Remove unncessary LLVM_FALLTHROUGH statements for empty switch cases

Author: aratajew

lib/SPIRV/SPIRVUtil.cpp

@@ -1631,20 +1631,16 @@ class SPIRVFriendlyIRMangleInfo : public BuiltinFuncMangleInfo {
     UnmangledName = UniqUnmangledName.str();
     switch (OC) {
     case OpConvertUToF:
-      LLVM_FALLTHROUGH;
     case OpUConvert:
-      LLVM_FALLTHROUGH;
     case OpSatConvertUToS:
       // Treat all arguments as unsigned
       addUnsignedArg(-1);
       break;
     case OpSubgroupShuffleINTEL:
-      LLVM_FALLTHROUGH;
     case OpSubgroupShuffleXorINTEL:
       addUnsignedArg(1);
       break;
     case OpSubgroupShuffleDownINTEL:
-      LLVM_FALLTHROUGH;
     case OpSubgroupShuffleUpINTEL:
       addUnsignedArg(2);
       break;
@@ -1660,32 +1656,22 @@ class SPIRVFriendlyIRMangleInfo : public BuiltinFuncMangleInfo {
       addUnsignedArg(0);
       break;
     case OpAtomicUMax:
-      LLVM_FALLTHROUGH;
     case OpAtomicUMin:
       addUnsignedArg(0);
       addUnsignedArg(3);
       break;
     case OpGroupUMax:
-      LLVM_FALLTHROUGH;
     case OpGroupUMin:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformBroadcast:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformBallotBitCount:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformShuffle:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformShuffleXor:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformShuffleUp:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformShuffleDown:
       addUnsignedArg(2);
       break;
     case OpGroupNonUniformInverseBallot:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformBallotFindLSB:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformBallotFindMSB:
       addUnsignedArg(1);
       break;
@@ -1694,36 +1680,22 @@ class SPIRVFriendlyIRMangleInfo : public BuiltinFuncMangleInfo {
       addUnsignedArg(2);
       break;
     case OpGroupNonUniformIAdd:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformFAdd:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformIMul:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformFMul:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformSMin:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformFMin:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformSMax:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformFMax:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformBitwiseAnd:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformBitwiseOr:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformBitwiseXor:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformLogicalAnd:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformLogicalOr:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformLogicalXor:
       addUnsignedArg(3);
       break;
     case OpGroupNonUniformUMax:
-      LLVM_FALLTHROUGH;
     case OpGroupNonUniformUMin:
       addUnsignedArg(2);
       addUnsignedArg(3);
@@ -1753,11 +1725,8 @@ class OpenCLStdToSPIRVFriendlyIRMangleInfo : public BuiltinFuncMangleInfo {
   bool needRetTypePostfix() {
     switch (ExtOpId) {
     case OpenCLLIB::Vload_half:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::Vload_halfn:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::Vloada_halfn:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::Vloadn:
       return true;
     default:
@@ -1768,33 +1737,19 @@ class OpenCLStdToSPIRVFriendlyIRMangleInfo : public BuiltinFuncMangleInfo {
   void init(StringRef) override {
     switch (ExtOpId) {
     case OpenCLLIB::UAbs:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UAbs_diff:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UAdd_sat:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UHadd:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::URhadd:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UClamp:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UMad_hi:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UMad_sat:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UMax:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UMin:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UMul_hi:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::USub_sat:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::U_Upsample:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UMad24:
-      LLVM_FALLTHROUGH;
     case OpenCLLIB::UMul24:
       // Treat all arguments as unsigned
       addUnsignedArg(-1);