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Expand the Flags field of MCInstrDesc to 64 bits, while simultaneously 

shrinking the Size and NumDefs fields to offset the size growth, and
reordering the fields to preserve a good packing.

This is necessary in the short term for adding a convergent flag, and
simultaneously future-proofs us against more flags being added in the
future.

llvm-svn: 238445
This commit is contained in:
Owen Anderson 2015-05-28 18:03:07 +00:00
parent aa486e9bd0
commit ca5480062a
2 changed files with 5 additions and 5 deletions
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6
llvm/include/llvm/MC/MCInstrDesc.h
View File

@ -138,10 +138,10 @@ class MCInstrDesc {
public:
unsigned short Opcode; // The opcode number
unsigned short NumOperands; // Num of args (may be more if variable_ops)
unsigned short NumDefs; // Num of args that are definitions
unsigned char NumDefs; // Num of args that are definitions
unsigned char Size; // Number of bytes in encoding.
unsigned short SchedClass; // enum identifying instr sched class
unsigned short Size; // Number of bytes in encoding.
unsigned Flags; // Flags identifying machine instr class
uint64_t Flags; // Flags identifying machine instr class
uint64_t TSFlags; // Target Specific Flag values
const uint16_t *ImplicitUses; // Registers implicitly read by this instr
const uint16_t *ImplicitDefs; // Registers implicitly defined by this instr

4
llvm/utils/TableGen/InstrInfoEmitter.cpp
View File

@ -475,8 +475,8 @@ void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
OS << " { ";
OS << Num << ",\t" << MinOperands << ",\t"
<< Inst.Operands.NumDefs << ",\t"
<< SchedModels.getSchedClassIdx(Inst) << ",\t"
<< Inst.TheDef->getValueAsInt("Size") << ",\t0";
<< Inst.TheDef->getValueAsInt("Size") << ",\t"
<< SchedModels.getSchedClassIdx(Inst) << ",\t0";
// Emit all of the target independent flags...
if (Inst.isPseudo) OS << "|(1<<MCID::Pseudo)";