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[TableGen] List the indices of sub-operands #163723

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Merged
merged 3 commits into from
Oct 21, 2025
Merged

[TableGen] List the indices of sub-operands #163723

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d940ad2
[TableGen] List the indices of sub-operands
statham-arm Oct 15, 2025
620553a
Fix build failure in CI
statham-arm Oct 16, 2025
177955b
Use NamespaceEmitter as suggested in review
statham-arm Oct 20, 2025
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2 changes: 1 addition & 1 deletion llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -882,7 +882,7 @@ static bool producesFalseLanesZero(MachineInstr &MI,
continue;
// Skip the lr predicate reg
int PIdx = llvm::findFirstVPTPredOperandIdx(MI);
if (PIdx != -1 && (int)MO.getOperandNo() == PIdx + 2)
if (PIdx != -1 && MO.getOperandNo() == PIdx + ARM::SUBOP_vpred_n_tp_reg)
continue;

// Check that this instruction will produce zeros in its false lanes:
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2 changes: 1 addition & 1 deletion llvm/lib/Target/ARM/MVETPAndVPTOptimisationsPass.cpp
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Expand Up @@ -534,7 +534,7 @@ bool MVETPAndVPTOptimisations::ConvertTailPredLoop(MachineLoop *ML,
Register LR = LoopPhi->getOperand(0).getReg();
for (MachineInstr *MI : MVEInstrs) {
int Idx = findFirstVPTPredOperandIdx(*MI);
MI->getOperand(Idx + 2).setReg(LR);
MI->getOperand(Idx + ARM::SUBOP_vpred_n_tp_reg).setReg(LR);
}
}

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17 changes: 17 additions & 0 deletions llvm/utils/TableGen/InstrInfoEmitter.cpp
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Expand Up @@ -29,6 +29,7 @@
#include "llvm/Support/Format.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TableGen/CodeGenHelpers.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/TGTimer.h"
Expand Down Expand Up @@ -1135,6 +1136,22 @@ void InstrInfoEmitter::run(raw_ostream &OS) {

OS << "\n};\n} // end namespace llvm\n";

{
NamespaceEmitter LlvmNS(OS, "llvm");
NamespaceEmitter TargetNS(OS, Target.getInstNamespace());
for (const Record *R : Records.getAllDerivedDefinitions("Operand")) {
if (R->isAnonymous())
continue;
if (const DagInit *D = R->getValueAsDag("MIOperandInfo")) {
for (unsigned i = 0, e = D->getNumArgs(); i < e; ++i) {
if (const StringInit *Name = D->getArgName(i))
OS << "constexpr unsigned SUBOP_" << R->getName() << "_"
<< Name->getValue() << " = " << i << ";\n";
}
}
}
}

OS << "#endif // GET_INSTRINFO_HEADER\n\n";

OS << "#ifdef GET_INSTRINFO_HELPER_DECLS\n";
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