[WinEH] Use operand bundles to describe call sites

SimplifyCFG allows tail merging with code which terminates in
unreachable which, in turn, makes it possible for an invoke to end up in
a funclet which it was not originally part of.

Using operand bundles on invokes allows us to determine whether or not
an invoke was part of a funclet in the source program.

Furthermore, it allows us to unambiguously answer questions about the
legality of inlining into call sites which the personality may have
trouble with.

Differential Revision: http://reviews.llvm.org/D15517

llvm-svn: 255674
diff --git a/llvm/test/CodeGen/X86/win-catchpad-nested-cxx.ll b/llvm/test/CodeGen/X86/win-catchpad-nested-cxx.ll
index 22ce7e5..ac45983 100644
--- a/llvm/test/CodeGen/X86/win-catchpad-nested-cxx.ll
+++ b/llvm/test/CodeGen/X86/win-catchpad-nested-cxx.ll
@@ -31,7 +31,7 @@
   %cs1 = catchswitch within none [label %handler1] unwind to caller
 handler1:
   %h1 = catchpad within %cs1 [i8* null, i32 64, i8* null]
-  invoke void @f(i32 2)
+  invoke void @f(i32 2) [ "funclet"(token %h1) ]
           to label %catchret1 unwind label %catch.dispatch.2
 catchret1:
   catchret from %h1 to label %try.cont