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[llvm-c][Disassembler] When printing latency information, skip scheduling

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classes that are marked as Variant as those require an MI to pass to
SubTargetInfo::resolveSchedClass.

This is part of <rdar://problem/14687488>.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191864 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Quentin Colombet 2013-10-02 23:11:47 +00:00
parent 407847f130
commit 4897e26390
1 changed files with 3 additions and 1 deletions
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4
lib/MC/MCDisassembler/Disassembler.cpp
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@ -191,7 +191,9 @@ static int getLatency(LLVMDisasmContext *DC, const MCInst &Inst) {
const MCInstrDesc& Desc = DC->getInstrInfo()->get(Inst.getOpcode());
unsigned SCClass = Desc.getSchedClass();
const MCSchedClassDesc *SCDesc = SCModel->getSchedClassDesc(SCClass);
if (!SCDesc || !SCDesc->isValid())
// Resolving the variant SchedClass requires an MI to pass to
// SubTargetInfo::resolveSchedClass.
if (!SCDesc || !SCDesc->isValid() || SCDesc->isVariant())
return NoInformationAvailable;
// Compute output latency.