Revert "Add support for SPV_INTEL_fpga_buffer_location extension"

This reverts commit f71cec5.

Author: MrSidims

llvm-spirv/include/LLVMSPIRVExtensions.inc

@@ -23,4 +23,3 @@ EXT(SPV_INTEL_optimization_hints)
 EXT(SPV_INTEL_float_controls2)
 EXT(SPV_INTEL_vector_compute)
 EXT(SPV_INTEL_usm_storage_classes)
-EXT(SPV_INTEL_fpga_buffer_location)

llvm-spirv/lib/SPIRV/SPIRVReader.cpp

@@ -168,27 +168,6 @@ static void addOCLKernelArgumentMetadata(
   Fn->setMetadata(MDName, MDNode::get(*Context, ValueVec));
 }
 
-static void addBufferLocationMetadata(
-    LLVMContext *Context, SPIRVFunction *BF, llvm::Function *Fn,
-    std::function<Metadata *(SPIRVFunctionParameter *)> Func) {
-  std::vector<Metadata *> ValueVec;
-  bool DecorationFound = false;
-  BF->foreachArgument([&](SPIRVFunctionParameter *Arg) {
-    if (Arg->getType()->isTypePointer() &&
-        Arg->hasDecorate(DecorationBufferLocationINTEL)) {
-      DecorationFound = true;
-      ValueVec.push_back(Func(Arg));
-    } else {
-      llvm::Metadata *DefaultNode = ConstantAsMetadata::get(
-          ConstantInt::get(Type::getInt32Ty(*Context), -1));
-      ValueVec.push_back(DefaultNode);
-    }
-  });
-  if (DecorationFound)
-    Fn->setMetadata("kernel_arg_buffer_location",
-                    MDNode::get(*Context, ValueVec));
-}
-
 Value *SPIRVToLLVM::getTranslatedValue(SPIRVValue *BV) {
   auto Loc = ValueMap.find(BV);
   if (Loc != ValueMap.end())
@@ -3540,15 +3519,6 @@ bool SPIRVToLLVM::transOCLMetadata(SPIRVFunction *BF) {
                                                         Arg->getName());
                                  });
   }
-  // Generate metadata for kernel_arg_buffer_location
-  addBufferLocationMetadata(Context, BF, F, [=](SPIRVFunctionParameter *Arg) {
-    auto Literals = Arg->getDecorationLiterals(DecorationBufferLocationINTEL);
-    assert(Literals.size() == 1 &&
-           "BufferLocationINTEL decoration shall have 1 ID literal");
-
-    return ConstantAsMetadata::get(
-        ConstantInt::get(Type::getInt32Ty(*Context), Literals[0]));
-  });
   return true;
 }
 

llvm-spirv/lib/SPIRV/SPIRVWriter.cpp

@@ -527,13 +527,6 @@ SPIRVFunction *LLVMToSPIRV::transFunctionDecl(Function *F) {
     BM->addEntryPoint(ExecutionModelKernel, BF->getId());
   else if (F->getLinkage() != GlobalValue::InternalLinkage)
     BF->setLinkageType(transLinkageType(F));
-
-  // Translate OpenCL/SYCL buffer_location metadata if it's attached to the
-  // translated function declaration
-  MDNode *BufferLocation = nullptr;
-  if (BM->isAllowedToUseExtension(ExtensionID::SPV_INTEL_fpga_buffer_location))
-    BufferLocation = ((*F).getMetadata("kernel_arg_buffer_location"));
-
   auto Attrs = F->getAttributes();
 
   for (Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E;
@@ -559,15 +552,6 @@ SPIRVFunction *LLVMToSPIRV::transFunctionDecl(Function *F) {
       BA->addDecorate(DecorationMaxByteOffset,
                       Attrs.getAttribute(ArgNo + 1, Attribute::Dereferenceable)
                           .getDereferenceableBytes());
-    if (BufferLocation && I->getType()->isPointerTy()) {
-      // Order of integer numbers in MD node follows the order of function
-      // parameters on which we shall attach the appropriate decoration. Add
-      // decoration only if MD value is not negative.
-      BM->addCapability(CapabilityFPGABufferLocationINTEL);
-      int LocID = getMDOperandAsInt(BufferLocation, ArgNo);
-      if (LocID >= 0)
-        BA->addDecorate(DecorationBufferLocationINTEL, LocID);
-    }
   }
   if (Attrs.hasAttribute(AttributeList::ReturnIndex, Attribute::ZExt))
     BF->addDecorate(DecorationFuncParamAttr, FunctionParameterAttributeZext);

llvm-spirv/lib/SPIRV/libSPIRV/SPIRVDecorate.h

@@ -164,8 +164,6 @@ class SPIRVDecorate : public SPIRVDecorateGeneric {
       return getSet(ExtensionID::SPV_INTEL_function_pointers);
     case DecorationIOPipeStorageINTEL:
       return getSet(ExtensionID::SPV_INTEL_io_pipes);
-    case DecorationBufferLocationINTEL:
-      return getSet(ExtensionID::SPV_INTEL_fpga_buffer_location);
     default:
       return SPIRVExtSet();
     }
@@ -269,8 +267,6 @@ class SPIRVMemberDecorate : public SPIRVDecorateGeneric {
       return getSet(ExtensionID::SPV_INTEL_fpga_memory_accesses);
     case DecorationIOPipeStorageINTEL:
       return getSet(ExtensionID::SPV_INTEL_io_pipes);
-    case DecorationBufferLocationINTEL:
-      return getSet(ExtensionID::SPV_INTEL_fpga_buffer_location);
     default:
       return SPIRVExtSet();
     }

llvm-spirv/lib/SPIRV/libSPIRV/SPIRVEnum.h

@@ -402,8 +402,6 @@ template <> inline void SPIRVMap<Decoration, SPIRVCapVec>::init() {
   ADD_VEC_INIT(DecorationDontStaticallyCoalesceINTEL,
                {CapabilityFPGAMemoryAccessesINTEL});
   ADD_VEC_INIT(DecorationPrefetchINTEL, {CapabilityFPGAMemoryAccessesINTEL});
-  ADD_VEC_INIT(DecorationBufferLocationINTEL,
-               {CapabilityFPGABufferLocationINTEL});
 }
 
 template <> inline void SPIRVMap<BuiltIn, SPIRVCapVec>::init() {

llvm-spirv/lib/SPIRV/libSPIRV/SPIRVNameMapEnum.h

@@ -376,7 +376,6 @@ template <> inline void SPIRVMap<Decoration, std::string>::init() {
   add(DecorationGlobalVariableOffsetINTEL, "GlobalVariableOffsetINTEL");
   add(DecorationFuncParamIOKind, "FuncParamIOKind");
   add(DecorationSIMTCallINTEL, "SIMTCallINTEL");
-  add(DecorationBufferLocationINTEL, "BufferLocationINTEL");
 }
 SPIRV_DEF_NAMEMAP(Decoration, SPIRVDecorationNameMap)
 
@@ -561,7 +560,6 @@ template <> inline void SPIRVMap<Capability, std::string>::init() {
       "GroupNonUniformShuffleRelative");
   add(CapabilityGroupNonUniformClustered, "GroupNonUniformClustered");
   add(CapabilityUSMStorageClassesINTEL, "USMStorageClassesINTEL");
-  add(CapabilityFPGABufferLocationINTEL, "FPGABufferLocationINTEL");
 }
 SPIRV_DEF_NAMEMAP(Capability, SPIRVCapabilityNameMap)
 

llvm-spirv/lib/SPIRV/libSPIRV/spirv.hpp

@@ -508,7 +508,6 @@ enum Decoration {
   DecorationCacheSizeINTEL = 5900,
   DecorationDontStaticallyCoalesceINTEL = 5901,
   DecorationPrefetchINTEL = 5902,
-  DecorationBufferLocationINTEL = 5921,
   DecorationIOPipeStorageINTEL = 5944,
   DecorationMax = 0x7fffffff,
 };
@@ -963,7 +962,6 @@ enum Capability {
   CapabilityFPGARegINTEL = 5948,
   CapabilityKernelAttributesINTEL = 5892,
   CapabilityFPGAKernelAttributesINTEL = 5897,
-  CapabilityFPGABufferLocationINTEL = 5920,
   CapabilityUSMStorageClassesINTEL = 5935,
   CapabilityFPGAMemoryAccessesINTEL = 5898,
   CapabilityIOPipeINTEL = 5943,