[CIR][NFC] Refactor code for populating LLVM conversion patterns (llvm#1152)

The function `populateCIRToLLVMConversionPatterns` contains a spaghetti
of LLVM dialect conversion patterns, which results in merge conflicts
very easily. Besides, a few patterns are even registered for more than
once, possibly due to careless resolution of merge conflicts.

This PR attempts to mitigate this problem. Pattern names now are sorted
in alphabetical order, and each source code line now only lists exactly
one pattern name to reduce potential merge conflicts.

Author: Lancern

clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp

@@ -3860,55 +3860,98 @@ void populateCIRToLLVMConversionPatterns(
                                           stringGlobalsMap, argStringGlobalsMap,
                                           argsVarMap, patterns.getContext());
   patterns.add<
-      CIRToLLVMCmpOpLowering, CIRToLLVMSelectOpLowering,
-      CIRToLLVMBitClrsbOpLowering, CIRToLLVMBitClzOpLowering,
-      CIRToLLVMBitCtzOpLowering, CIRToLLVMBitFfsOpLowering,
-      CIRToLLVMBitParityOpLowering, CIRToLLVMBitPopcountOpLowering,
-      CIRToLLVMAtomicCmpXchgLowering, CIRToLLVMAtomicXchgLowering,
-      CIRToLLVMAtomicFetchLowering, CIRToLLVMByteswapOpLowering,
-      CIRToLLVMRotateOpLowering, CIRToLLVMBrCondOpLowering,
-      CIRToLLVMPtrStrideOpLowering, CIRToLLVMCallOpLowering,
-      CIRToLLVMTryCallOpLowering, CIRToLLVMEhInflightOpLowering,
-      CIRToLLVMUnaryOpLowering, CIRToLLVMBinOpLowering,
-      CIRToLLVMBinOpOverflowOpLowering, CIRToLLVMShiftOpLowering,
-      CIRToLLVMLoadOpLowering, CIRToLLVMConstantOpLowering,
-      CIRToLLVMStoreOpLowering, CIRToLLVMFuncOpLowering,
-      CIRToLLVMCastOpLowering, CIRToLLVMGlobalOpLowering,
-      CIRToLLVMGetGlobalOpLowering, CIRToLLVMComplexCreateOpLowering,
-      CIRToLLVMComplexRealOpLowering, CIRToLLVMComplexImagOpLowering,
-      CIRToLLVMComplexRealPtrOpLowering, CIRToLLVMComplexImagPtrOpLowering,
-      CIRToLLVMVAStartOpLowering, CIRToLLVMVAEndOpLowering,
-      CIRToLLVMVACopyOpLowering, CIRToLLVMVAArgOpLowering,
-      CIRToLLVMBrOpLowering, CIRToLLVMGetMemberOpLowering,
-      CIRToLLVMGetRuntimeMemberOpLowering, CIRToLLVMSwitchFlatOpLowering,
-      CIRToLLVMPtrDiffOpLowering, CIRToLLVMCopyOpLowering,
-      CIRToLLVMMemCpyOpLowering, CIRToLLVMMemChrOpLowering,
-      CIRToLLVMAbsOpLowering, CIRToLLVMExpectOpLowering,
-      CIRToLLVMVTableAddrPointOpLowering, CIRToLLVMVecCreateOpLowering,
-      CIRToLLVMVecCmpOpLowering, CIRToLLVMVecSplatOpLowering,
-      CIRToLLVMVecTernaryOpLowering, CIRToLLVMVecShuffleDynamicOpLowering,
-      CIRToLLVMVecShuffleOpLowering, CIRToLLVMStackSaveOpLowering,
-      CIRToLLVMUnreachableOpLowering, CIRToLLVMTrapOpLowering,
-      CIRToLLVMInlineAsmOpLowering, CIRToLLVMSetBitfieldOpLowering,
-      CIRToLLVMGetBitfieldOpLowering, CIRToLLVMPrefetchOpLowering,
-      CIRToLLVMObjSizeOpLowering, CIRToLLVMIsConstantOpLowering,
-      CIRToLLVMCmpThreeWayOpLowering, CIRToLLVMMemCpyOpLowering,
-      CIRToLLVMIsConstantOpLowering, CIRToLLVMCmpThreeWayOpLowering,
-      CIRToLLVMReturnAddrOpLowering, CIRToLLVMClearCacheOpLowering,
-      CIRToLLVMEhTypeIdOpLowering, CIRToLLVMCatchParamOpLowering,
-      CIRToLLVMResumeOpLowering, CIRToLLVMAllocExceptionOpLowering,
-      CIRToLLVMFreeExceptionOpLowering, CIRToLLVMThrowOpLowering,
-      CIRToLLVMLLVMIntrinsicCallOpLowering, CIRToLLVMAssumeOpLowering,
-      CIRToLLVMAssumeAlignedOpLowering, CIRToLLVMAssumeSepStorageOpLowering,
-      CIRToLLVMBaseClassAddrOpLowering, CIRToLLVMDerivedClassAddrOpLowering,
-      CIRToLLVMVTTAddrPointOpLowering, CIRToLLVMIsFPClassOpLowering,
-      CIRToLLVMAbsOpLowering, CIRToLLVMMemMoveOpLowering,
-      CIRToLLVMMemSetOpLowering, CIRToLLVMMemSetInlineOpLowering,
-      CIRToLLVMMemCpyInlineOpLowering, CIRToLLVMSignBitOpLowering,
-      CIRToLLVMPtrMaskOpLowering
+      // clang-format off
+      CIRToLLVMAbsOpLowering,
+      CIRToLLVMAllocExceptionOpLowering,
+      CIRToLLVMAssumeAlignedOpLowering,
+      CIRToLLVMAssumeOpLowering,
+      CIRToLLVMAssumeSepStorageOpLowering,
+      CIRToLLVMAtomicCmpXchgLowering,
+      CIRToLLVMAtomicFetchLowering,
+      CIRToLLVMAtomicXchgLowering,
+      CIRToLLVMBaseClassAddrOpLowering,
+      CIRToLLVMBinOpLowering,
+      CIRToLLVMBinOpOverflowOpLowering,
+      CIRToLLVMBitClrsbOpLowering,
+      CIRToLLVMBitClzOpLowering,
+      CIRToLLVMBitCtzOpLowering,
+      CIRToLLVMBitFfsOpLowering,
+      CIRToLLVMBitParityOpLowering,
+      CIRToLLVMBitPopcountOpLowering,
+      CIRToLLVMBrCondOpLowering,
+      CIRToLLVMBrOpLowering,
+      CIRToLLVMByteswapOpLowering,
+      CIRToLLVMCallOpLowering,
+      CIRToLLVMCastOpLowering,
+      CIRToLLVMCatchParamOpLowering,
+      CIRToLLVMClearCacheOpLowering,
+      CIRToLLVMCmpOpLowering,
+      CIRToLLVMCmpThreeWayOpLowering,
+      CIRToLLVMComplexCreateOpLowering,
+      CIRToLLVMComplexImagOpLowering,
+      CIRToLLVMComplexImagPtrOpLowering,
+      CIRToLLVMComplexRealOpLowering,
+      CIRToLLVMComplexRealPtrOpLowering,
+      CIRToLLVMConstantOpLowering,
+      CIRToLLVMCopyOpLowering,
+      CIRToLLVMDerivedClassAddrOpLowering,
+      CIRToLLVMEhInflightOpLowering,
+      CIRToLLVMEhTypeIdOpLowering,
+      CIRToLLVMExpectOpLowering,
+      CIRToLLVMFreeExceptionOpLowering,
+      CIRToLLVMFuncOpLowering,
+      CIRToLLVMGetBitfieldOpLowering,
+      CIRToLLVMGetGlobalOpLowering,
+      CIRToLLVMGetMemberOpLowering,
+      CIRToLLVMGetRuntimeMemberOpLowering,
+      CIRToLLVMGlobalOpLowering,
+      CIRToLLVMInlineAsmOpLowering,
+      CIRToLLVMIsConstantOpLowering,
+      CIRToLLVMIsFPClassOpLowering,
+      CIRToLLVMLLVMIntrinsicCallOpLowering,
+      CIRToLLVMLoadOpLowering,
+      CIRToLLVMMemChrOpLowering,
+      CIRToLLVMMemCpyInlineOpLowering,
+      CIRToLLVMMemCpyOpLowering,
+      CIRToLLVMMemMoveOpLowering,
+      CIRToLLVMMemSetInlineOpLowering,
+      CIRToLLVMMemSetOpLowering,
+      CIRToLLVMObjSizeOpLowering,
+      CIRToLLVMPrefetchOpLowering,
+      CIRToLLVMPtrDiffOpLowering,
+      CIRToLLVMPtrMaskOpLowering,
+      CIRToLLVMPtrStrideOpLowering,
+      CIRToLLVMResumeOpLowering,
+      CIRToLLVMReturnAddrOpLowering,
+      CIRToLLVMRotateOpLowering,
+      CIRToLLVMSelectOpLowering,
+      CIRToLLVMSetBitfieldOpLowering,
+      CIRToLLVMShiftOpLowering,
+      CIRToLLVMSignBitOpLowering,
+      CIRToLLVMStackSaveOpLowering,
+      CIRToLLVMStoreOpLowering,
+      CIRToLLVMSwitchFlatOpLowering,
+      CIRToLLVMThrowOpLowering,
+      CIRToLLVMTrapOpLowering,
+      CIRToLLVMTryCallOpLowering,
+      CIRToLLVMUnaryOpLowering,
+      CIRToLLVMUnreachableOpLowering,
+      CIRToLLVMVAArgOpLowering,
+      CIRToLLVMVACopyOpLowering,
+      CIRToLLVMVAEndOpLowering,
+      CIRToLLVMVAStartOpLowering,
+      CIRToLLVMVecCmpOpLowering,
+      CIRToLLVMVecCreateOpLowering,
+      CIRToLLVMVecShuffleDynamicOpLowering,
+      CIRToLLVMVecShuffleOpLowering,
+      CIRToLLVMVecSplatOpLowering,
+      CIRToLLVMVecTernaryOpLowering,
+      CIRToLLVMVTableAddrPointOpLowering,
+      CIRToLLVMVTTAddrPointOpLowering
 #define GET_BUILTIN_LOWERING_LIST
 #include "clang/CIR/Dialect/IR/CIRBuiltinsLowering.inc"
 #undef GET_BUILTIN_LOWERING_LIST
+      // clang-format on
       >(converter, patterns.getContext());
 }