Initial commit of the 'landingpad' instruction.

This implements the 'landingpad' instruction. It's used to indicate that a basic
block is a landing pad. There are several restrictions on its use (see
LangRef.html for more detail). These restrictions allow the exception handling
code to gather the information it needs in a much more sane way.

This patch has the definition, implementation, C interface, parsing, and bitcode
support in it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137501 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 6 insertions, 0 deletions

diff --git a/include/llvm/Support/IRBuilder.h b/include/llvm/Support/IRBuilder.h
index 133b1c3fd5..782800173f 100644
--- a/include/llvm/Support/IRBuilder.h
+++ b/include/llvm/Support/IRBuilder.h
@@ -1204,6 +1204,11 @@ public:
     return Insert(InsertValueInst::Create(Agg, Val, Idxs), Name);
   }
 
+  LandingPadInst *CreateLandingPad(Type *Ty, Value *PersFn, unsigned NumClauses,
+                                   const Twine &Name = "") {
+    return Insert(LandingPadInst::Create(Ty, PersFn, NumClauses, Name));
+  }
+
   //===--------------------------------------------------------------------===//
   // Utility creation methods
   //===--------------------------------------------------------------------===//
diff --git a/include/llvm/Support/InstVisitor.h b/include/llvm/Support/InstVisitor.h
index 591de6f40d..a661c4fac6 100644
--- a/include/llvm/Support/InstVisitor.h
+++ b/include/llvm/Support/InstVisitor.h
@@ -195,6 +195,7 @@ public:
   RetTy visitShuffleVectorInst(ShuffleVectorInst &I) { DELEGATE(Instruction); }
   RetTy visitExtractValueInst(ExtractValueInst &I)  { DELEGATE(Instruction);}
   RetTy visitInsertValueInst(InsertValueInst &I)    { DELEGATE(Instruction); }
+  RetTy visitLandingPadInst(LandingPadInst &I)      { DELEGATE(Instruction); }
 
   // Next level propagators: If the user does not overload a specific
   // instruction type, they can overload one of these to get the whole class