Add the 'resume' instruction for the new EH rewrite.

This adds the 'resume' instruction class, IR parsing, and bitcode reading and
writing. The 'resume' instruction resumes propagation of an existing (in-flight)
exception whose unwinding was interrupted with a 'landingpad' instruction (to be
added later).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136589 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2011-07-31 06:30:59 +00:00
parent 6762dc1fb3
commit dccc03b242
24 changed files with 257 additions and 73 deletions

View File

@ -2508,6 +2508,14 @@ bool BitcodeReader::ParseFunctionBody(Function *F) {
cast<InvokeInst>(I)->setAttributes(PAL);
break;
}
case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
unsigned Idx = 0;
Value *Val = 0;
if (getValueTypePair(Record, Idx, NextValueNo, Val))
return Error("Invalid RESUME record");
I = ResumeInst::Create(Val);
break;
}
case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
I = new UnwindInst(Context);
InstructionList.push_back(I);

View File

@ -1143,6 +1143,10 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
}
break;
}
case Instruction::Resume:
Code = bitc::FUNC_CODE_INST_RESUME;
PushValueAndType(I.getOperand(0), InstID, Vals, VE);
break;
case Instruction::Unwind:
Code = bitc::FUNC_CODE_INST_UNWIND;
break;