llvm · KungFuDonkey · Oct 26, 2025
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
@@ -4999,6 +4999,12 @@ def HLSLWaveActiveAnyTrue : LangBuiltin<"HLSL_LANG"> {
   let Prototype = "bool(bool)";
 }
 
+def HLSLWaveActiveBitOr : LangBuiltin<"HLSL_LANG"> {
+  let Spellings = ["__builtin_hlsl_wave_active_bit_or"];
+  let Attributes = [NoThrow, Const];
+  let Prototype = "void (...)";
+}
+
 def HLSLWaveActiveCountBits : LangBuiltin<"HLSL_LANG"> {
   let Spellings = ["__builtin_hlsl_wave_active_count_bits"];
   let Attributes = [NoThrow, Const];

diff --git a/clang/lib/CodeGen/CGHLSLBuiltins.cpp b/clang/lib/CodeGen/CGHLSLBuiltins.cpp
@@ -690,6 +690,15 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
     return EmitRuntimeCall(
         Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID), {Op});
   }
+  case Builtin::BI__builtin_hlsl_wave_active_bit_or: {
+    Value *Op = EmitScalarExpr(E->getArg(0));
+    assert(Op->getType()->hasUnsignedIntegerRepresentation() &&
+           "Intrinsic WaveActiveBitOr operand must have a unsigned integer representation");
+
+    Intrinsic::ID ID = CGM.getHLSLRuntime().getWaveActiveBitOrIntrinsic();
+    return EmitRuntimeCall(
+        Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID), {Op});
+  }
   case Builtin::BI__builtin_hlsl_wave_active_count_bits: {
     Value *OpExpr = EmitScalarExpr(E->getArg(0));
     Intrinsic::ID ID = CGM.getHLSLRuntime().getWaveActiveCountBitsIntrinsic();

diff --git a/clang/lib/CodeGen/CGHLSLRuntime.h b/clang/lib/CodeGen/CGHLSLRuntime.h
@@ -113,6 +113,7 @@ class CGHLSLRuntime {
   GENERATE_HLSL_INTRINSIC_FUNCTION(Dot4AddU8Packed, dot4add_u8packed)
   GENERATE_HLSL_INTRINSIC_FUNCTION(WaveActiveAllTrue, wave_all)
   GENERATE_HLSL_INTRINSIC_FUNCTION(WaveActiveAnyTrue, wave_any)
+  GENERATE_HLSL_INTRINSIC_FUNCTION(WaveActiveBitOr, wave_reduce_or)
   GENERATE_HLSL_INTRINSIC_FUNCTION(WaveActiveCountBits, wave_active_countbits)
   GENERATE_HLSL_INTRINSIC_FUNCTION(WaveIsFirstLane, wave_is_first_lane)
   GENERATE_HLSL_INTRINSIC_FUNCTION(WaveGetLaneCount, wave_get_lane_count)

diff --git a/clang/lib/Headers/hlsl/hlsl_alias_intrinsics.h b/clang/lib/Headers/hlsl/hlsl_alias_intrinsics.h
@@ -2498,6 +2498,36 @@ __attribute__((convergent)) double3 WaveReadLaneAt(double3, uint32_t);
 _HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_read_lane_at)
 __attribute__((convergent)) double4 WaveReadLaneAt(double4, uint32_t);
 
+//===----------------------------------------------------------------------===//
+// WaveActiveBitOr builtins
+//===----------------------------------------------------------------------===//
+
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint WaveActiveBitOr(uint);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint2 WaveActiveBitOr(uint2);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint3 WaveActiveBitOr(uint3);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint4 WaveActiveBitOr(uint4);
+
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint64_t WaveActiveBitOr(uint64_t);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint64_t2 WaveActiveBitOr(uint64_t2);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint64_t3 WaveActiveBitOr(uint64_t3);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_bit_or)
+__attribute__((convergent)) uint64_t4 WaveActiveBitOr(uint64_t4);
+
 //===----------------------------------------------------------------------===//
 // WaveActiveMax builtins
 //===----------------------------------------------------------------------===//

diff --git a/clang/lib/Sema/SemaHLSL.cpp b/clang/lib/Sema/SemaHLSL.cpp
@@ -3211,6 +3211,29 @@ bool SemaHLSL::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
     TheCall->setType(ArgTyExpr);
     break;
   }
+  case Builtin::BI__builtin_hlsl_wave_active_bit_or: {
+    if (SemaRef.checkArgCount(TheCall, 1))
+      return true;
+
+    // Ensure input expr type is a scalar/vector and the same as the return type
+    if (CheckAnyScalarOrVector(&SemaRef, TheCall, 0))
+      return true;
+    if (CheckWaveActive(&SemaRef, TheCall))
+      return true;
+
+    // Ensure expression parameter type can be interpreted as a uint
+    ExprResult Expr = TheCall->getArg(0);
+    QualType ArgTyExpr = Expr.get()->getType();
+    if (!ArgTyExpr->isIntegerType()) {
+      SemaRef.Diag(TheCall->getArg(0)->getBeginLoc(),
+                   diag::err_typecheck_convert_incompatible)
+          << ArgTyExpr << SemaRef.Context.UnsignedIntTy << 1 << 0 << 0;
+      return true;
+    }
+
+    TheCall->setType(ArgTyExpr);
+    break;
+  }
   // Note these are llvm builtins that we want to catch invalid intrinsic
   // generation. Normal handling of these builitns will occur elsewhere.
   case Builtin::BI__builtin_elementwise_bitreverse: {

diff --git a/clang/test/CodeGenHLSL/builtins/WaveActiveBitOr.hlsl b/clang/test/CodeGenHLSL/builtins/WaveActiveBitOr.hlsl
@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -triple \
+// RUN:   dxil-pc-shadermodel6.3-compute %s -emit-llvm -disable-llvm-passes -o - | \
+// RUN:   FileCheck %s --check-prefixes=CHECK,CHECK-DXIL
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -triple \
+// RUN:   spirv-pc-vulkan-compute %s -emit-llvm -disable-llvm-passes -o - | \
+// RUN:   FileCheck %s --check-prefixes=CHECK,CHECK-SPIRV
+
+// Test basic lowering to runtime function call.
+
+// CHECK-LABEL: test_uint
+uint test_uint(uint expr) {
+  // CHECK-SPIRV:  %[[RET:.*]] = call spir_func [[TY:.*]] @llvm.spv.wave.reduce.or.i32([[TY]] %[[#]])
+  // CHECK-DXIL:  %[[RET:.*]] = call [[TY:.*]] @llvm.dx.wave.reduce.or.i32([[TY]] %[[#]])
+  // CHECK:  ret [[TY]] %[[RET]]
+  return WaveActiveBitOr(expr);
+}
+
+// CHECK-DXIL: declare [[TY]] @llvm.dx.wave.reduce.or.i32([[TY]]) #[[#attr:]]
+// CHECK-SPIRV: declare [[TY]] @llvm.spv.wave.reduce.or.i32([[TY]]) #[[#attr:]]
+
+// CHECK-LABEL: test_uint64_t
+uint64_t test_uint64_t(uint64_t expr) {
+  // CHECK-SPIRV:  %[[RET:.*]] = call spir_func [[TY:.*]] @llvm.spv.wave.reduce.or.i64([[TY]] %[[#]])
+  // CHECK-DXIL:  %[[RET:.*]] = call [[TY:.*]] @llvm.dx.wave.reduce.or.i64([[TY]] %[[#]])
+  // CHECK:  ret [[TY]] %[[RET]]
+  return WaveActiveBitOr(expr);
+}
+
+// CHECK-DXIL: declare [[TY]] @llvm.dx.wave.reduce.or.i64([[TY]]) #[[#attr:]]
+// CHECK-SPIRV: declare [[TY]] @llvm.spv.wave.reduce.or.i64([[TY]]) #[[#attr:]]
diff --git a/clang/test/SemaHLSL/BuiltIns/WaveActiveBitOr-errors.hlsl b/clang/test/SemaHLSL/BuiltIns/WaveActiveBitOr-errors.hlsl
@@ -0,0 +1,38 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -emit-llvm-only -disable-llvm-passes -verify
+
+uint test_too_few_arg() {
+  return __builtin_hlsl_wave_active_bit_or();
+  // expected-error@-1 {{too few arguments to function call, expected 1, have 0}}
+}
+
+uint2 test_too_many_arg(uint2 p0) {
+  return __builtin_hlsl_wave_active_bit_or(p0, p0);
+  // expected-error@-1 {{too many arguments to function call, expected 1, have 2}}
+}
+
+bool test_expr_bool_type_check(bool p0) {
+  return __builtin_hlsl_wave_active_bit_or(p0);
+  // expected-error@-1 {{invalid operand of type 'bool'}}
+}
+
+float test_expr_float_type_check(float p0) {
+  return __builtin_hlsl_wave_active_bit_or(p0);
+  // expected-error@-1 {{invalid operand of type 'float'}}
+}
+
+bool2 test_expr_bool_vec_type_check(bool2 p0) {
+  return __builtin_hlsl_wave_active_bit_or(p0);
+  // expected-error@-1 {{invalid operand of type 'bool2' (aka 'vector<bool, 2>')}}
+}
+
+float2 test_expr_float_type_check(float2 p0) {
+  return __builtin_hlsl_wave_active_bit_or(p0);
+  // expected-error@-1 {{invalid operand of type 'float2' (aka 'vector<float, 2>')}}
+}
+
+struct S { float f; };
+
+S test_expr_struct_type_check(S p0) {
+  return __builtin_hlsl_wave_active_bit_or(p0);
+  // expected-error@-1 {{invalid operand of type 'S' where a scalar or vector is required}}
+}
diff --git a/llvm/include/llvm/IR/IntrinsicsDirectX.td b/llvm/include/llvm/IR/IntrinsicsDirectX.td
@@ -151,6 +151,7 @@ def int_dx_wave_active_countbits : DefaultAttrsIntrinsic<[llvm_i32_ty], [llvm_i1
 def int_dx_wave_all : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_i1_ty], [IntrConvergent, IntrNoMem]>;
 def int_dx_wave_any : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_i1_ty], [IntrConvergent, IntrNoMem]>;
 def int_dx_wave_getlaneindex : DefaultAttrsIntrinsic<[llvm_i32_ty], [], [IntrConvergent, IntrNoMem]>;
+def int_dx_wave_reduce_or : DefaultAttrsIntrinsic<[llvm_anyint_ty], [llvm_anyint_ty], [IntrConvergent, IntrNoMem]>;
 def int_dx_wave_reduce_max : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
 def int_dx_wave_reduce_umax : DefaultAttrsIntrinsic<[llvm_anyint_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
 def int_dx_wave_reduce_sum : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;

diff --git a/llvm/include/llvm/IR/IntrinsicsSPIRV.td b/llvm/include/llvm/IR/IntrinsicsSPIRV.td
@@ -120,6 +120,7 @@ def int_spv_rsqrt : DefaultAttrsIntrinsic<[LLVMMatchType<0>], [llvm_anyfloat_ty]
   def int_spv_wave_active_countbits : DefaultAttrsIntrinsic<[llvm_i32_ty], [llvm_i1_ty], [IntrConvergent, IntrNoMem]>;
   def int_spv_wave_all : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_i1_ty], [IntrConvergent, IntrNoMem]>;
   def int_spv_wave_any : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_i1_ty], [IntrConvergent, IntrNoMem]>;
+  def int_spv_wave_reduce_or : DefaultAttrsIntrinsic<[llvm_anyint_ty], [llvm_anyint_ty], [IntrConvergent, IntrNoMem]>;
   def int_spv_wave_reduce_umax : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
   def int_spv_wave_reduce_max : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
   def int_spv_wave_reduce_sum : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
@@ -136,7 +137,7 @@ def int_spv_rsqrt : DefaultAttrsIntrinsic<[LLVMMatchType<0>], [llvm_anyfloat_ty]
   def int_spv_sclamp : DefaultAttrsIntrinsic<[llvm_anyint_ty], [LLVMMatchType<0>, LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
   def int_spv_nclamp : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>, LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
 
-  // Create resource handle given the binding information. Returns a 
+  // Create resource handle given the binding information. Returns a
   // type appropriate for the kind of resource given the set id, binding id,
   // array size of the binding, as well as an index and an indicator
   // whether that index may be non-uniform.

diff --git a/llvm/lib/Target/DirectX/DXIL.td b/llvm/lib/Target/DirectX/DXIL.td
@@ -316,6 +316,10 @@ defvar WaveOpKind_Product = 1;
 defvar WaveOpKind_Min = 2;
 defvar WaveOpKind_Max = 3;
 
+defvar WaveBitOpKind_And = 0;
+defvar WaveBitOpKind_Or = 1;
+defvar WaveBitOpKind_Xor = 2;
+
 defvar SignedOpKind_Signed = 0;
 defvar SignedOpKind_Unsigned = 1;
 
@@ -1069,6 +1073,24 @@ def WaveActiveOp : DXILOp<119, waveActiveOp> {
   let attributes = [Attributes<DXIL1_0, []>];
 }
 
+def WaveActiveBit : DXILOp<120, waveActiveBit> {
+  let Doc = "returns the result of the operation across waves";
+  let intrinsics = [
+    IntrinSelect<int_dx_wave_reduce_or,
+                 [
+                   IntrinArgIndex<0>, IntrinArgI8<WaveBitOpKind_Or>,
+                 ]>,
+  ];
+
+  let arguments = [OverloadTy, Int8Ty];
+  let result = OverloadTy;
+  let overloads = [
+    Overloads<DXIL1_0, [Int32Ty, Int64Ty]>
+  ];
+  let stages = [Stages<DXIL1_0, [all_stages]>];
+  let attributes = [Attributes<DXIL1_0, []>];
+}
+
 def WaveAllBitCount : DXILOp<135, waveAllOp> {
   let Doc = "returns the count of bits set to 1 across the wave";
   let intrinsics = [IntrinSelect<int_dx_wave_active_countbits>];

diff --git a/llvm/lib/Target/DirectX/DXILShaderFlags.cpp b/llvm/lib/Target/DirectX/DXILShaderFlags.cpp
@@ -90,6 +90,7 @@ static bool checkWaveOps(Intrinsic::ID IID) {
   case Intrinsic::dx_wave_readlane:
   case Intrinsic::dx_wave_active_countbits:
   // Wave Active Op Variants
+  case Intrinsic::dx_wave_reduce_or:
   case Intrinsic::dx_wave_reduce_sum:
   case Intrinsic::dx_wave_reduce_usum:
   case Intrinsic::dx_wave_reduce_max:

diff --git a/llvm/lib/Target/DirectX/DirectXTargetTransformInfo.cpp b/llvm/lib/Target/DirectX/DirectXTargetTransformInfo.cpp
@@ -54,6 +54,7 @@ bool DirectXTTIImpl::isTargetIntrinsicTriviallyScalarizable(
   case Intrinsic::dx_saturate:
   case Intrinsic::dx_splitdouble:
   case Intrinsic::dx_wave_readlane:
+  case Intrinsic::dx_wave_reduce_or:
   case Intrinsic::dx_wave_reduce_max:
   case Intrinsic::dx_wave_reduce_sum:
   case Intrinsic::dx_wave_reduce_umax:

diff --git a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
@@ -219,6 +219,9 @@ class SPIRVInstructionSelector : public InstructionSelector {
   bool selectDot4AddPackedExpansion(Register ResVReg, const SPIRVType *ResType,
                                     MachineInstr &I) const;
 
+  bool selectWaveReduceOr(Register ResVReg, const SPIRVType *ResType,
+                          MachineInstr &I) const;
+
   bool selectWaveReduceMax(Register ResVReg, const SPIRVType *ResType,
                            MachineInstr &I, bool IsUnsigned) const;
 
@@ -2427,6 +2430,32 @@ bool SPIRVInstructionSelector::selectWaveActiveCountBits(
   return Result;
 }
 
+bool SPIRVInstructionSelector::selectWaveReduceOr(
+    Register ResVReg, const SPIRVType *ResType, MachineInstr &I) const {
+
+  assert(I.getNumOperands() == 3);
+  assert(I.getOperand(2).isReg());
+  MachineBasicBlock &BB = *I.getParent();
+  Register InputRegister = I.getOperand(2).getReg();
+  SPIRVType *InputType = GR.getSPIRVTypeForVReg(InputRegister);
+
+  if (!InputType)
+    report_fatal_error("Input Type could not be determined.");
+
+  SPIRVType *IntTy = GR.getOrCreateSPIRVIntegerType(32, I, TII);
+
+  auto Opcode = SPIRV::OpGroupNonUniformBitwiseOr;
+
+  return BuildMI(BB, I, I.getDebugLoc(), TII.get(Opcode))
+      .addDef(ResVReg)
+      .addUse(GR.getSPIRVTypeID(ResType))
+      .addUse(GR.getOrCreateConstInt(SPIRV::Scope::Subgroup, I, IntTy, TII,
+                                     !STI.isShader()))
+      .addImm(SPIRV::GroupOperation::Reduce)
+      .addUse(I.getOperand(2).getReg())
+      .constrainAllUses(TII, TRI, RBI);
+}
+
 bool SPIRVInstructionSelector::selectWaveReduceMax(Register ResVReg,
                                                    const SPIRVType *ResType,
                                                    MachineInstr &I,
@@ -3427,6 +3456,8 @@ bool SPIRVInstructionSelector::selectIntrinsic(Register ResVReg,
     return selectWaveOpInst(ResVReg, ResType, I, SPIRV::OpGroupNonUniformAny);
   case Intrinsic::spv_wave_is_first_lane:
     return selectWaveOpInst(ResVReg, ResType, I, SPIRV::OpGroupNonUniformElect);
+  case Intrinsic::spv_wave_reduce_or:
+    return selectWaveReduceOr(ResVReg, ResType, I);
   case Intrinsic::spv_wave_reduce_umax:
     return selectWaveReduceMax(ResVReg, ResType, I, /*IsUnsigned*/ true);
   case Intrinsic::spv_wave_reduce_max:

diff --git a/llvm/test/CodeGen/DirectX/ShaderFlags/wave-ops.ll b/llvm/test/CodeGen/DirectX/ShaderFlags/wave-ops.ll
@@ -41,6 +41,13 @@ entry:
   ret i1 %ret
 }
 
+define noundef i32 @wave_bit_or(i32 %x) {
+entry:
+  ; CHECK: Function wave_bit_or : [[WAVE_FLAG]]
+  %ret = call i32 @llvm.dx.wave.reduce.or(i32 %x)
+  ret i32 %ret
+}
+
 define noundef i1 @wave_readlane(i1 %x, i32 %idx) {
 entry:
   ; CHECK: Function wave_readlane : [[WAVE_FLAG]]

diff --git a/llvm/test/CodeGen/DirectX/WaveActiveBitOr.ll b/llvm/test/CodeGen/DirectX/WaveActiveBitOr.ll
@@ -0,0 +1,19 @@
+; RUN: opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-compute %s | FileCheck %s
+
+define noundef i32 @wave_bitor_simple(i32 noundef %p1) {
+entry:
+; CHECK: call i32 @dx.op.waveActiveBit.i32(i32 120, i32 %p1, i8 1){{$}}
+  %ret = call i32 @llvm.dx.wave.reduce.or.i32(i32 %p1)
+  ret i32 %ret
+}
+
+declare i32 @llvm.dx.wave.reduce.or.i32(i32)
+
+define noundef i64 @wave_bitor_simple64(i64 noundef %p1) {
+entry:
+; CHECK: call i64 @dx.op.waveActiveBit.i64(i32 120, i64 %p1, i8 1){{$}}
+  %ret = call i64 @llvm.dx.wave.reduce.or.i64(i64 %p1)
+  ret i64 %ret
+}
+
+declare i64 @llvm.dx.wave.reduce.or.i64(i64)
diff --git a/llvm/test/CodeGen/SPIRV/hlsl-intrinsics/WaveActiveBitOr.ll b/llvm/test/CodeGen/SPIRV/hlsl-intrinsics/WaveActiveBitOr.ll
@@ -0,0 +1,30 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv-vulkan-unknown %s -o - | FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-vulkan-unknown %s -o - -filetype=obj | spirv-val %}
+
+; Test lowering to spir-v backend for various types and scalar/vector
+
+; CHECK-DAG:   %[[#uint:]] = OpTypeInt 32 0
+; CHECK-DAG:   %[[#uint64:]] = OpTypeInt 64 0
+; CHECK-DAG:   %[[#scope:]] = OpConstant %[[#uint]] 3
+
+; CHECK-LABEL: Begin function test_uint
+; CHECK:   %[[#iexpr:]] = OpFunctionParameter %[[#uint]]
+define i32 @test_uint(i32 %iexpr) {
+entry:
+; CHECK:   %[[#iret:]] = OpGroupNonUniformBitwiseOr %[[#uint]] %[[#scope]] Reduce %[[#iexpr]]
+  %0 = call i32 @llvm.spv.wave.reduce.or.i32(i32 %iexpr)
+  ret i32 %0
+}
+
+declare i32 @llvm.spv.wave.reduce.or.i32(i32)
+
+; CHECK-LABEL: Begin function test_uint64
+; CHECK:   %[[#iexpr64:]] = OpFunctionParameter %[[#uint64]]
+define i64 @test_uint64(i64 %iexpr64) {
+entry:
+; CHECK:   %[[#iret:]] = OpGroupNonUniformBitwiseOr %[[#uint64]] %[[#scope]] Reduce %[[#iexpr64]]
+  %0 = call i64 @llvm.spv.wave.reduce.or.i64(i64 %iexpr64)
+  ret i64 %0
+}
+
+declare i64 @llvm.spv.wave.reduce.or.i64(i64)