActionsCall->getIntrinsicID() != Intrinsic::eh_actions)
- continue;
-
- // Parse the llvm.eh.actions call we found.
- MachineBasicBlock *LPadMBB = MBBMap[LP->getParent()];
- SmallVector<ActionHandler *, 4> Actions;
- parseEHActions(ActionsCall, Actions);
-
- // Iterate EH actions from most to least precedence, which means
- // iterating in reverse.
- for (auto I = Actions.rbegin(), E = Actions.rend(); I != E; ++I) {
- ActionHandler *Action = *I;
- if (auto *CH = dyn_cast<CatchHandler>(Action)) {
- const auto *Filter =
- dyn_cast<Function>(CH->getSelector()->stripPointerCasts());
- assert((Filter || CH->getSelector()->isNullValue()) &&
- "expected function or catch-all");
- const auto *RecoverBA =
- cast<BlockAddress>(CH->getHandlerBlockOrFunc());
- MMI.addSEHCatchHandler(LPadMBB, Filter, RecoverBA);
- } else {
- assert(isa<CleanupHandler>(Action));
- const auto *Fini = cast<Function>(Action->getHandlerBlockOrFunc());
- MMI.addSEHCleanupHandler(LPadMBB, Fini);
- }
- }
- DeleteContainerPointers(Actions);
- }
-}
-
void WinEHNumbering::createUnwindMapEntry(int ToState, ActionHandler *AH) {
WinEHUnwindMapEntry UME;
UME.ToState = ToState;
/// PrepareEHLandingPad - Emit an EH_LABEL, set up live-in registers, and
/// do other setup for EH landing-pad blocks.
-bool SelectionDAGISel::PrepareEHLandingPad() {
+void SelectionDAGISel::PrepareEHLandingPad() {
MachineBasicBlock *MBB = FuncInfo->MBB;
const TargetRegisterClass *PtrRC = TLI->getRegClassFor(TLI->getPointerTy());
if (isMSVCEHPersonality(Personality)) {
SmallVector<MachineBasicBlock *, 4> ClauseBBs;
- const IntrinsicInst *ActionsCall =
+ const IntrinsicInst *Actions =
dyn_cast<IntrinsicInst>(LLVMBB->getFirstInsertionPt());
// Get all invoke BBs that unwind to this landingpad.
SmallVector<MachineBasicBlock *, 4> InvokeBBs(MBB->pred_begin(),
MBB->pred_end());
- if (!ActionsCall || ActionsCall->getIntrinsicID() != Intrinsic::eh_actions) {
- assert(isa<UnreachableInst>(LLVMBB->getFirstInsertionPt()) &&
- "found landingpad without unreachable or llvm.eh.actions");
- return false;
- }
+ if (Actions && Actions->getIntrinsicID() == Intrinsic::eh_actions) {
+ // If this is a call to llvm.eh.actions followed by indirectbr, then we've
+ // run WinEHPrepare, and we should remove this block from the machine CFG.
+ // Mark the targets of the indirectbr as landingpads instead.
+ for (const BasicBlock *LLVMSucc : successors(LLVMBB)) {
+ MachineBasicBlock *ClauseBB = FuncInfo->MBBMap[LLVMSucc];
+ // Add the edge from the invoke to the clause.
+ for (MachineBasicBlock *InvokeBB : InvokeBBs)
+ InvokeBB->addSuccessor(ClauseBB);
+ }
+ } else {
+ // Otherwise, we haven't done the preparation, and we need to invent some
+ // clause basic blocks that branch into the landingpad.
+ // FIXME: Remove this code once SEH preparation works.
+
+ // Make virtual registers and a series of labels that fill in values for
+ // the clauses.
+ auto &RI = MF->getRegInfo();
+ FuncInfo->ExceptionSelectorVirtReg = RI.createVirtualRegister(PtrRC);
+
+ // Emit separate machine basic blocks with separate labels for each clause
+ // before the main landing pad block.
+ MachineInstrBuilder SelectorPHI = BuildMI(
+ *MBB, MBB->begin(), SDB->getCurDebugLoc(),
+ TII->get(TargetOpcode::PHI), FuncInfo->ExceptionSelectorVirtReg);
+ for (unsigned I = 0, E = LPadInst->getNumClauses(); I != E; ++I) {
+ // Skip filter clauses, we can't implement them.
+ if (LPadInst->isFilter(I))
+ continue;
+
+ MachineBasicBlock *ClauseBB = MF->CreateMachineBasicBlock(LLVMBB);
+ MF->insert(MBB, ClauseBB);
+
+ // Add the edge from the invoke to the clause.
+ for (MachineBasicBlock *InvokeBB : InvokeBBs)
+ InvokeBB->addSuccessor(ClauseBB);
+
+ // Mark the clause as a landing pad or MI passes will delete it.
+ ClauseBB->setIsLandingPad();
+
+ GlobalValue *ClauseGV = ExtractTypeInfo(LPadInst->getClause(I));
+
+ // Start the BB with a label.
+ MCSymbol *ClauseLabel = MF->getMMI().addClauseForLandingPad(MBB);
+ BuildMI(*ClauseBB, ClauseBB->begin(), SDB->getCurDebugLoc(), II)
+ .addSym(ClauseLabel);
- // If this is a call to llvm.eh.actions followed by indirectbr, then we've
- // run WinEHPrepare, and we should remove this block from the machine CFG.
- // Mark the targets of the indirectbr as landingpads instead.
- for (const BasicBlock *LLVMSucc : successors(LLVMBB)) {
- MachineBasicBlock *ClauseBB = FuncInfo->MBBMap[LLVMSucc];
- // Add the edge from the invoke to the clause.
- for (MachineBasicBlock *InvokeBB : InvokeBBs)
- InvokeBB->addSuccessor(ClauseBB);
-
- // Mark the clause as a landing pad or MI passes will delete it.
- ClauseBB->setIsLandingPad();
+ // Construct a simple BB that defines a register with the typeid
+ // constant.
+ FuncInfo->MBB = ClauseBB;
+ FuncInfo->InsertPt = ClauseBB->end();
+ unsigned VReg = SDB->visitLandingPadClauseBB(ClauseGV, MBB);
+ CurDAG->setRoot(SDB->getRoot());
+ SDB->clear();
+ CodeGenAndEmitDAG();
+
+ // Add the typeid virtual register to the phi in the main landing pad.
+ SelectorPHI.addReg(VReg).addMBB(ClauseBB);
+ }
}
// Remove the edge from the invoke to the lpad.
WinEHFuncInfo &FI = MF->getMMI().getWinEHFuncInfo(MF->getFunction());
MF->getMMI().addWinEHState(MBB, FI.LandingPadStateMap[LPadInst]);
}
-
- // Don't select instructions for landing pads using llvm.eh.actions.
- return false;
+ return;
}
// Mark exception register as live in.
// Mark exception selector register as live in.
if (unsigned Reg = TLI->getExceptionSelectorRegister())
FuncInfo->ExceptionSelectorVirtReg = MBB->addLiveIn(Reg, PtrRC);
-
- return true;
}
/// isFoldedOrDeadInstruction - Return true if the specified instruction is
FuncInfo->ExceptionPointerVirtReg = 0;
FuncInfo->ExceptionSelectorVirtReg = 0;
if (LLVMBB->isLandingPad())
- if (!PrepareEHLandingPad())
- continue;
+ PrepareEHLandingPad();
// Before doing SelectionDAG ISel, see if FastISel has been requested.
if (FastIS) {
return new WinEHPrepare(TM);
}
+// FIXME: Remove this once the backend can handle the prepared IR.
+static cl::opt<bool>
+ SEHPrepare("sehprepare", cl::Hidden,
+ cl::desc("Prepare functions with SEH personalities"));
+
bool WinEHPrepare::runOnFunction(Function &Fn) {
SmallVector<LandingPadInst *, 4> LPads;
SmallVector<ResumeInst *, 4> Resumes;
DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
+ if (isAsynchronousEHPersonality(Personality) && !SEHPrepare) {
+ // Replace all resume instructions with unreachable.
+ // FIXME: Remove this once the backend can handle the prepared IR.
+ for (ResumeInst *Resume : Resumes) {
+ IRBuilder<>(Resume).CreateUnreachable();
+ Resume->eraseFromParent();
+ }
+ return true;
+ }
+
// If there were any landing pads, prepareExceptionHandlers will make changes.
prepareExceptionHandlers(Fn, LPads);
return true;
-; RUN: opt -S -winehprepare < %s | FileCheck %s
+; RUN: opt -S -winehprepare -sehprepare < %s | FileCheck %s
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
-; RUN: opt -S -winehprepare < %s | FileCheck %s
+; RUN: opt -S -winehprepare -sehprepare < %s | FileCheck %s
; Check that things work when the mid-level optimizer inlines the finally
; block.
-; RUN: opt -S -winehprepare -mtriple=x86_64-windows-msvc < %s | FileCheck %s
+; RUN: opt -S -winehprepare -sehprepare -mtriple=x86_64-windows-msvc < %s | FileCheck %s
; Test case based on this code:
;
+++ /dev/null
-; RUN: llc < %s | FileCheck %s
-
-; Test case based on this code:
-; extern "C" unsigned long _exception_code();
-; extern "C" int filt(unsigned long);
-; extern "C" void g();
-; extern "C" void do_except() {
-; __try {
-; g();
-; } __except(filt(_exception_code())) {
-; }
-; }
-
-target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-pc-windows-msvc"
-
-; Function Attrs: uwtable
-define void @do_except() #0 {
-entry:
- call void (...) @llvm.frameescape()
- invoke void @g() #5
- to label %__try.cont unwind label %lpad1
-
-lpad1: ; preds = %entry
- %ehvals = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
- catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@do_except@@" to i8*)
- %recover = call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@do_except@@" to i8*), i32 -1, i8* blockaddress(@do_except, %__try.cont))
- indirectbr i8* %recover, [label %__try.cont]
-
-__try.cont: ; preds = %lpad1, %entry
- ret void
-}
-
-; CHECK-LABEL: do_except:
-; CHECK: .seh_handler __C_specific_handler
-; CHECK-NOT: jmpq *
-; CHECK: .seh_handlerdata
-; CHECK-NEXT: .long 1
-; CHECK-NEXT: .long .Ltmp{{.*}}
-; CHECK-NEXT: .long .Ltmp{{.*}}
-; CHECK-NEXT: .long "?filt$0@0@do_except@@"@IMGREL
-; CHECK-NEXT: .long .Ltmp{{.*}}@IMGREL
-
-; Function Attrs: noinline nounwind
-define internal i32 @"\01?filt$0@0@do_except@@"(i8* nocapture readonly %exception_pointers, i8* nocapture readnone %frame_pointer) #1 {
-entry:
- %0 = bitcast i8* %exception_pointers to i32**
- %1 = load i32*, i32** %0, align 8
- %2 = load i32, i32* %1, align 4
- %call = tail call i32 @filt(i32 %2) #4
- ret i32 %call
-}
-
-declare i32 @filt(i32) #2
-
-declare void @g() #2
-
-declare i32 @__C_specific_handler(...)
-
-; Function Attrs: nounwind readnone
-declare i32 @llvm.eh.typeid.for(i8*) #3
-
-; Function Attrs: nounwind
-declare i8* @llvm.eh.actions(...) #4
-
-; Function Attrs: nounwind
-declare void @llvm.frameescape(...) #4
-
-; Function Attrs: nounwind readnone
-declare i8* @llvm.framerecover(i8*, i8*, i32) #3
-
-attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" "wineh-parent"="do_except" }
-attributes #1 = { noinline nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #3 = { nounwind readnone }
-attributes #4 = { nounwind }
-attributes #5 = { noinline }
-
-!llvm.module.flags = !{!0}
-!llvm.ident = !{!1}
-
-!0 = !{i32 1, !"PIC Level", i32 2}
-!1 = !{!"clang version 3.7.0 "}
-; RUN: opt -S -winehprepare -mtriple=x86_64-windows-msvc < %s | FileCheck %s
+; RUN: opt -S -winehprepare -sehprepare -mtriple=x86_64-windows-msvc < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
--- /dev/null
+; RUN: llc -mtriple x86_64-pc-windows-msvc < %s | FileCheck %s
+
+define void @two_invoke_merged() {
+entry:
+ invoke void @try_body()
+ to label %again unwind label %lpad
+
+again:
+ invoke void @try_body()
+ to label %done unwind label %lpad
+
+done:
+ ret void
+
+lpad:
+ %vals = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
+ catch i8* bitcast (i32 (i8*, i8*)* @filt0 to i8*)
+ catch i8* bitcast (i32 (i8*, i8*)* @filt1 to i8*)
+ %sel = extractvalue { i8*, i32 } %vals, 1
+ call void @use_selector(i32 %sel)
+ ret void
+}
+
+; Normal path code
+
+; CHECK-LABEL: {{^}}two_invoke_merged:
+; CHECK: .seh_proc two_invoke_merged
+; CHECK: .seh_handler __C_specific_handler, @unwind, @except
+; CHECK: .Ltmp0:
+; CHECK: callq try_body
+; CHECK-NEXT: .Ltmp1:
+; CHECK: .Ltmp2:
+; CHECK: callq try_body
+; CHECK-NEXT: .Ltmp3:
+; CHECK: retq
+
+; Landing pad code
+
+; CHECK: .Ltmp5:
+; CHECK: movl $1, %ecx
+; CHECK: jmp
+; CHECK: .Ltmp6:
+; CHECK: movl $2, %ecx
+; CHECK: callq use_selector
+
+; CHECK: .seh_handlerdata
+; CHECK-NEXT: .long 2
+; CHECK-NEXT: .long .Ltmp0@IMGREL
+; CHECK-NEXT: .long .Ltmp3@IMGREL+1
+; CHECK-NEXT: .long filt0@IMGREL
+; CHECK-NEXT: .long .Ltmp5@IMGREL
+; CHECK-NEXT: .long .Ltmp0@IMGREL
+; CHECK-NEXT: .long .Ltmp3@IMGREL+1
+; CHECK-NEXT: .long filt1@IMGREL
+; CHECK-NEXT: .long .Ltmp6@IMGREL
+; CHECK: .text
+; CHECK: .seh_endproc
+
+define void @two_invoke_gap() {
+entry:
+ invoke void @try_body()
+ to label %again unwind label %lpad
+
+again:
+ call void @do_nothing_on_unwind()
+ invoke void @try_body()
+ to label %done unwind label %lpad
+
+done:
+ ret void
+
+lpad:
+ %vals = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
+ catch i8* bitcast (i32 (i8*, i8*)* @filt0 to i8*)
+ %sel = extractvalue { i8*, i32 } %vals, 1
+ call void @use_selector(i32 %sel)
+ ret void
+}
+
+; Normal path code
+
+; CHECK-LABEL: {{^}}two_invoke_gap:
+; CHECK: .seh_proc two_invoke_gap
+; CHECK: .seh_handler __C_specific_handler, @unwind, @except
+; CHECK: .Ltmp11:
+; CHECK: callq try_body
+; CHECK-NEXT: .Ltmp12:
+; CHECK: callq do_nothing_on_unwind
+; CHECK: .Ltmp13:
+; CHECK: callq try_body
+; CHECK-NEXT: .Ltmp14:
+; CHECK: retq
+
+; Landing pad code
+
+; CHECK: .Ltmp16:
+; CHECK: movl $1, %ecx
+; CHECK: callq use_selector
+
+; CHECK: .seh_handlerdata
+; CHECK-NEXT: .long 2
+; CHECK-NEXT: .long .Ltmp11@IMGREL
+; CHECK-NEXT: .long .Ltmp12@IMGREL+1
+; CHECK-NEXT: .long filt0@IMGREL
+; CHECK-NEXT: .long .Ltmp16@IMGREL
+; CHECK-NEXT: .long .Ltmp13@IMGREL
+; CHECK-NEXT: .long .Ltmp14@IMGREL+1
+; CHECK-NEXT: .long filt0@IMGREL
+; CHECK-NEXT: .long .Ltmp16@IMGREL
+; CHECK: .text
+; CHECK: .seh_endproc
+
+define void @two_invoke_nounwind_gap() {
+entry:
+ invoke void @try_body()
+ to label %again unwind label %lpad
+
+again:
+ call void @cannot_unwind()
+ invoke void @try_body()
+ to label %done unwind label %lpad
+
+done:
+ ret void
+
+lpad:
+ %vals = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
+ catch i8* bitcast (i32 (i8*, i8*)* @filt0 to i8*)
+ %sel = extractvalue { i8*, i32 } %vals, 1
+ call void @use_selector(i32 %sel)
+ ret void
+}
+
+; Normal path code
+
+; CHECK-LABEL: {{^}}two_invoke_nounwind_gap:
+; CHECK: .seh_proc two_invoke_nounwind_gap
+; CHECK: .seh_handler __C_specific_handler, @unwind, @except
+; CHECK: .Ltmp21:
+; CHECK: callq try_body
+; CHECK-NEXT: .Ltmp22:
+; CHECK: callq cannot_unwind
+; CHECK: .Ltmp23:
+; CHECK: callq try_body
+; CHECK-NEXT: .Ltmp24:
+; CHECK: retq
+
+; Landing pad code
+
+; CHECK: .Ltmp26:
+; CHECK: movl $1, %ecx
+; CHECK: callq use_selector
+
+; CHECK: .seh_handlerdata
+; CHECK-NEXT: .long 1
+; CHECK-NEXT: .long .Ltmp21@IMGREL
+; CHECK-NEXT: .long .Ltmp24@IMGREL+1
+; CHECK-NEXT: .long filt0@IMGREL
+; CHECK-NEXT: .long .Ltmp26@IMGREL
+; CHECK: .text
+; CHECK: .seh_endproc
+
+declare void @try_body()
+declare void @do_nothing_on_unwind()
+declare void @cannot_unwind() nounwind
+declare void @use_selector(i32)
+
+declare i32 @filt0(i8* %eh_info, i8* %rsp)
+declare i32 @filt1(i8* %eh_info, i8* %rsp)
+
+declare void @handler0()
+declare void @handler1()
+
+declare i32 @__C_specific_handler(...)
+declare i32 @llvm.eh.typeid.for(i8*) readnone nounwind
+++ /dev/null
-; RUN: llc < %s | FileCheck %s
-
-; Test case based on this source:
-; int puts(const char*);
-; __declspec(noinline) void crash() {
-; *(volatile int*)0 = 42;
-; }
-; int filt();
-; void use_both() {
-; __try {
-; __try {
-; crash();
-; } __finally {
-; puts("__finally");
-; }
-; } __except (filt()) {
-; puts("__except");
-; }
-; }
-
-target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-pc-windows-msvc"
-
-$"\01??_C@_09KJEHOMHG@__finally?$AA@" = comdat any
-
-$"\01??_C@_08MLCMLGHM@__except?$AA@" = comdat any
-
-@"\01??_C@_09KJEHOMHG@__finally?$AA@" = linkonce_odr unnamed_addr constant [10 x i8] c"__finally\00", comdat, align 1
-@"\01??_C@_08MLCMLGHM@__except?$AA@" = linkonce_odr unnamed_addr constant [9 x i8] c"__except\00", comdat, align 1
-
-declare void @crash()
-
-declare i32 @filt()
-
-; Function Attrs: nounwind uwtable
-define void @use_both() #1 {
-entry:
- %exn.slot = alloca i8*
- %ehselector.slot = alloca i32
- invoke void @crash() #5
- to label %invoke.cont unwind label %lpad
-
-invoke.cont: ; preds = %entry
- %0 = call i8* @llvm.frameaddress(i32 0)
- invoke void @"\01?fin$0@0@use_both@@"(i1 zeroext false, i8* %0) #5
- to label %invoke.cont2 unwind label %lpad1
-
-invoke.cont2: ; preds = %invoke.cont
- br label %__try.cont
-
-lpad: ; preds = %entry
- %1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
- cleanup
- catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@use_both@@" to i8*)
- %2 = extractvalue { i8*, i32 } %1, 0
- store i8* %2, i8** %exn.slot
- %3 = extractvalue { i8*, i32 } %1, 1
- store i32 %3, i32* %ehselector.slot
- %4 = call i8* @llvm.frameaddress(i32 0)
- invoke void @"\01?fin$0@0@use_both@@"(i1 zeroext true, i8* %4) #5
- to label %invoke.cont3 unwind label %lpad1
-
-lpad1: ; preds = %lpad, %invoke.cont
- %5 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
- catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@use_both@@" to i8*)
- %6 = extractvalue { i8*, i32 } %5, 0
- store i8* %6, i8** %exn.slot
- %7 = extractvalue { i8*, i32 } %5, 1
- store i32 %7, i32* %ehselector.slot
- br label %catch.dispatch
-
-invoke.cont3: ; preds = %lpad
- br label %catch.dispatch
-
-catch.dispatch: ; preds = %invoke.cont3, %lpad1
- %sel = load i32, i32* %ehselector.slot
- %8 = call i32 @llvm.eh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@use_both@@" to i8*)) #6
- %matches = icmp eq i32 %sel, %8
- br i1 %matches, label %__except, label %eh.resume
-
-__except: ; preds = %catch.dispatch
- %call = call i32 @puts(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @"\01??_C@_08MLCMLGHM@__except?$AA@", i32 0, i32 0))
- br label %__try.cont
-
-__try.cont: ; preds = %__except, %invoke.cont2
- ret void
-
-eh.resume: ; preds = %catch.dispatch
- %exn = load i8*, i8** %exn.slot
- %sel4 = load i32, i32* %ehselector.slot
- %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn, 0
- %lpad.val5 = insertvalue { i8*, i32 } %lpad.val, i32 %sel4, 1
- resume { i8*, i32 } %lpad.val5
-}
-
-; CHECK-LABEL: use_both:
-; CHECK: .Ltmp0
-; CHECK: callq crash
-; CHECK: .Ltmp1
-; CHECK: .Ltmp3
-; CHECK: callq "?fin$0@0@use_both@@"
-; CHECK: .Ltmp4
-; CHECK: retq
-;
-; CHECK: .seh_handlerdata
-; CHECK-NEXT: .long 3
-; CHECK-NEXT: .long .Ltmp0@IMGREL
-; CHECK-NEXT: .long .Ltmp1@IMGREL+1
-; CHECK-NEXT: .long "?fin$0@0@use_both@@"@IMGREL
-; CHECK-NEXT: .long 0
-; CHECK-NEXT: .long .Ltmp0@IMGREL
-; CHECK-NEXT: .long .Ltmp1@IMGREL+1
-; CHECK-NEXT: .long "?filt$0@0@use_both@@"@IMGREL
-; CHECK-NEXT: .long .Ltmp{{[0-9]+}}@IMGREL
-; CHECK-NEXT: .long .Ltmp3@IMGREL
-; CHECK-NEXT: .long .Ltmp4@IMGREL+1
-; CHECK-NEXT: .long "?filt$0@0@use_both@@"@IMGREL
-; CHECK-NEXT: .long .Ltmp{{[0-9]+}}@IMGREL
-
-; Function Attrs: noinline nounwind
-define internal i32 @"\01?filt$0@0@use_both@@"(i8* %exception_pointers, i8* %frame_pointer) #2 {
-entry:
- %frame_pointer.addr = alloca i8*, align 8
- %exception_pointers.addr = alloca i8*, align 8
- %exn.slot = alloca i8*
- store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
- store i8* %exception_pointers, i8** %exception_pointers.addr, align 8
- %0 = load i8*, i8** %exception_pointers.addr
- %1 = bitcast i8* %0 to { i32*, i8* }*
- %2 = getelementptr inbounds { i32*, i8* }, { i32*, i8* }* %1, i32 0, i32 0
- %3 = load i32*, i32** %2
- %4 = load i32, i32* %3
- %5 = zext i32 %4 to i64
- %6 = inttoptr i64 %5 to i8*
- store i8* %6, i8** %exn.slot
- %call = call i32 @filt()
- ret i32 %call
-}
-
-define internal void @"\01?fin$0@0@use_both@@"(i1 zeroext %abnormal_termination, i8* %frame_pointer) #3 {
-entry:
- %frame_pointer.addr = alloca i8*, align 8
- %abnormal_termination.addr = alloca i8, align 1
- store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
- %frombool = zext i1 %abnormal_termination to i8
- store i8 %frombool, i8* %abnormal_termination.addr, align 1
- %call = call i32 @puts(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @"\01??_C@_09KJEHOMHG@__finally?$AA@", i32 0, i32 0))
- ret void
-}
-
-declare i32 @puts(i8*) #3
-
-declare i32 @__C_specific_handler(...)
-
-; Function Attrs: nounwind readnone
-declare i8* @llvm.frameaddress(i32) #4
-
-; Function Attrs: nounwind readnone
-declare i32 @llvm.eh.typeid.for(i8*) #4
-
-attributes #0 = { noinline nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #1 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #2 = { noinline nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #3 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #4 = { nounwind readnone }
-attributes #5 = { noinline }
-attributes #6 = { nounwind }
--- /dev/null
+; RUN: llc -O0 -mtriple=x86_64-windows-msvc < %s | FileCheck %s
+
+declare void @g()
+define void @f() {
+ invoke void @g() to label %return unwind label %lpad
+
+return:
+ ret void
+
+lpad:
+ %ehptrs = landingpad {i8*, i32} personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
+ filter [0 x i8*] zeroinitializer
+ call void @__cxa_call_unexpected(i8* null)
+ unreachable
+}
+declare i32 @__C_specific_handler(...)
+declare void @__cxa_call_unexpected(i8*)
+
+; We don't emit entries for filters.
+; CHECK: .seh_handlerdata
+; CHECK: .long 0
unreachable
}
-; CHECK-LABEL: main:
+; CHECK: main:
+
+; FIXME: No handlers yet!
; CHECK: .seh_handlerdata
-; CHECK-NEXT: .long 1
-; CHECK-NEXT: .long .Ltmp0@IMGREL
-; CHECK-NEXT: .long .Ltmp1@IMGREL
-; CHECK-NEXT: .long main.cleanup@IMGREL
; CHECK-NEXT: .long 0
-; CHECK-LABEL: main.cleanup:
-; CHECK: callq puts
-; CHECK: retq
-
declare i32 @__C_specific_handler(...)
declare i32 @puts(i8*)
; CHECK: leaq [[rloc:.*\(%rsp\)]], %rcx
; CHECK: callq try_body
; CHECK-NEXT: .Ltmp1
-; CHECK: [[cont_bb:\.LBB0_[0-9]+]]:
+; CHECK: .LBB0_7:
; CHECK: movl [[rloc]], %eax
; CHECK: retq
; Landing pad code
-; CHECK: [[handler0:\.Ltmp[0-9]+]]: # Block address taken
+; CHECK: .Ltmp3:
+; CHECK: movl $1, %[[sel:[a-z]+]]
+; CHECK: .Ltmp4
+; CHECK: movl $2, %[[sel]]
+; CHECK: .L{{.*}}:
+; CHECK: cmpl $1, %[[sel]]
+
; CHECK: # %handler0
; CHECK: callq puts
; CHECK: movl $-1, [[rloc]]
-; CHECK: jmp [[cont_bb]]
+; CHECK: jmp .LBB0_7
+
+; CHECK: cmpl $2, %[[sel]]
-; CHECK: [[handler1:\.Ltmp[0-9]+]]: # Block address taken
; CHECK: # %handler1
; CHECK: callq puts
; CHECK: movl $-2, [[rloc]]
-; CHECK: jmp [[cont_bb]]
+; CHECK: jmp .LBB0_7
+
+; FIXME: EH preparation should eliminate the 'resume' instr and we should not do
+; the previous 'cmp;jeq'.
+; CHECK-NOT: _Unwind_Resume
+; CHECK: ud2
; CHECK: .seh_handlerdata
-; CHECK-NEXT: .long 2
-; CHECK-NEXT: .long .Ltmp0@IMGREL
-; CHECK-NEXT: .long .Ltmp1@IMGREL+1
-; CHECK-NEXT: .long safe_div_filt0@IMGREL
-; CHECK-NEXT: .long [[handler0]]@IMGREL
-; CHECK-NEXT: .long .Ltmp0@IMGREL
-; CHECK-NEXT: .long .Ltmp1@IMGREL+1
-; CHECK-NEXT: .long safe_div_filt1@IMGREL
-; CHECK-NEXT: .long [[handler1]]@IMGREL
+; CHECK: .long 2
+; CHECK: .long .Ltmp0@IMGREL
+; CHECK: .long .Ltmp1@IMGREL+1
+; CHECK: .long safe_div_filt0@IMGREL
+; CHECK: .long .Ltmp3@IMGREL
+; CHECK: .long .Ltmp0@IMGREL
+; CHECK: .long .Ltmp1@IMGREL+1
+; CHECK: .long safe_div_filt1@IMGREL
+; CHECK: .long .Ltmp4@IMGREL
; CHECK: .text
; CHECK: .seh_endproc
ret i32 0
}
+define void @_Unwind_Resume() {
+ call void @abort()
+ unreachable
+}
+
declare i32 @__C_specific_handler(...)
declare i32 @llvm.eh.typeid.for(i8*) readnone nounwind
declare void @puts(i8*)
; CHECK-LABEL: define i32 @use_seh()
; CHECK: invoke void @maybe_throw()
; CHECK-NEXT: to label %cont unwind label %lpad
-; CHECK: landingpad
-; CHECK-NEXT: cleanup
-; CHECK-NEXT: catch
-; CHECK-NEXT: call i8* (...) @llvm.eh.actions({{.*}})
+; CHECK: eh.resume:
+; CHECK-NEXT: unreachable
; A MinGW64-ish EH style. It could happen if a binary uses both MSVC CRT and
projects / llvm / commitdiff