[llvm-commits] [llvm] r129235 - in /llvm/trunk: include/llvm/BasicBlock.h include/llvm/Bitcode/LLVMBitCodes.h lib/AsmParser/LLLexer.cpp lib/AsmParser/LLParser.cpp lib/AsmParser/LLToken.h lib/Bitcode/Reader/BitcodeReader.cpp lib/Bitcode/Writer/Bit

[Jay Foad]

> There is an issue, but I would say that the issue is in getting
> the right exception value / selector value at the point where decisions about
> branching to catch clauses is made,

I've been wondering for a while if these things could be represented
as new kinds of Value:

class ExceptionPointer : public User { ... } // or "ExceptionValue" in
your terminology
class ExceptionIndex : public User { ... } // or "SelectorValue"

which have a single operand which is a BasicBlock, and represent the
exception/selector value from when that basic block was (last) jumped
to as a landing pad. I think this would codegen quite
straightforwardly.

Jay.