[clang] [llvm] Add cross builtins and cross HLSL function to DirectX and SPIR-V backend (PR #109180)
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Wed Sep 18 12:22:25 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-directx
Author: Joshua Batista (bob80905)
<details>
<summary>Changes</summary>
This PR adds the step intrinsic and an HLSL function that uses it.
The SPIRV backend is also implemented.
Used https://github.com/llvm/llvm-project/pull/106471 as a reference.
Fixes https://github.com/llvm/llvm-project/issues/99095
---
Full diff: https://github.com/llvm/llvm-project/pull/109180.diff
13 Files Affected:
- (modified) clang/include/clang/Basic/Builtins.td (+6)
- (modified) clang/lib/CodeGen/CGBuiltin.cpp (+15)
- (modified) clang/lib/CodeGen/CGHLSLRuntime.h (+1)
- (modified) clang/lib/Headers/hlsl/hlsl_intrinsics.h (+22)
- (modified) clang/lib/Sema/SemaHLSL.cpp (+14)
- (added) clang/test/CodeGenHLSL/builtins/cross.hlsl (+36)
- (added) clang/test/SemaHLSL/BuiltIns/cross-errors.hlsl (+31)
- (modified) llvm/include/llvm/IR/IntrinsicsDirectX.td (+1)
- (modified) llvm/include/llvm/IR/IntrinsicsSPIRV.td (+1)
- (modified) llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp (+40)
- (modified) llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp (+23-1)
- (added) llvm/test/CodeGen/DirectX/cross.ll (+57)
- (added) llvm/test/CodeGen/SPIRV/hlsl-intrinsics/cross.ll (+33)
``````````diff
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
index 8c5d7ad763bf97..c4735b59dfb0be 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -4709,6 +4709,12 @@ def HLSLCreateHandle : LangBuiltin<"HLSL_LANG"> {
let Prototype = "void*(unsigned char)";
}
+def HLSLCross: LangBuiltin<"HLSL_LANG"> {
+ let Spellings = ["__builtin_hlsl_cross"];
+ let Attributes = [NoThrow, Const];
+ let Prototype = "void(...)";
+}
+
def HLSLDotProduct : LangBuiltin<"HLSL_LANG"> {
let Spellings = ["__builtin_hlsl_dot"];
let Attributes = [NoThrow, Const];
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 7e18aafcdd4b8a..0883ad17ce0ffd 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -18639,6 +18639,21 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
IsUnsigned ? Intrinsic::dx_uclamp : Intrinsic::dx_clamp,
ArrayRef<Value *>{OpX, OpMin, OpMax}, nullptr, "dx.clamp");
}
+ case Builtin::BI__builtin_hlsl_cross: {
+ Value *Op0 = EmitScalarExpr(E->getArg(0));
+ Value *Op1 = EmitScalarExpr(E->getArg(1));
+ assert(E->getArg(0)->getType()->hasFloatingRepresentation() &&
+ E->getArg(1)->getType()->hasFloatingRepresentation() &&
+ "step operands must have a float representation");
+ // make sure each vector has exactly 3 elements
+ auto *XVecTy1 = E->getArg(0)->getType()->getAs<VectorType>();
+ auto *XVecTy2 = E->getArg(1)->getType()->getAs<VectorType>();
+ assert(XVecTy1->getNumElements() == 3 && XVecTy2->getNumElements() == 3 &&
+ "input vectors must have 3 elements each");
+ return Builder.CreateIntrinsic(
+ /*ReturnType=*/Op0->getType(), CGM.getHLSLRuntime().getCrossIntrinsic(),
+ ArrayRef<Value *>{Op0, Op1}, nullptr, "hlsl.cross");
+ }
case Builtin::BI__builtin_hlsl_dot: {
Value *Op0 = EmitScalarExpr(E->getArg(0));
Value *Op1 = EmitScalarExpr(E->getArg(1));
diff --git a/clang/lib/CodeGen/CGHLSLRuntime.h b/clang/lib/CodeGen/CGHLSLRuntime.h
index a8aabca7348ffb..6722d2c7c50a2b 100644
--- a/clang/lib/CodeGen/CGHLSLRuntime.h
+++ b/clang/lib/CodeGen/CGHLSLRuntime.h
@@ -74,6 +74,7 @@ class CGHLSLRuntime {
GENERATE_HLSL_INTRINSIC_FUNCTION(All, all)
GENERATE_HLSL_INTRINSIC_FUNCTION(Any, any)
+ GENERATE_HLSL_INTRINSIC_FUNCTION(Cross, cross)
GENERATE_HLSL_INTRINSIC_FUNCTION(Frac, frac)
GENERATE_HLSL_INTRINSIC_FUNCTION(Length, length)
GENERATE_HLSL_INTRINSIC_FUNCTION(Lerp, lerp)
diff --git a/clang/lib/Headers/hlsl/hlsl_intrinsics.h b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
index 6cd6a2caf19994..e4b40978dea6b9 100644
--- a/clang/lib/Headers/hlsl/hlsl_intrinsics.h
+++ b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
@@ -1563,6 +1563,28 @@ uint64_t3 reversebits(uint64_t3);
_HLSL_BUILTIN_ALIAS(__builtin_elementwise_bitreverse)
uint64_t4 reversebits(uint64_t4);
+//===----------------------------------------------------------------------===//
+// cross builtins
+//===----------------------------------------------------------------------===//
+
+/// \fn T cross(T x, T y)
+/// \brief Returns the cross product of two floating-point, 3D vectors.
+/// \param x [in] The first floating-point, 3D vector.
+/// \param y [in] The second floating-point, 3D vector.
+///
+/// Result is the cross product of x and y, i.e., the resulting
+/// components are, in order :
+/// x[1] * y[2] - y[1] * x[2]
+/// x[2] * y[0] - y[2] * x[0]
+/// x[0] * y[1] - y[0] * x[1]
+
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_cross)
+half3 cross(half3, half3);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_cross)
+float3 cross(float3, float3);
+
//===----------------------------------------------------------------------===//
// rcp builtins
//===----------------------------------------------------------------------===//
diff --git a/clang/lib/Sema/SemaHLSL.cpp b/clang/lib/Sema/SemaHLSL.cpp
index a303f211501348..e7e7a3c259e27a 100644
--- a/clang/lib/Sema/SemaHLSL.cpp
+++ b/clang/lib/Sema/SemaHLSL.cpp
@@ -1704,6 +1704,20 @@ bool SemaHLSL::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
return true;
break;
}
+ case Builtin::BI__builtin_hlsl_cross: {
+ if (SemaRef.checkArgCount(TheCall, 2))
+ return true;
+ if (CheckVectorElementCallArgs(&SemaRef, TheCall))
+ return true;
+ if (CheckFloatOrHalfRepresentations(&SemaRef, TheCall))
+ return true;
+
+ ExprResult A = TheCall->getArg(0);
+ QualType ArgTyA = A.get()->getType();
+ // return type is the same as the input type
+ TheCall->setType(ArgTyA);
+ break;
+ }
case Builtin::BI__builtin_hlsl_dot: {
if (SemaRef.checkArgCount(TheCall, 2))
return true;
diff --git a/clang/test/CodeGenHLSL/builtins/cross.hlsl b/clang/test/CodeGenHLSL/builtins/cross.hlsl
new file mode 100644
index 00000000000000..047e7fef7136fe
--- /dev/null
+++ b/clang/test/CodeGenHLSL/builtins/cross.hlsl
@@ -0,0 +1,36 @@
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN: dxil-pc-shadermodel6.3-library %s -fnative-half-type \
+// RUN: -emit-llvm -disable-llvm-passes -o - | FileCheck %s \
+// RUN: --check-prefixes=CHECK,NATIVE_HALF \
+// RUN: -DFNATTRS=noundef -DTARGET=dx
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN: dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
+// RUN: -o - | FileCheck %s --check-prefixes=CHECK,NO_HALF \
+// RUN: -DFNATTRS=noundef -DTARGET=dx
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN: spirv-unknown-vulkan-compute %s -fnative-half-type \
+// RUN: -emit-llvm -disable-llvm-passes -o - | FileCheck %s \
+// RUN: --check-prefixes=CHECK,NATIVE_HALF \
+// RUN: -DFNATTRS="spir_func noundef" -DTARGET=spv
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN: spirv-unknown-vulkan-compute %s -emit-llvm -disable-llvm-passes \
+// RUN: -o - | FileCheck %s --check-prefixes=CHECK,NO_HALF \
+// RUN: -DFNATTRS="spir_func noundef" -DTARGET=spv
+
+// NATIVE_HALF: define [[FNATTRS]] <3 x half> @
+// NATIVE_HALF: call <3 x half> @llvm.[[TARGET]].cross.v3f16(<3 x half>
+// NO_HALF: call <3 x float> @llvm.[[TARGET]].cross.v3f32(<3 x float>
+// NATIVE_HALF: ret <3 x half> %hlsl.cross
+// NO_HALF: ret <3 x float> %hlsl.cross
+half3 test_cross_half3(half3 p0, half3 p1)
+{
+ return cross(p0, p1);
+}
+
+// CHECK: define [[FNATTRS]] <3 x float> @
+// CHECK: %hlsl.cross = call <3 x float> @llvm.[[TARGET]].cross.v3f32(
+// CHECK: ret <3 x float> %hlsl.cross
+float3 test_cross_float3(float3 p0, float3 p1)
+{
+ return cross(p0, p1);
+}
diff --git a/clang/test/SemaHLSL/BuiltIns/cross-errors.hlsl b/clang/test/SemaHLSL/BuiltIns/cross-errors.hlsl
new file mode 100644
index 00000000000000..40ab4b533a495e
--- /dev/null
+++ b/clang/test/SemaHLSL/BuiltIns/cross-errors.hlsl
@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -fnative-half-type -disable-llvm-passes -verify -verify-ignore-unexpected
+
+void test_too_few_arg()
+{
+ return __builtin_hlsl_cross();
+ // expected-error at -1 {{too few arguments to function call, expected 2, have 0}}
+}
+
+void test_too_many_arg(float3 p0)
+{
+ return __builtin_hlsl_cross(p0, p0, p0);
+ // expected-error at -1 {{too many arguments to function call, expected 2, have 3}}
+}
+
+bool builtin_bool_to_float_type_promotion(bool p1)
+{
+ return __builtin_hlsl_cross(p1, p1);
+ // expected-error at -1 {passing 'bool' to parameter of incompatible type 'float'}}
+}
+
+bool builtin_cross_int_to_float_promotion(int p1)
+{
+ return __builtin_hlsl_cross(p1, p1);
+ // expected-error at -1 {{passing 'int' to parameter of incompatible type 'float'}}
+}
+
+bool2 builtin_cross_int2_to_float2_promotion(int2 p1)
+{
+ return __builtin_hlsl_cross(p1, p1);
+ // expected-error at -1 {{passing 'int2' (aka 'vector<int, 2>') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(float)))) float' (vector of 2 'float' values)}}
+}
diff --git a/llvm/include/llvm/IR/IntrinsicsDirectX.td b/llvm/include/llvm/IR/IntrinsicsDirectX.td
index 3ce7b8b987ef86..f4242772bab20c 100644
--- a/llvm/include/llvm/IR/IntrinsicsDirectX.td
+++ b/llvm/include/llvm/IR/IntrinsicsDirectX.td
@@ -44,6 +44,7 @@ def int_dx_cast_handle : Intrinsic<[llvm_any_ty], [llvm_any_ty]>;
def int_dx_all : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_any_ty], [IntrNoMem]>;
def int_dx_any : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_any_ty], [IntrNoMem]>;
def int_dx_clamp : DefaultAttrsIntrinsic<[llvm_any_ty], [LLVMMatchType<0>, LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
+def int_dx_cross : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
def int_dx_uclamp : DefaultAttrsIntrinsic<[llvm_anyint_ty], [LLVMMatchType<0>, LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
def int_dx_saturate : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>], [IntrNoMem]>;
diff --git a/llvm/include/llvm/IR/IntrinsicsSPIRV.td b/llvm/include/llvm/IR/IntrinsicsSPIRV.td
index a4c01952927175..480b391bd54fdf 100644
--- a/llvm/include/llvm/IR/IntrinsicsSPIRV.td
+++ b/llvm/include/llvm/IR/IntrinsicsSPIRV.td
@@ -60,6 +60,7 @@ let TargetPrefix = "spv" in {
Intrinsic<[ llvm_ptr_ty ], [llvm_i8_ty], [IntrWillReturn]>;
def int_spv_all : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_any_ty]>;
def int_spv_any : DefaultAttrsIntrinsic<[llvm_i1_ty], [llvm_any_ty]>;
+ def int_spv_cross : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
def int_spv_frac : DefaultAttrsIntrinsic<[LLVMMatchType<0>], [llvm_anyfloat_ty]>;
def int_spv_lerp : Intrinsic<[LLVMMatchType<0>], [llvm_anyfloat_ty, LLVMMatchType<0>,LLVMMatchType<0>],
[IntrNoMem, IntrWillReturn] >;
diff --git a/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp b/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp
index dd73b895b14d37..e921dffede38f8 100644
--- a/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp
+++ b/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp
@@ -43,6 +43,7 @@ static bool isIntrinsicExpansion(Function &F) {
case Intrinsic::dx_all:
case Intrinsic::dx_any:
case Intrinsic::dx_clamp:
+ case Intrinsic::dx_cross:
case Intrinsic::dx_uclamp:
case Intrinsic::dx_lerp:
case Intrinsic::dx_length:
@@ -73,6 +74,42 @@ static Value *expandAbs(CallInst *Orig) {
"dx.max");
}
+static Value *expandCrossIntrinsic(CallInst *Orig) {
+
+ VectorType *VT = cast<VectorType>(Orig->getType());
+ if (cast<FixedVectorType>(VT)->getNumElements() != 3)
+ report_fatal_error(Twine("return vector must have exactly 3 elements"),
+ /* gen_crash_diag=*/false);
+
+ Value *op0 = Orig->getOperand(0);
+ Value *op1 = Orig->getOperand(1);
+ IRBuilder<> Builder(Orig);
+
+ Value *op0_x = Builder.CreateExtractElement(op0, (uint64_t)0);
+ Value *op0_y = Builder.CreateExtractElement(op0, 1);
+ Value *op0_z = Builder.CreateExtractElement(op0, 2);
+
+ Value *op1_x = Builder.CreateExtractElement(op1, (uint64_t)0);
+ Value *op1_y = Builder.CreateExtractElement(op1, 1);
+ Value *op1_z = Builder.CreateExtractElement(op1, 2);
+
+ auto MulSub = [&](Value *x0, Value *y0, Value *x1, Value *y1) -> Value * {
+ Value *xy = Builder.CreateFMul(x0, y1);
+ Value *yx = Builder.CreateFMul(y0, x1);
+ return Builder.CreateFSub(xy, yx);
+ };
+
+ Value *yz_zy = MulSub(op0_y, op0_z, op1_y, op1_z);
+ Value *zx_xz = MulSub(op0_z, op0_x, op1_z, op1_x);
+ Value *xy_yx = MulSub(op0_x, op0_y, op1_x, op1_y);
+
+ Value *cross = UndefValue::get(VT);
+ cross = Builder.CreateInsertElement(cross, yz_zy, (uint64_t)0);
+ cross = Builder.CreateInsertElement(cross, zx_xz, 1);
+ cross = Builder.CreateInsertElement(cross, xy_yx, 2);
+ return cross;
+}
+
// Create appropriate DXIL float dot intrinsic for the given A and B operands
// The appropriate opcode will be determined by the size of the operands
// The dot product is placed in the position indicated by Orig
@@ -434,6 +471,9 @@ static bool expandIntrinsic(Function &F, CallInst *Orig) {
case Intrinsic::dx_any:
Result = expandAnyOrAllIntrinsic(Orig, IntrinsicId);
break;
+ case Intrinsic::dx_cross:
+ Result = expandCrossIntrinsic(Orig);
+ break;
case Intrinsic::dx_uclamp:
case Intrinsic::dx_clamp:
Result = expandClampIntrinsic(Orig, IntrinsicId);
diff --git a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
index b526c9f29f1e6a..677119840709aa 100644
--- a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
@@ -167,7 +167,8 @@ class SPIRVInstructionSelector : public InstructionSelector {
bool selectCmp(Register ResVReg, const SPIRVType *ResType,
unsigned comparisonOpcode, MachineInstr &I) const;
-
+ bool selectCross(Register ResVReg, const SPIRVType *ResType,
+ MachineInstr &I) const;
bool selectICmp(Register ResVReg, const SPIRVType *ResType,
MachineInstr &I) const;
bool selectFCmp(Register ResVReg, const SPIRVType *ResType,
@@ -1465,6 +1466,25 @@ bool SPIRVInstructionSelector::selectAny(Register ResVReg,
return selectAnyOrAll(ResVReg, ResType, I, SPIRV::OpAny);
}
+bool SPIRVInstructionSelector::selectCross(Register ResVReg,
+ const SPIRVType *ResType,
+ MachineInstr &I) const {
+
+ assert(I.getNumOperands() == 4);
+ assert(I.getOperand(2).isReg());
+ assert(I.getOperand(3).isReg());
+ MachineBasicBlock &BB = *I.getParent();
+
+ return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpExtInst))
+ .addDef(ResVReg)
+ .addUse(GR.getSPIRVTypeID(ResType))
+ .addImm(static_cast<uint32_t>(SPIRV::InstructionSet::GLSL_std_450))
+ .addImm(GL::Cross)
+ .addUse(I.getOperand(2).getReg())
+ .addUse(I.getOperand(3).getReg())
+ .constrainAllUses(TII, TRI, RBI);
+}
+
bool SPIRVInstructionSelector::selectFmix(Register ResVReg,
const SPIRVType *ResType,
MachineInstr &I) const {
@@ -2458,6 +2478,8 @@ bool SPIRVInstructionSelector::selectIntrinsic(Register ResVReg,
return selectAll(ResVReg, ResType, I);
case Intrinsic::spv_any:
return selectAny(ResVReg, ResType, I);
+ case Intrinsic::spv_cross:
+ return selectCross(ResVReg, ResType, I);
case Intrinsic::spv_lerp:
return selectFmix(ResVReg, ResType, I);
case Intrinsic::spv_length:
diff --git a/llvm/test/CodeGen/DirectX/cross.ll b/llvm/test/CodeGen/DirectX/cross.ll
new file mode 100644
index 00000000000000..90847ac635dbba
--- /dev/null
+++ b/llvm/test/CodeGen/DirectX/cross.ll
@@ -0,0 +1,57 @@
+; RUN: opt -S -dxil-intrinsic-expansion < %s | FileCheck %s --check-prefix=CHECK
+; RUN: opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library < %s | FileCheck %s --check-prefix=CHECK
+
+; Make sure dxil operation function calls for cross are generated for half/float.
+
+declare <3 x half> @llvm.dx.cross.v3f16(<3 x half>, <3 x half>)
+declare <3 x float> @llvm.dx.cross.v3f32(<3 x float>, <3 x float>)
+
+define noundef <3 x half> @test_cross_half3(<3 x half> noundef %p0, <3 x half> noundef %p1) {
+entry:
+ ; CHECK: %0 = extractelement <3 x half> %p0, i64 0
+ ; CHECK: %1 = extractelement <3 x half> %p0, i64 1
+ ; CHECK: %2 = extractelement <3 x half> %p0, i64 2
+ ; CHECK: %3 = extractelement <3 x half> %p1, i64 0
+ ; CHECK: %4 = extractelement <3 x half> %p1, i64 1
+ ; CHECK: %5 = extractelement <3 x half> %p1, i64 2
+ ; CHECK: %6 = fmul half %1, %5
+ ; CHECK: %7 = fmul half %2, %4
+ ; CHECK: %8 = fsub half %6, %7
+ ; CHECK: %9 = fmul half %2, %3
+ ; CHECK: %10 = fmul half %0, %5
+ ; CHECK: %11 = fsub half %9, %10
+ ; CHECK: %12 = fmul half %0, %4
+ ; CHECK: %13 = fmul half %1, %3
+ ; CHECK: %14 = fsub half %12, %13
+ ; CHECK: %15 = insertelement <3 x half> undef, half %8, i64 0
+ ; CHECK: %16 = insertelement <3 x half> %15, half %11, i64 1
+ ; CHECK: %17 = insertelement <3 x half> %16, half %14, i64 2
+ ; CHECK: ret <3 x half> %17
+ %hlsl.cross = call <3 x half> @llvm.dx.cross.v3f16(<3 x half> %p0, <3 x half> %p1)
+ ret <3 x half> %hlsl.cross
+}
+
+define noundef <3 x float> @test_cross_float3(<3 x float> noundef %p0, <3 x float> noundef %p1) {
+entry:
+ ; CHECK: %0 = extractelement <3 x float> %p0, i64 0
+ ; CHECK: %1 = extractelement <3 x float> %p0, i64 1
+ ; CHECK: %2 = extractelement <3 x float> %p0, i64 2
+ ; CHECK: %3 = extractelement <3 x float> %p1, i64 0
+ ; CHECK: %4 = extractelement <3 x float> %p1, i64 1
+ ; CHECK: %5 = extractelement <3 x float> %p1, i64 2
+ ; CHECK: %6 = fmul float %1, %5
+ ; CHECK: %7 = fmul float %2, %4
+ ; CHECK: %8 = fsub float %6, %7
+ ; CHECK: %9 = fmul float %2, %3
+ ; CHECK: %10 = fmul float %0, %5
+ ; CHECK: %11 = fsub float %9, %10
+ ; CHECK: %12 = fmul float %0, %4
+ ; CHECK: %13 = fmul float %1, %3
+ ; CHECK: %14 = fsub float %12, %13
+ ; CHECK: %15 = insertelement <3 x float> undef, float %8, i64 0
+ ; CHECK: %16 = insertelement <3 x float> %15, float %11, i64 1
+ ; CHECK: %17 = insertelement <3 x float> %16, float %14, i64 2
+ ; CHECK: ret <3 x float> %17
+ %hlsl.cross = call <3 x float> @llvm.dx.cross.v3f32(<3 x float> %p0, <3 x float> %p1)
+ ret <3 x float> %hlsl.cross
+}
diff --git a/llvm/test/CodeGen/SPIRV/hlsl-intrinsics/cross.ll b/llvm/test/CodeGen/SPIRV/hlsl-intrinsics/cross.ll
new file mode 100644
index 00000000000000..2e0eb8c429ac27
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/hlsl-intrinsics/cross.ll
@@ -0,0 +1,33 @@
+; RUN: llc -O0 -mtriple=spirv-unknown-unknown %s -o - | FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; Make sure SPIRV operation function calls for cross are lowered correctly.
+
+; CHECK-DAG: %[[#op_ext_glsl:]] = OpExtInstImport "GLSL.std.450"
+; CHECK-DAG: %[[#float_32:]] = OpTypeFloat 32
+; CHECK-DAG: %[[#float_16:]] = OpTypeFloat 16
+; CHECK-DAG: %[[#vec3_float_16:]] = OpTypeVector %[[#float_16]] 3
+; CHECK-DAG: %[[#vec3_float_32:]] = OpTypeVector %[[#float_32]] 3
+
+define noundef <3 x half> @cross_half4(<3 x half> noundef %a, <3 x half> noundef %b) {
+entry:
+ ; CHECK: %[[#]] = OpFunction %[[#vec3_float_16]] None %[[#]]
+ ; CHECK: %[[#arg0:]] = OpFunctionParameter %[[#vec3_float_16]]
+ ; CHECK: %[[#arg1:]] = OpFunctionParameter %[[#vec3_float_16]]
+ ; CHECK: %[[#]] = OpExtInst %[[#vec3_float_16]] %[[#op_ext_glsl]] Cross %[[#arg0]] %[[#arg1]]
+ %hlsl.cross = call <3 x half> @llvm.spv.cross.v4f16(<3 x half> %a, <3 x half> %b)
+ ret <3 x half> %hlsl.cross
+}
+
+define noundef <3 x float> @cross_float4(<3 x float> noundef %a, <3 x float> noundef %b) {
+entry:
+ ; CHECK: %[[#]] = OpFunction %[[#vec3_float_32]] None %[[#]]
+ ; CHECK: %[[#arg0:]] = OpFunctionParameter %[[#vec3_float_32]]
+ ; CHECK: %[[#arg1:]] = OpFunctionParameter %[[#vec3_float_32]]
+ ; CHECK: %[[#]] = OpExtInst %[[#vec3_float_32]] %[[#op_ext_glsl]] Cross %[[#arg0]] %[[#arg1]]
+ %hlsl.cross = call <3 x float> @llvm.spv.cross.v4f32(<3 x float> %a, <3 x float> %b)
+ ret <3 x float> %hlsl.cross
+}
+
+declare <3 x half> @llvm.spv.cross.v4f16(<3 x half>, <3 x half>)
+declare <3 x float> @llvm.spv.cross.v4f32(<3 x float>, <3 x float>)
``````````
</details>
https://github.com/llvm/llvm-project/pull/109180
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