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MIR Serialization: Serialize the machine basic block's successor weights.

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Reviewers: Duncan P. N. Exon Smith


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243659 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alex Lorenz
2015-07-30 16:54:38 +00:00
parent cfe562c99b
commit fbd94791e6
7 changed files with 193 additions and 2 deletions
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14
lib/CodeGen/MIRParser/MIRParser.cpp
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@@ -356,12 +356,24 @@ bool MIRParserImpl::initializeMachineBasicBlock(
MBB.setIsLandingPad(YamlMBB.IsLandingPad);
SMDiagnostic Error;
// Parse the successors.
const auto &Weights = YamlMBB.SuccessorWeights;
bool HasWeights = !Weights.empty();
if (HasWeights && Weights.size() != YamlMBB.Successors.size()) {
bool IsFew = Weights.size() < YamlMBB.Successors.size();
return error(IsFew ? Weights.back().SourceRange.End
: Weights[YamlMBB.Successors.size()].SourceRange.Start,
Twine("too ") + (IsFew ? "few" : "many") +
" successor weights, expected " +
Twine(YamlMBB.Successors.size()) + ", have " +
Twine(Weights.size()));
}
size_t SuccessorIndex = 0;
for (const auto &MBBSource : YamlMBB.Successors) {
MachineBasicBlock *SuccMBB = nullptr;
if (parseMBBReference(SuccMBB, MBBSource, MF, PFS))
return true;
// TODO: Report an error when adding the same successor more than once.
MBB.addSuccessor(SuccMBB);
MBB.addSuccessor(SuccMBB, HasWeights ? Weights[SuccessorIndex++].Value : 0);
}
// Parse the liveins.
for (const auto &LiveInSource : YamlMBB.LiveIns) {