[clang] [llvm] [HLSL][SPIRV] Implement `WaveActiveSum` intrinsic (PR #112400)
via cfe-commits
cfe-commits at lists.llvm.org
Fri Oct 18 14:09:59 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-x86
Author: Finn Plummer (inbelic)
<details>
<summary>Changes</summary>
```
- add clang builtin to Builtins.td
- link builtin in hlsl_intrinsics
- add codegen for spirv intrinsic and two directx intrinsics to retain
signedness information of the operands in CGBuiltin.cpp
- add semantic analysis in SemaHLSL.cpp
- add lowering of spirv intrinsic to spirv backend in
SPIRVInstructionSelector.cpp
- add test cases to illustrate passes
Note that this defines the dx intrinsics but does not implement the
DirectX lowering to DXIL. This will implemented in a second pr when
the dependent pr merges.
```
Part 1 of #<!-- -->70106
---
Patch is 21.89 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/112400.diff
11 Files Affected:
- (modified) clang/include/clang/Basic/Builtins.td (+6)
- (modified) clang/include/clang/Basic/DiagnosticSemaKinds.td (+3)
- (modified) clang/lib/CodeGen/CGBuiltin.cpp (+34)
- (modified) clang/lib/Headers/hlsl/hlsl_intrinsics.h (+99)
- (modified) clang/lib/Sema/SemaHLSL.cpp (+31)
- (added) clang/test/CodeGenHLSL/builtins/WaveActiveSum.hlsl (+48)
- (added) clang/test/SemaHLSL/BuiltIns/WaveActiveSum-errors.hlsl (+28)
- (modified) llvm/include/llvm/IR/IntrinsicsDirectX.td (+2)
- (modified) llvm/include/llvm/IR/IntrinsicsSPIRV.td (+1)
- (modified) llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp (+33)
- (added) llvm/test/CodeGen/SPIRV/hlsl-intrinsics/WaveActiveSum.ll (+41)
``````````diff
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
index 382fb6b7a3c031..7205f10b01c2b9 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -4749,6 +4749,12 @@ def HLSLWaveActiveCountBits : LangBuiltin<"HLSL_LANG"> {
let Prototype = "unsigned int(bool)";
}
+def HLSLWaveActiveSum : LangBuiltin<"HLSL_LANG"> {
+ let Spellings = ["__builtin_hlsl_wave_active_sum"];
+ let Attributes = [NoThrow, Const];
+ let Prototype = "void (...)";
+}
+
def HLSLWaveGetLaneIndex : LangBuiltin<"HLSL_LANG"> {
let Spellings = ["__builtin_hlsl_wave_get_lane_index"];
let Attributes = [NoThrow, Const];
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index c458a62d9be48c..95093723c2f495 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -9232,6 +9232,9 @@ def err_typecheck_expect_scalar_or_vector : Error<
"a vector of such type is required">;
def err_typecheck_expect_any_scalar_or_vector : Error<
"invalid operand of type %0 where a scalar or vector is required">;
+def err_typecheck_expect_scalar_or_vector_not_type : Error<
+ "invalid operand of type %0 where %1 or "
+ "a vector of such type is not allowed">;
def err_typecheck_expect_flt_or_vector : Error<
"invalid operand of type %0 where floating, complex or "
"a vector of such types is required">;
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 12f99d9f1178a9..46646492b30d31 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -18638,6 +18638,23 @@ static Intrinsic::ID getDotProductIntrinsic(CGHLSLRuntime &RT, QualType QT) {
return RT.getUDotIntrinsic();
}
+// Return wave active sum that corresponds to the QT scalar type
+static Intrinsic::ID getWaveActiveSumIntrinsic(llvm::Triple::ArchType Arch,
+ CGHLSLRuntime &RT, QualType QT) {
+ switch (Arch) {
+ case llvm::Triple::spirv:
+ return llvm::Intrinsic::spv_wave_active_sum;
+ case llvm::Triple::dxil: {
+ if (QT->isUnsignedIntegerType())
+ return llvm::Intrinsic::dx_wave_active_usum;
+ return llvm::Intrinsic::dx_wave_active_sum;
+ }
+ default:
+ llvm_unreachable("Intrinsic WaveActiveSum"
+ " not supported by target architecture");
+ }
+}
+
Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
const CallExpr *E,
ReturnValueSlot ReturnValue) {
@@ -18883,6 +18900,23 @@ case Builtin::BI__builtin_hlsl_elementwise_isinf: {
/*ReturnType=*/Op0->getType(), CGM.getHLSLRuntime().getStepIntrinsic(),
ArrayRef<Value *>{Op0, Op1}, nullptr, "hlsl.step");
}
+ case Builtin::BI__builtin_hlsl_wave_active_sum: {
+ // Due to the use of variadic arguments, explicitly retreive argument
+ Value *OpExpr = EmitScalarExpr(E->getArg(0));
+ llvm::FunctionType *FT = llvm::FunctionType::get(
+ OpExpr->getType(), ArrayRef{OpExpr->getType()}, false);
+ Intrinsic::ID IID = getWaveActiveSumIntrinsic(
+ getTarget().getTriple().getArch(), CGM.getHLSLRuntime(),
+ E->getArg(0)->getType());
+
+ // Get overloaded name
+ std::string Name =
+ Intrinsic::getName(IID, ArrayRef{OpExpr->getType()}, &CGM.getModule());
+ return EmitRuntimeCall(CGM.CreateRuntimeFunction(FT, Name, {},
+ /*Local=*/false,
+ /*AssumeConvergent=*/true),
+ ArrayRef{OpExpr}, "hlsl.wave.active.sum");
+ }
case Builtin::BI__builtin_hlsl_wave_get_lane_index: {
// We don't define a SPIR-V intrinsic, instead it is a SPIR-V built-in
// defined in SPIRVBuiltins.td. So instead we manually get the matching name
diff --git a/clang/lib/Headers/hlsl/hlsl_intrinsics.h b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
index 30dce60b3ff702..6b2843ca40c2e5 100644
--- a/clang/lib/Headers/hlsl/hlsl_intrinsics.h
+++ b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
@@ -2177,6 +2177,105 @@ __attribute__((convergent)) double3 WaveReadLaneAt(double3, int32_t);
_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_read_lane_at)
__attribute__((convergent)) double4 WaveReadLaneAt(double4, int32_t);
+//===----------------------------------------------------------------------===//
+// WaveActiveSum builtins
+//===----------------------------------------------------------------------===//
+
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) half WaveActiveSum(half);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) half2 WaveActiveSum(half2);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) half3 WaveActiveSum(half3);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) half4 WaveActiveSum(half4);
+
+#ifdef __HLSL_ENABLE_16_BIT
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int16_t WaveActiveSum(int16_t);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int16_t2 WaveActiveSum(int16_t2);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int16_t3 WaveActiveSum(int16_t3);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int16_t4 WaveActiveSum(int16_t4);
+
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint16_t WaveActiveSum(uint16_t);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint16_t2 WaveActiveSum(uint16_t2);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint16_t3 WaveActiveSum(uint16_t3);
+_HLSL_AVAILABILITY(shadermodel, 6.0)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint16_t4 WaveActiveSum(uint16_t4);
+#endif
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int WaveActiveSum(int);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int2 WaveActiveSum(int2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int3 WaveActiveSum(int3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int4 WaveActiveSum(int4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint WaveActiveSum(uint);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint2 WaveActiveSum(uint2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint3 WaveActiveSum(uint3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint4 WaveActiveSum(uint4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int64_t WaveActiveSum(int64_t);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int64_t2 WaveActiveSum(int64_t2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int64_t3 WaveActiveSum(int64_t3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) int64_t4 WaveActiveSum(int64_t4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint64_t WaveActiveSum(uint64_t);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint64_t2 WaveActiveSum(uint64_t2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint64_t3 WaveActiveSum(uint64_t3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) uint64_t4 WaveActiveSum(uint64_t4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) float WaveActiveSum(float);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) float2 WaveActiveSum(float2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) float3 WaveActiveSum(float3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) float4 WaveActiveSum(float4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) double WaveActiveSum(double);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) double2 WaveActiveSum(double2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) double3 WaveActiveSum(double3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_wave_active_sum)
+__attribute((convergent)) double4 WaveActiveSum(double4);
+
//===----------------------------------------------------------------------===//
// sign builtins
//===----------------------------------------------------------------------===//
diff --git a/clang/lib/Sema/SemaHLSL.cpp b/clang/lib/Sema/SemaHLSL.cpp
index 698fdbed0484e5..7ad4ccc551c7af 100644
--- a/clang/lib/Sema/SemaHLSL.cpp
+++ b/clang/lib/Sema/SemaHLSL.cpp
@@ -1767,6 +1767,23 @@ static bool CheckAnyScalarOrVector(Sema *S, CallExpr *TheCall,
return false;
}
+static bool CheckNotScalarType(Sema *S, CallExpr *TheCall, QualType Scalar,
+ unsigned ArgIndex) {
+ assert(TheCall->getNumArgs() >= ArgIndex);
+ QualType ArgType = TheCall->getArg(ArgIndex)->getType();
+ auto *VTy = ArgType->getAs<VectorType>();
+ // is the scalar or vector<scalar>
+ if (S->Context.hasSameUnqualifiedType(ArgType, Scalar) ||
+ (VTy &&
+ S->Context.hasSameUnqualifiedType(VTy->getElementType(), Scalar))) {
+ S->Diag(TheCall->getArg(0)->getBeginLoc(),
+ diag::err_typecheck_expect_scalar_or_vector_not_type)
+ << ArgType << Scalar;
+ return true;
+ }
+ return false;
+}
+
static bool CheckBoolSelect(Sema *S, CallExpr *TheCall) {
assert(TheCall->getNumArgs() == 3);
Expr *Arg1 = TheCall->getArg(1);
@@ -2002,6 +2019,20 @@ bool SemaHLSL::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
TheCall->setType(ArgTyA);
break;
}
+ case Builtin::BI__builtin_hlsl_wave_active_sum: {
+ 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 (CheckNotScalarType(&SemaRef, TheCall, getASTContext().BoolTy, 0))
+ return true;
+ ExprResult Expr = TheCall->getArg(0);
+ QualType ArgTyExpr = Expr.get()->getType();
+ 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/WaveActiveSum.hlsl b/clang/test/CodeGenHLSL/builtins/WaveActiveSum.hlsl
new file mode 100644
index 00000000000000..e5e463a6e9beea
--- /dev/null
+++ b/clang/test/CodeGenHLSL/builtins/WaveActiveSum.hlsl
@@ -0,0 +1,48 @@
+// 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_int
+int test_int(int expr) {
+ // CHECK-SPIRV: %[[#entry_tok:]] = call token @llvm.experimental.convergence.entry()
+ // CHECK-SPIRV: %[[RET:.*]] = call [[TY:.*]] @llvm.spv.wave.active.sum.i32([[TY]] %[[#]]) [ "convergencectrl"(token %[[#entry_tok]]) ]
+ // CHECK-DXIL: %[[RET:.*]] = call [[TY:.*]] @llvm.dx.wave.active.sum.i32([[TY]] %[[#]])
+ // CHECK: ret [[TY]] %[[RET]]
+ return WaveActiveSum(expr);
+}
+
+// CHECK-DXIL: declare [[TY]] @llvm.dx.wave.active.sum.i32([[TY]]) #[[#attr:]]
+// CHECK-SPIRV: declare [[TY]] @llvm.spv.wave.active.sum.i32([[TY]]) #[[#attr:]]
+
+// CHECK-LABEL: test_uint64_t
+uint64_t test_uint64_t(uint64_t expr) {
+ // CHECK-SPIRV: %[[#entry_tok1:]] = call token @llvm.experimental.convergence.entry()
+ // CHECK-SPIRV: %[[RET:.*]] = call [[TY:.*]] @llvm.spv.wave.active.sum.i64([[TY]] %[[#]]) [ "convergencectrl"(token %[[#entry_tok1]]) ]
+ // CHECK-DXIL: %[[RET:.*]] = call [[TY:.*]] @llvm.dx.wave.active.usum.i64([[TY]] %[[#]])
+ // CHECK: ret [[TY]] %[[RET]]
+ return WaveActiveSum(expr);
+}
+
+// CHECK-DXIL: declare [[TY]] @llvm.dx.wave.active.usum.i64([[TY]]) #[[#attr:]]
+// CHECK-SPIRV: declare [[TY]] @llvm.spv.wave.active.sum.i64([[TY]]) #[[#attr:]]
+
+// Test basic lowering to runtime function call with array and float value.
+
+// CHECK-LABEL: test_floatv4
+float4 test_floatv4(float4 expr) {
+ // CHECK-SPIRV: %[[#entry_tok2:]] = call token @llvm.experimental.convergence.entry()
+ // CHECK-SPIRV: %[[RET1:.*]] = call [[TY1:.*]] @llvm.spv.wave.active.sum.v4f32([[TY1]] %[[#]]) [ "convergencectrl"(token %[[#entry_tok2]]) ]
+ // CHECK-DXIL: %[[RET1:.*]] = call [[TY1:.*]] @llvm.dx.wave.active.sum.v4f32([[TY1]] %[[#]])
+ // CHECK: ret [[TY1]] %[[RET1]]
+ return WaveActiveSum(expr);
+}
+
+// CHECK-DXIL: declare [[TY1]] @llvm.dx.wave.active.sum.v4f32([[TY1]]) #[[#attr]]
+// CHECK-SPIRV: declare [[TY1]] @llvm.spv.wave.active.sum.v4f32([[TY1]]) #[[#attr]]
+
+// CHECK: attributes #[[#attr]] = {{{.*}} convergent {{.*}}}
diff --git a/clang/test/SemaHLSL/BuiltIns/WaveActiveSum-errors.hlsl b/clang/test/SemaHLSL/BuiltIns/WaveActiveSum-errors.hlsl
new file mode 100644
index 00000000000000..e475df8994f3e7
--- /dev/null
+++ b/clang/test/SemaHLSL/BuiltIns/WaveActiveSum-errors.hlsl
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -emit-llvm-only -disable-llvm-passes -verify
+
+int test_too_few_arg() {
+ return __builtin_hlsl_wave_active_sum();
+ // expected-error at -1 {{too few arguments to function call, expected 1, have 0}}
+}
+
+float2 test_too_many_arg(float2 p0) {
+ return __builtin_hlsl_wave_active_sum(p0, p0);
+ // expected-error at -1 {{too many arguments to function call, expected 1, have 2}}
+}
+
+bool test_expr_bool_type_check(bool p0) {
+ return __builtin_hlsl_wave_active_sum(p0);
+ // expected-error at -1 {{invalid operand of type 'bool' where 'bool' or a vector of such type is not allowed}}
+}
+
+bool2 test_expr_bool_vec_type_check(bool2 p0) {
+ return __builtin_hlsl_wave_active_sum(p0);
+ // expected-error at -1 {{invalid operand of type 'bool2' (aka 'vector<bool, 2>') where 'bool' or a vector of such type is not allowed}}
+}
+
+struct S { float f; };
+
+S test_expr_struct_type_check(S p0) {
+ return __builtin_hlsl_wave_active_sum(p0);
+ // expected-error at -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
index 27a437a83be6dd..0ad6c5e1aa2351 100644
--- a/llvm/include/llvm/IR/IntrinsicsDirectX.td
+++ b/llvm/include/llvm/IR/IntrinsicsDirectX.td
@@ -85,6 +85,8 @@ def int_dx_umad : DefaultAttrsIntrinsic<[llvm_anyint_ty], [LLVMMatchType<0>, LLV
def int_dx_normalize : DefaultAttrsIntrinsic<[LLVMMatchType<0>], [llvm_anyfloat_ty], [IntrNoMem]>;
def int_dx_rsqrt : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>], [IntrNoMem]>;
def int_dx_wave_getlaneindex : DefaultAttrsIntrinsic<[llvm_i32_ty], [], [IntrConvergent, IntrNoMem]>;
+def int_dx_wave_active_sum : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
+def int_dx_wave_active_usum : DefaultAttrsIntrinsic<[llvm_anyint_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
def int_dx_wave_is_first_lane : DefaultAttrsIntrinsic<[llvm_i1_ty], [], [IntrConvergent]>;
def int_dx_wave_readlane : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>, llvm_i32_ty], [IntrConvergent, IntrNoMem]>;
def int_dx_sign : DefaultAttrsIntrinsic<[LLVMScalarOrSameVectorWidth<0, llvm_i32_ty>], [llvm_any_ty], [IntrNoMem]>;
diff --git a/llvm/include/llvm/IR/IntrinsicsSPIRV.td b/llvm/include/llvm/IR/IntrinsicsSPIRV.td
index 6df2eb156a0774..b90190b8963dbe 100644
--- a/llvm/include/llvm/IR/IntrinsicsSPIRV.td
+++ b/llvm/include/llvm/IR/IntrinsicsSPIRV.td
@@ -83,6 +83,7 @@ let TargetPrefix = "spv" in {
DefaultAttrsIntrinsic<[LLVMVectorElementType<0>],
[llvm_anyint_ty, LLVMScalarOrSameVectorWidth<0, LLVMVectorElementType<0>>],
[IntrNoMem, Commutative] >;
+ def int_spv_wave_active_sum : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>], [IntrConvergent, IntrNoMem]>;
def int_spv_wave_is_first_lane : DefaultAttrsIntrinsic<[llvm_i1_ty], [], [IntrConvergent]>;
def int_spv_wave_readlane : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>, llvm_i32_ty], [IntrConvergent, IntrNoMem]>;
def int_spv_sign : DefaultAttrsIntrinsic<[LLVMScalarOrSameVectorWidth<0, llvm_i32_ty>], [llvm_any_ty], [IntrNoMem]>;
diff --git a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
index d9377fe4b91a1a..54ab680d27b88e 100644
--- a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
@@ -164,6 +164,9 @@ class SPIRVInstructionSelector : public InstructionSelector {
bool selectIntegerDot(Register ResVReg, const SPIRVType *ResType,
MachineInstr &I) const;
+ bool selectWaveActiveSum(Register ResVReg, const SPIRVType *ResType,
+ MachineInstr &I) const;
+
void renderImm32(MachineInstrBuilder &MIB, const MachineInstr &I,
int OpIdx) const;
void renderFImm64(MachineInstrBuilder &MIB, const MachineInstr &I,
@@ -1782,6 +1785,34 @@ bool SPIRVInstructionSelector::selectWaveReadLaneAt(Register ResVReg,
.addUse(I.getOperand(3).getReg());
}
+bool SPIRVInstructionSelector::selectWaveActiveSum(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.");
+
+ // IntTy is used to define the execution scope, set to 3 to denote a
+ // cross-lane interaction equivalent to a SPIR-V subgroup.
+ SPIRVType *IntTy = GR.getOrCreateSPIRVIntegerType(32, I, TII);
+
+ // Retreive the operation to use based on input type
+ bool IsFloatTy = GR.isScalarOrVectorOfType(InputRegister, SPIRV::OpTypeFloat);
+ auto Opcode =
+ IsFloatTy ? SPIRV::OpGroupNonUniformFAdd : SPIRV::OpGroupNonUniformIAdd;
+ return BuildMI(BB, I, I.getDebugLoc(), TII.get(Opcode))
+ .addDef(ResVReg)
+ .addUse(GR.getSPIRVTypeID(ResType))
+ .addUse(GR.getOrCreateConstInt(3, I, IntTy, TII))
+ .addImm(0) // group operation set to 0 to denote a reduction operation
+ .addUse(I.getOperand(2).getReg());
+}
+
bool SPIRVInstructionSelector::selectBitreverse(Register ResVReg,
const SPIRVType *ResType,
MachineInstr &I) const {
@@ -2559,6 +2590,8 @@ bool SPIRVInstructionSelector::selectIntrinsic(Register ResVReg,
} break;
case Intrinsic::spv_saturate:
return selectSaturate(ResVReg, ResType, I);
+ case Intrinsic::spv_wave_active_sum:
+ return selectWaveActiveSum(ResVReg, ResType, I);
case Intrinsic::spv_wave_is_first_lane: {
SPIRVType *IntTy = GR.getOrCreateSPIRVIntegerType(32, I, TII);
return BuildMI(BB, I, I.getDebugLoc(),
diff --git a/llvm/test/CodeGen/SP...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/112400
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