[WinEH] Generate .xdata for catch handlers

This lets us catch exceptions in simple cases.

N.B. Things that do not work include (but are not limited to):
- Throwing from within a catch handler.
- Catching an object with a named catch parameter.
- 'CatchHigh' is fictitious, we aren't sure of its purpose.
- We aren't entirely efficient with regards to the number of EH states
  that we generate.
- IP-to-State tables are sensitive to the order of emission.

llvm-svn: 233767

1 files changed, 0 insertions, 7 deletions

diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 15fbea33d89..1cdb99c4366 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -3228,13 +3228,6 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
     break;
   }
 
-  case Intrinsic::eh_parentframe: {
-    auto *AI = dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
-    Assert(AI && AI->isStaticAlloca(),
-           "llvm.eh.parentframe requires a static alloca", &CI);
-    break;
-  }
-
   case Intrinsic::eh_unwindhelp: {
     auto *AI = dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
     Assert(AI && AI->isStaticAlloca(),