From 2ac0e6be05d53323d305155fcf53d50c87d6a9b2 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Wed, 17 Aug 2011 21:56:44 +0000 Subject: Add the support in code-gen for the landingpad instruction lowering. The landingpad instruction is lowered into the EXCEPTIONADDR and EHSELECTION SDNodes. The information from the landingpad instruction is harvested by the 'AddLandingPadInfo' function. The new EH uses the current EH scheme in the back-end. This will change once we switch over to the new scheme. (Reviewed by Jakob!) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137880 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp | 31 +++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp') diff --git a/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp b/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp index d5bf12055e..10b251d1bf 100644 --- a/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp +++ b/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp @@ -454,3 +454,34 @@ void llvm::CopyCatchInfo(const BasicBlock *SuccBB, const BasicBlock *LPad, break; } } + +/// AddLandingPadInfo - Extract the exception handling information from the +/// landingpad instruction and add them to the specified machine module info. +void llvm::AddLandingPadInfo(const LandingPadInst &I, MachineModuleInfo &MMI, + MachineBasicBlock *MBB) { + MMI.addPersonality(MBB, + cast(I.getPersonalityFn()->stripPointerCasts())); + + if (I.isCleanup()) + MMI.addCleanup(MBB); + + // FIXME: New EH - Add the clauses in reverse order. This isn't 100% correct, + // but we need to do it this way because of how the DWARF EH emitter + // processes the clauses. + for (unsigned i = I.getNumClauses(); i != 0; --i) { + Value *Val = I.getClause(i - 1); + if (I.isCatch(i - 1)) { + MMI.addCatchTypeInfo(MBB, + dyn_cast(Val->stripPointerCasts())); + } else { + // Add filters in a list. + Constant *CVal = cast(Val); + SmallVector FilterList; + for (User::op_iterator + II = CVal->op_begin(), IE = CVal->op_end(); II != IE; ++II) + FilterList.push_back(cast((*II)->stripPointerCasts())); + + MMI.addFilterTypeInfo(MBB, FilterList); + } + } +} -- cgit v1.2.3-70-g09d2