X86/MCTargetDesc/X86AsmBackend.cpp

198   bool padInstructionViaRelaxation(MCRelaxableFragment &RF,
202   bool padInstructionViaPrefix(MCRelaxableFragment &RF, MCCodeEmitter &Emitter,
205   bool padInstructionEncoding(MCRelaxableFragment &RF, MCCodeEmitter &Emitter,
858 static bool isFullyRelaxed(const MCRelaxableFragment &RF) {
859   auto &Inst = RF.getInst();
860   auto &STI = *RF.getSubtargetInfo();
865 bool X86AsmBackend::padInstructionViaPrefix(MCRelaxableFragment &RF,
868   if (!RF.getAllowAutoPadding())
874   if (!isFullyRelaxed(RF))
877   const unsigned OldSize = RF.getContents().size();
885     Emitter.emitPrefix(RF.getInst(), VecOS, STI);
903   const uint8_t Prefix = determinePaddingPrefix(RF.getInst());
907   Code.append(RF.getContents().begin(), RF.getContents().end());
908   RF.getContents() = Code;
911   for (auto &F : RF.getFixups()) {
919 bool X86AsmBackend::padInstructionViaRelaxation(MCRelaxableFragment &RF,
922   if (isFullyRelaxed(RF))
927   MCInst Relaxed = RF.getInst();
928   relaxInstruction(Relaxed, *RF.getSubtargetInfo());
933   Emitter.encodeInstruction(Relaxed, VecOS, Fixups, *RF.getSubtargetInfo());
934   const unsigned OldSize = RF.getContents().size();
940   RF.setInst(Relaxed);
941   RF.getContents() = Code;
942   RF.getFixups() = Fixups;
947 bool X86AsmBackend::padInstructionEncoding(MCRelaxableFragment &RF,
952     Changed |= padInstructionViaRelaxation(RF, Emitter, RemainingSize);
954     Changed |= padInstructionViaPrefix(RF, Emitter, RemainingSize);
993         auto &RF = cast<MCRelaxableFragment>(*I);
994         Relaxable.push_back(&RF);
1026         auto &RF = *Relaxable.pop_back_val();
1030         if (padInstructionEncoding(RF, Asm.getEmitter(), RemainingSize))
1031           FirstChangedFragment = &RF;
1039         if (!isFullyRelaxed(RF))