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Initial commit of the 'landingpad' instruction.

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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
This commit is contained in:
Bill Wendling
2011-08-12 20:24:12 +00:00
parent 79628e92e1
commit e6e8826870
23 changed files with 454 additions and 20 deletions
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17
lib/Bitcode/Writer/BitcodeWriter.cpp
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@ -1165,6 +1165,23 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
break;
}
case Instruction::LandingPad: {
const LandingPadInst &LP = cast<LandingPadInst>(I);
Code = bitc::FUNC_CODE_INST_LANDINGPAD;
Vals.push_back(VE.getTypeID(LP.getType()));
PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE);
Vals.push_back(LP.isCleanup());
Vals.push_back(LP.getNumClauses());
for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
if (LP.isCatch(I))
Vals.push_back(LandingPadInst::Catch);
else
Vals.push_back(LandingPadInst::Filter);
PushValueAndType(LP.getClause(I), InstID, Vals, VE);
}
break;
}
case Instruction::Alloca:
Code = bitc::FUNC_CODE_INST_ALLOCA;
Vals.push_back(VE.getTypeID(I.getType()));