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Summary: Before this patch, `relaxInstruction` takes three arguments, the first argument refers to the instruction before relaxation and the third argument is the output instruction after relaxation. There are two quite strange things: 1) The first argument's type is `const MCInst &`, the third argument's type is `MCInst &`, but they may be aliased to the same variable 2) The backends of ARM, AMDGPU, RISC-V, Hexagon assume that the third argument is a fresh uninitialized `MCInst` even if `relaxInstruction` may be called like `relaxInstruction(Relaxed, STI, Relaxed)` in a loop. In this patch, we drop the thrid argument, and let `relaxInstruction` directly modify the given instruction. Also, this patch fixes the bug https://bugs.llvm.org/show_bug.cgi?id=45580, which is introduced by D77851, and breaks the assumption of ARM, AMDGPU, RISC-V, Hexagon. Reviewers: Razer6, MaskRay, jyknight, asb, luismarques, enderby, rtaylor, colinl, bcain Reviewed By: Razer6, MaskRay, bcain Subscribers: bcain, nickdesaulniers, nathanchance, wuzish, annita.zhang, arsenm, dschuff, jyknight, dylanmckay, sdardis, nemanjai, jvesely, nhaehnle, tpr, sbc100, jgravelle-google, kristof.beyls, hiraditya, aheejin, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, kerbowa, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D78364 |
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| .. | ||
| AsmParser | ||
| Disassembler | ||
| MCTargetDesc | ||
| TargetInfo | ||
| BitTracker.cpp | ||
| BitTracker.h | ||
| CMakeLists.txt | ||
| Hexagon.h | ||
| Hexagon.td | ||
| HexagonArch.h | ||
| HexagonAsmPrinter.cpp | ||
| HexagonAsmPrinter.h | ||
| HexagonBitSimplify.cpp | ||
| HexagonBitTracker.cpp | ||
| HexagonBitTracker.h | ||
| HexagonBlockRanges.cpp | ||
| HexagonBlockRanges.h | ||
| HexagonBranchRelaxation.cpp | ||
| HexagonCallingConv.td | ||
| HexagonCFGOptimizer.cpp | ||
| HexagonCommonGEP.cpp | ||
| HexagonConstExtenders.cpp | ||
| HexagonConstPropagation.cpp | ||
| HexagonCopyToCombine.cpp | ||
| HexagonDepArch.h | ||
| HexagonDepArch.td | ||
| HexagonDepDecoders.inc | ||
| HexagonDepIICHVX.td | ||
| HexagonDepIICScalar.td | ||
| HexagonDepInstrFormats.td | ||
| HexagonDepInstrInfo.td | ||
| HexagonDepITypes.h | ||
| HexagonDepITypes.td | ||
| HexagonDepMapAsm2Intrin.td | ||
| HexagonDepMappings.td | ||
| HexagonDepMask.h | ||
| HexagonDepOperands.td | ||
| HexagonDepTimingClasses.h | ||
| HexagonEarlyIfConv.cpp | ||
| HexagonExpandCondsets.cpp | ||
| HexagonFixupHwLoops.cpp | ||
| HexagonFrameLowering.cpp | ||
| HexagonFrameLowering.h | ||
| HexagonGenExtract.cpp | ||
| HexagonGenInsert.cpp | ||
| HexagonGenMux.cpp | ||
| HexagonGenPredicate.cpp | ||
| HexagonHardwareLoops.cpp | ||
| HexagonHazardRecognizer.cpp | ||
| HexagonHazardRecognizer.h | ||
| HexagonIICHVX.td | ||
| HexagonIICScalar.td | ||
| HexagonInstrFormats.td | ||
| HexagonInstrFormatsV60.td | ||
| HexagonInstrFormatsV65.td | ||
| HexagonInstrInfo.cpp | ||
| HexagonInstrInfo.h | ||
| HexagonIntrinsics.td | ||
| HexagonIntrinsicsV5.td | ||
| HexagonIntrinsicsV60.td | ||
| HexagonISelDAGToDAG.cpp | ||
| HexagonISelDAGToDAG.h | ||
| HexagonISelDAGToDAGHVX.cpp | ||
| HexagonISelLowering.cpp | ||
| HexagonISelLowering.h | ||
| HexagonISelLoweringHVX.cpp | ||
| HexagonLoopIdiomRecognition.cpp | ||
| HexagonMachineFunctionInfo.cpp | ||
| HexagonMachineFunctionInfo.h | ||
| HexagonMachineScheduler.cpp | ||
| HexagonMachineScheduler.h | ||
| HexagonMapAsm2IntrinV62.gen.td | ||
| HexagonMapAsm2IntrinV65.gen.td | ||
| HexagonMCInstLower.cpp | ||
| HexagonNewValueJump.cpp | ||
| HexagonOperands.td | ||
| HexagonOptAddrMode.cpp | ||
| HexagonOptimizeSZextends.cpp | ||
| HexagonPatterns.td | ||
| HexagonPatternsHVX.td | ||
| HexagonPatternsV65.td | ||
| HexagonPeephole.cpp | ||
| HexagonPseudo.td | ||
| HexagonRDFOpt.cpp | ||
| HexagonRegisterInfo.cpp | ||
| HexagonRegisterInfo.h | ||
| HexagonRegisterInfo.td | ||
| HexagonSchedule.td | ||
| HexagonScheduleV5.td | ||
| HexagonScheduleV55.td | ||
| HexagonScheduleV60.td | ||
| HexagonScheduleV62.td | ||
| HexagonScheduleV65.td | ||
| HexagonScheduleV66.td | ||
| HexagonScheduleV67.td | ||
| HexagonScheduleV67T.td | ||
| HexagonSelectionDAGInfo.cpp | ||
| HexagonSelectionDAGInfo.h | ||
| HexagonSplitConst32AndConst64.cpp | ||
| HexagonSplitDouble.cpp | ||
| HexagonStoreWidening.cpp | ||
| HexagonSubtarget.cpp | ||
| HexagonSubtarget.h | ||
| HexagonTargetMachine.cpp | ||
| HexagonTargetMachine.h | ||
| HexagonTargetObjectFile.cpp | ||
| HexagonTargetObjectFile.h | ||
| HexagonTargetStreamer.h | ||
| HexagonTargetTransformInfo.cpp | ||
| HexagonTargetTransformInfo.h | ||
| HexagonVectorLoopCarriedReuse.cpp | ||
| HexagonVectorPrint.cpp | ||
| HexagonVExtract.cpp | ||
| HexagonVLIWPacketizer.cpp | ||
| HexagonVLIWPacketizer.h | ||
| LLVMBuild.txt | ||
| RDFCopy.cpp | ||
| RDFCopy.h | ||
| RDFDeadCode.cpp | ||
| RDFDeadCode.h | ||