[llvm] 47cf5a1 - [SPIRV] Support for the extension SPV_ALTERA_blocking_pipes (#138675)

via llvm-commits llvm-commits at lists.llvm.org
Thu Nov 6 03:00:00 PST 2025 

Author: Aadesh Premkumar
Date: 2025-11-06T11:59:54+01:00
New Revision: 47cf5a1b828d993d0a21f44334a31a0f7337f8a8

URL: https://github.com/llvm/llvm-project/commit/47cf5a1b828d993d0a21f44334a31a0f7337f8a8
DIFF: https://github.com/llvm/llvm-project/commit/47cf5a1b828d993d0a21f44334a31a0f7337f8a8.diff

LOG: [SPIRV] Support for the extension SPV_ALTERA_blocking_pipes (#138675)

--Added support for the extension SPV_ALTERA_blocking_pipes
--Added test files for the extension SPV_ALTERA_blocking_pipes

Added: 
    llvm/test/CodeGen/SPIRV/extensions/SPV_ALTERA_blocking_pipes/PipeBlocking.ll

Modified: 
    llvm/docs/SPIRVUsage.rst
    llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
    llvm/lib/Target/SPIRV/SPIRVBuiltins.td
    llvm/lib/Target/SPIRV/SPIRVCommandLine.cpp
    llvm/lib/Target/SPIRV/SPIRVInstrInfo.td
    llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
    llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td
    mlir/include/mlir/Dialect/SPIRV/IR/SPIRVBase.td

Removed: 
    


################################################################################
diff  --git a/llvm/docs/SPIRVUsage.rst b/llvm/docs/SPIRVUsage.rst
index 749961356d23e..9ecd39025e781 100644
--- a/llvm/docs/SPIRVUsage.rst
+++ b/llvm/docs/SPIRVUsage.rst
@@ -241,6 +241,8 @@ Below is a list of supported SPIR-V extensions, sorted alphabetically by their e
      - Adds predicated load and store instructions that conditionally read from or write to memory based on a boolean predicate.
    * - ``SPV_KHR_maximal_reconvergence``
      - Adds execution mode and capability to enable maximal reconvergence.
+   * - ``SPV_ALTERA_blocking_pipes``
+     - Adds new pipe read and write functions that have blocking semantics instead of the non-blocking semantics of the existing pipe read/write functions.
 
 SPIR-V representation in LLVM IR
 ================================

diff  --git a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
index 56a38bb49b7e7..b2cbdb2ad7375 100644
--- a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
@@ -2390,6 +2390,15 @@ static bool generateBindlessImageINTELInst(const SPIRV::IncomingCall *Call,
   return buildBindlessImageINTELInst(Call, Opcode, MIRBuilder, GR);
 }
 
+static bool generateBlockingPipesInst(const SPIRV::IncomingCall *Call,
+                                      MachineIRBuilder &MIRBuilder,
+                                      SPIRVGlobalRegistry *GR) {
+  const SPIRV::DemangledBuiltin *Builtin = Call->Builtin;
+  unsigned Opcode =
+      SPIRV::lookupNativeBuiltin(Builtin->Name, Builtin->Set)->Opcode;
+  return buildOpFromWrapper(MIRBuilder, Opcode, Call, Register(0));
+}
+
 static bool
 generateTernaryBitwiseFunctionINTELInst(const SPIRV::IncomingCall *Call,
                                         MachineIRBuilder &MIRBuilder,
@@ -3050,6 +3059,8 @@ std::optional<bool> lowerBuiltin(const StringRef DemangledCall,
     return generatePipeInst(Call.get(), MIRBuilder, GR);
   case SPIRV::PredicatedLoadStore:
     return generatePredicatedLoadStoreInst(Call.get(), MIRBuilder, GR);
+  case SPIRV::BlockingPipes:
+    return generateBlockingPipesInst(Call.get(), MIRBuilder, GR);
   }
   return false;
 }

diff  --git a/llvm/lib/Target/SPIRV/SPIRVBuiltins.td b/llvm/lib/Target/SPIRV/SPIRVBuiltins.td
index c259ccee359b4..492a98e1995fe 100644
--- a/llvm/lib/Target/SPIRV/SPIRVBuiltins.td
+++ b/llvm/lib/Target/SPIRV/SPIRVBuiltins.td
@@ -71,6 +71,7 @@ def TernaryBitwiseINTEL : BuiltinGroup;
 def Block2DLoadStore : BuiltinGroup;
 def Pipe : BuiltinGroup;
 def PredicatedLoadStore : BuiltinGroup;
+def BlockingPipes : BuiltinGroup;
 
 //===----------------------------------------------------------------------===//
 // Class defining a demangled builtin record. The information in the record
@@ -1174,6 +1175,10 @@ defm : DemangledNativeBuiltin<"clock_read_sub_group", OpenCL_std, KernelClock, 0
 defm : DemangledNativeBuiltin<"clock_read_hilo_device", OpenCL_std, KernelClock, 0, 0, OpReadClockKHR>;
 defm : DemangledNativeBuiltin<"clock_read_hilo_work_group", OpenCL_std, KernelClock, 0, 0, OpReadClockKHR>;
 defm : DemangledNativeBuiltin<"clock_read_hilo_sub_group", OpenCL_std, KernelClock, 0, 0, OpReadClockKHR>;
+
+//SPV_ALTERA_blocking_pipes
+defm : DemangledNativeBuiltin<"__spirv_WritePipeBlockingINTEL", OpenCL_std, BlockingPipes, 0, 0, OpWritePipeBlockingALTERA>;
+defm : DemangledNativeBuiltin<"__spirv_ReadPipeBlockingINTEL", OpenCL_std, BlockingPipes, 0, 0, OpReadPipeBlockingALTERA>;
 defm : DemangledNativeBuiltin<"__spirv_ReadClockKHR", OpenCL_std, KernelClock, 1, 1, OpReadClockKHR>;
 
 //===----------------------------------------------------------------------===//

diff  --git a/llvm/lib/Target/SPIRV/SPIRVCommandLine.cpp b/llvm/lib/Target/SPIRV/SPIRVCommandLine.cpp
index 43b2869cecdf7..f681b0d9fb433 100644
--- a/llvm/lib/Target/SPIRV/SPIRVCommandLine.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVCommandLine.cpp
@@ -159,7 +159,9 @@ static const std::map<std::string, SPIRV::Extension::Extension, std::less<>>
         {"SPV_KHR_maximal_reconvergence",
          SPIRV::Extension::Extension::SPV_KHR_maximal_reconvergence},
         {"SPV_INTEL_kernel_attributes",
-         SPIRV::Extension::Extension::SPV_INTEL_kernel_attributes}};
+         SPIRV::Extension::Extension::SPV_INTEL_kernel_attributes},
+        {"SPV_ALTERA_blocking_pipes",
+         SPIRV::Extension::Extension::SPV_ALTERA_blocking_pipes}};
 
 bool SPIRVExtensionsParser::parse(cl::Option &O, StringRef ArgName,
                                   StringRef ArgValue,

diff  --git a/llvm/lib/Target/SPIRV/SPIRVInstrInfo.td b/llvm/lib/Target/SPIRV/SPIRVInstrInfo.td
index a61351eba03f8..03bd61bdf2cf6 100644
--- a/llvm/lib/Target/SPIRV/SPIRVInstrInfo.td
+++ b/llvm/lib/Target/SPIRV/SPIRVInstrInfo.td
@@ -993,3 +993,9 @@ def OpPredicatedLoadINTEL: Op<6528, (outs ID:$res), (ins TYPE:$resType, ID:$ptr,
                   "$res = OpPredicatedLoadINTEL $resType $ptr $predicate $default_value">;
 def OpPredicatedStoreINTEL: Op<6529, (outs), (ins ID:$ptr, ID:$object, ID:$predicate, variable_ops),
                   "OpPredicatedStoreINTEL $ptr $object $predicate">;
+
+//SPV_ALTERA_blocking_pipes
+def OpReadPipeBlockingALTERA :Op<5946, (outs), (ins ID:$pipe, ID:$pointer, ID:$packetSize, ID:$packetAlignment),
+                   "OpReadPipeBlockingALTERA $pipe $pointer $packetSize $packetAlignment">;
+def OpWritePipeBlockingALTERA :Op<5946, (outs), (ins ID:$pipe, ID:$pointer, ID:$packetSize, ID:$packetAlignment),
+                   "OpWritePipeBlockingALTERA $pipe $pointer $packetSize $packetAlignment">;

diff  --git a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
index e5ac76c405841..af76016861761 100644
--- a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
@@ -1885,6 +1885,13 @@ void addInstrRequirements(const MachineInstr &MI,
     Reqs.addCapability(
         SPIRV::Capability::CooperativeMatrixCheckedInstructionsINTEL);
     break;
+  case SPIRV::OpReadPipeBlockingALTERA:
+  case SPIRV::OpWritePipeBlockingALTERA:
+    if (ST.canUseExtension(SPIRV::Extension::SPV_ALTERA_blocking_pipes)) {
+      Reqs.addExtension(SPIRV::Extension::SPV_ALTERA_blocking_pipes);
+      Reqs.addCapability(SPIRV::Capability::BlockingPipesALTERA);
+    }
+    break;
   case SPIRV::OpCooperativeMatrixGetElementCoordINTEL:
     if (!ST.canUseExtension(SPIRV::Extension::SPV_INTEL_joint_matrix))
       report_fatal_error("OpCooperativeMatrixGetElementCoordINTEL requires the "

diff  --git a/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td b/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td
index 1b4b29bbb160a..65a888529bb58 100644
--- a/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td
+++ b/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td
@@ -309,7 +309,7 @@ defm SPV_KHR_shader_clock : ExtensionOperand<54, [EnvVulkan, EnvOpenCL]>;
 defm SPV_INTEL_unstructured_loop_controls : ExtensionOperand<55, [EnvOpenCL]>;
 defm SPV_EXT_demote_to_helper_invocation : ExtensionOperand<56, [EnvVulkan]>;
 defm SPV_INTEL_fpga_reg : ExtensionOperand<57, [EnvOpenCL]>;
-defm SPV_INTEL_blocking_pipes : ExtensionOperand<58, [EnvOpenCL]>;
+defm SPV_ALTERA_blocking_pipes : ExtensionOperand<58, [EnvOpenCL]>;
 defm SPV_GOOGLE_user_type : ExtensionOperand<59, [EnvVulkan]>;
 defm SPV_KHR_physical_storage_buffer : ExtensionOperand<60, [EnvVulkan]>;
 defm SPV_INTEL_kernel_attributes : ExtensionOperand<61, [EnvOpenCL]>;
@@ -611,6 +611,7 @@ defm TensorFloat32RoundingINTEL : CapabilityOperand<6425, 0, 0, [SPV_INTEL_tenso
 defm BFloat16TypeKHR : CapabilityOperand<5116, 0, 0, [SPV_KHR_bfloat16], []>;
 defm BFloat16DotProductKHR : CapabilityOperand<5117, 0, 0, [SPV_KHR_bfloat16], [BFloat16TypeKHR]>;
 defm BFloat16CooperativeMatrixKHR : CapabilityOperand<5118, 0, 0, [SPV_KHR_bfloat16], [BFloat16TypeKHR, CooperativeMatrixKHR]>;
+defm BlockingPipesALTERA : CapabilityOperand<5945, 0, 0, [SPV_ALTERA_blocking_pipes], []>;
 
 //===----------------------------------------------------------------------===//
 // Multiclass used to define SourceLanguage enum values and at the same time

diff  --git a/llvm/test/CodeGen/SPIRV/extensions/SPV_ALTERA_blocking_pipes/PipeBlocking.ll b/llvm/test/CodeGen/SPIRV/extensions/SPV_ALTERA_blocking_pipes/PipeBlocking.ll
new file mode 100644
index 0000000000000..f6b61153cf19e
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/extensions/SPV_ALTERA_blocking_pipes/PipeBlocking.ll
@@ -0,0 +1,98 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv32-unknown-unknown --spirv-ext=+SPV_ALTERA_blocking_pipes %s -o - | FileCheck %s --check-prefixes=CHECK-SPIRV
+; TODO: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unknown-unknown --spirv-ext=+SPV_ALTERA_blocking_pipes %s -o - -filetype=obj | spirv-val %}
+
+%opencl.pipe_ro_t = type opaque
+%opencl.pipe_wo_t = type opaque
+
+; CHECK-SPIRV: OpCapability BlockingPipesALTERA
+; CHECK-SPIRV: OpExtension "SPV_ALTERA_blocking_pipes"
+; CHECK-SPIRV: %[[PipeRTy:[0-9]+]] = OpTypePipe ReadOnly
+; CHECK-SPIRV: %[[PipeWTy:[0-9]+]] = OpTypePipe WriteOnly
+; CHECK-SPIRV: %[[PipeR1:[0-9]+]] = OpLoad %[[PipeRTy]] %[[#]] Aligned 8
+; CHECK-SPIRV: OpReadPipeBlockingALTERA %[[PipeR1]] %[[#]] %[[#]] %[[#]]
+; CHECK-SPIRV: %[[PipeR2:[0-9]+]] = OpLoad %[[PipeRTy]] %[[#]] Aligned 8
+; CHECK-SPIRV: OpReadPipeBlockingALTERA %[[PipeR2]] %[[#]]  %[[#]] %[[#]]
+; CHECK-SPIRV: %[[PipeW1:[0-9]+]] = OpLoad %[[PipeWTy]] %[[#]] Aligned 8
+; CHECK-SPIRV: OpWritePipeBlockingALTERA %[[PipeW1]] %[[#]]  %[[#]] %[[#]]
+; CHECK-SPIRV: %[[PipeW2:[0-9]+]] = OpLoad %[[PipeWTy]] %[[#]] Aligned 8
+; CHECK-SPIRV: OpWritePipeBlockingALTERA %[[PipeW2]] %[[#]] %[[#]] %[[#]]
+
+define spir_func void @foo(target("spirv.Pipe", 0) %p, ptr addrspace(1) %ptr) {
+entry:
+  %p.addr = alloca target("spirv.Pipe", 0), align 8
+  %ptr.addr = alloca ptr addrspace(1), align 8
+  store target("spirv.Pipe", 0) %p, target("spirv.Pipe", 0)* %p.addr, align 8
+  store ptr addrspace(1) %ptr, ptr %ptr.addr, align 8
+  %0 = load target("spirv.Pipe", 0), target("spirv.Pipe", 0)* %p.addr, align 8
+  %1 = load ptr addrspace(1), ptr %ptr.addr, align 8
+  %2 = addrspacecast ptr addrspace(1) %1 to ptr addrspace(4)
+  call spir_func void @_Z29__spirv_ReadPipeBlockingINTELIiEv8ocl_pipePiii(target("spirv.Pipe", 0) %0, ptr addrspace(4) %2, i32 4, i32 4)
+  ret void
+}
+
+declare dso_local spir_func void @_Z29__spirv_ReadPipeBlockingINTELIiEv8ocl_pipePiii(target("spirv.Pipe", 0), ptr addrspace(4), i32, i32)
+
+define spir_func void @bar(target("spirv.Pipe", 0) %p, ptr addrspace(1) %ptr) {
+entry:
+  %p.addr = alloca target("spirv.Pipe", 0), align 8
+  %ptr.addr = alloca ptr addrspace(1), align 8
+  store target("spirv.Pipe", 0) %p, target("spirv.Pipe", 0)* %p.addr, align 8
+  store ptr addrspace(1) %ptr, ptr %ptr.addr, align 8
+  %0 = load target("spirv.Pipe", 0), target("spirv.Pipe", 0)* %p.addr, align 8
+  %1 = load ptr addrspace(1), ptr %ptr.addr, align 8
+  %2 = addrspacecast ptr addrspace(1) %1 to ptr addrspace(4)
+  call spir_func void @_Z29__spirv_ReadPipeBlockingINTELIiEv8ocl_pipePvii(target("spirv.Pipe", 0) %0, ptr addrspace(4) %2, i32 4, i32 4)
+  ret void
+}
+
+declare dso_local spir_func void @_Z29__spirv_ReadPipeBlockingINTELIiEv8ocl_pipePvii(target("spirv.Pipe", 0), ptr addrspace(4), i32, i32)
+
+define spir_func void @boo(target("spirv.Pipe", 1) %p, ptr addrspace(1) %ptr) {
+entry:
+  %p.addr = alloca target("spirv.Pipe", 1), align 8
+  %ptr.addr = alloca ptr addrspace(1), align 8
+  store target("spirv.Pipe", 1) %p, target("spirv.Pipe", 1)* %p.addr, align 8
+  store ptr addrspace(1) %ptr, ptr %ptr.addr, align 8
+  %0 = load target("spirv.Pipe", 1), target("spirv.Pipe", 1)* %p.addr, align 8
+  %1 = load ptr addrspace(1), ptr %ptr.addr, align 8
+  %2 = addrspacecast ptr addrspace(1) %1 to ptr addrspace(4)
+  call spir_func void @_Z30__spirv_WritePipeBlockingINTELIKiEv8ocl_pipePiii(target("spirv.Pipe", 1) %0, ptr addrspace(4) %2, i32 4, i32 4)
+  ret void
+}
+
+declare dso_local spir_func void @_Z30__spirv_WritePipeBlockingINTELIKiEv8ocl_pipePiii(target("spirv.Pipe", 1), ptr addrspace(4), i32, i32)
+
+define spir_func void @baz(target("spirv.Pipe", 1) %p, ptr addrspace(1) %ptr) {
+entry:
+  %p.addr = alloca target("spirv.Pipe", 1), align 8
+  %ptr.addr = alloca ptr addrspace(1), align 8
+  store target("spirv.Pipe", 1) %p, target("spirv.Pipe", 1)* %p.addr, align 8
+  store ptr addrspace(1) %ptr, ptr %ptr.addr, align 8
+  %0 = load target("spirv.Pipe", 1), target("spirv.Pipe", 1)* %p.addr, align 8
+  %1 = load ptr addrspace(1), ptr %ptr.addr, align 8
+  %2 = addrspacecast ptr addrspace(1) %1 to ptr addrspace(4)
+  call spir_func void @_Z30__spirv_WritePipeBlockingINTELIKiEv8ocl_pipePvii(target("spirv.Pipe", 1) %0, ptr addrspace(4) %2, i32 4, i32 4)
+  ret void
+}
+
+declare dso_local spir_func void @_Z30__spirv_WritePipeBlockingINTELIKiEv8ocl_pipePvii(target("spirv.Pipe", 1), ptr addrspace(4), i32, i32)
+
+; CHECK-LLVM: declare spir_func void @__read_pipe_2_bl(ptr addrspace(1), ptr addrspace(4), i32, i32)
+; CHECK-LLVM: declare spir_func void @__write_pipe_2_bl(ptr addrspace(1), ptr addrspace(4), i32, i32)
+
+define linkonce_odr dso_local spir_func void @WritePipeBLockingi9Pointer(ptr addrspace(4) align 2 dereferenceable(2) %_Data) {
+entry:
+  %_Data.addr = alloca ptr addrspace(4), align 8
+  %_WPipe = alloca target("spirv.Pipe", 1), align 8
+  %_Data.addr.ascast = addrspacecast ptr %_Data.addr to ptr addrspace(4)
+  %_WPipe.ascast = addrspacecast target("spirv.Pipe", 1)* %_WPipe to target("spirv.Pipe", 1) addrspace(4)*
+  store ptr addrspace(4) %_Data, ptr addrspace(4) %_Data.addr.ascast, align 8
+  %0 = bitcast target("spirv.Pipe", 1)* %_WPipe to ptr
+  %1 = load target("spirv.Pipe", 1), target("spirv.Pipe", 1) addrspace(4)* %_WPipe.ascast, align 8
+  %2 = load ptr addrspace(4), ptr addrspace(4) %_Data.addr.ascast, align 8
+  call spir_func void @_Z30__spirv_WritePipeBlockingINTELIDU9_Ev8ocl_pipePKT_ii(target("spirv.Pipe", 1) %1, ptr addrspace(4) %2, i32 2, i32 2)
+  ret void
+}
+
+declare dso_local spir_func void @_Z30__spirv_WritePipeBlockingINTELIDU9_Ev8ocl_pipePKT_ii(target("spirv.Pipe", 1), ptr addrspace(4), i32, i32)
+ 
\ No newline at end of file

diff  --git a/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVBase.td b/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVBase.td
index 0e42d08cdb1fc..b628f1a3f7b20 100644
--- a/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVBase.td
+++ b/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVBase.td
@@ -395,7 +395,7 @@ def SPV_INTEL_fpga_buffer_location               : I32EnumAttrCase<"SPV_INTEL_fp
 def SPV_INTEL_arbitrary_precision_fixed_point    : I32EnumAttrCase<"SPV_INTEL_arbitrary_precision_fixed_point", 4019>;
 def SPV_INTEL_usm_storage_classes                : I32EnumAttrCase<"SPV_INTEL_usm_storage_classes", 4020>;
 def SPV_INTEL_io_pipes                           : I32EnumAttrCase<"SPV_INTEL_io_pipes", 4021>;
-def SPV_INTEL_blocking_pipes                     : I32EnumAttrCase<"SPV_INTEL_blocking_pipes", 4022>;
+def SPV_ALTERA_blocking_pipes                     : I32EnumAttrCase<"SPV_ALTERA_blocking_pipes", 4022>;
 def SPV_INTEL_fpga_reg                           : I32EnumAttrCase<"SPV_INTEL_fpga_reg", 4023>;
 def SPV_INTEL_long_constant_composite            : I32EnumAttrCase<"SPV_INTEL_long_constant_composite", 4024>;
 def SPV_INTEL_optnone                            : I32EnumAttrCase<"SPV_INTEL_optnone", 4025>;
@@ -465,7 +465,7 @@ def SPIRV_ExtensionAttr :
       SPV_INTEL_kernel_attributes, SPV_INTEL_fpga_memory_accesses,
       SPV_INTEL_fpga_cluster_attributes, SPV_INTEL_loop_fuse,
       SPV_INTEL_fpga_buffer_location, SPV_INTEL_arbitrary_precision_fixed_point,
-      SPV_INTEL_usm_storage_classes, SPV_INTEL_io_pipes, SPV_INTEL_blocking_pipes,
+      SPV_INTEL_usm_storage_classes, SPV_INTEL_io_pipes, SPV_ALTERA_blocking_pipes,
       SPV_INTEL_fpga_reg, SPV_INTEL_long_constant_composite, SPV_INTEL_optnone,
       SPV_INTEL_debug_module, SPV_INTEL_fp_fast_math_mode,
       SPV_INTEL_memory_access_aliasing, SPV_INTEL_split_barrier,
@@ -807,9 +807,9 @@ def SPIRV_C_IOPipesINTEL                                : I32EnumAttrCase<"IOPip
     Extension<[SPV_INTEL_io_pipes]>
   ];
 }
-def SPIRV_C_BlockingPipesINTEL                          : I32EnumAttrCase<"BlockingPipesINTEL", 5945> {
+def SPIRV_C_BlockingPipesALTERA                          : I32EnumAttrCase<"BlockingPipesALTERA", 5945> {
   list<Availability> availability = [
-    Extension<[SPV_INTEL_blocking_pipes]>
+    Extension<[SPV_ALTERA_blocking_pipes]>
   ];
 }
 def SPIRV_C_FPGARegINTEL                                : I32EnumAttrCase<"FPGARegINTEL", 5948> {
@@ -1519,7 +1519,7 @@ def SPIRV_CapabilityAttr :
       SPIRV_C_FPGAMemoryAccessesINTEL, SPIRV_C_FPGAClusterAttributesINTEL,
       SPIRV_C_LoopFuseINTEL, SPIRV_C_MemoryAccessAliasingINTEL,
       SPIRV_C_FPGABufferLocationINTEL, SPIRV_C_ArbitraryPrecisionFixedPointINTEL,
-      SPIRV_C_USMStorageClassesINTEL, SPIRV_C_IOPipesINTEL, SPIRV_C_BlockingPipesINTEL,
+      SPIRV_C_USMStorageClassesINTEL, SPIRV_C_IOPipesINTEL, SPIRV_C_BlockingPipesALTERA,
       SPIRV_C_FPGARegINTEL, SPIRV_C_DotProductInputAll,
       SPIRV_C_DotProductInput4x8BitPacked, SPIRV_C_DotProduct, SPIRV_C_RayCullMaskKHR,
       SPIRV_C_CooperativeMatrixKHR, SPIRV_C_ReplicatedCompositesEXT,

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