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Set the layout rule explicitly for raw buffer operations #6701

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Jun 25, 2024
Merged

Set the layout rule explicitly for raw buffer operations #6701

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2 changes: 2 additions & 0 deletions tools/clang/lib/SPIRV/SpirvEmitter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -14263,6 +14263,7 @@ SpirvEmitter::loadDataFromRawAddress(SpirvInstruction *addressInUInt64,
SpirvUnaryOp *address = spvBuilder.createUnaryOp(
spv::Op::OpBitcast, bufferPtrType, addressInUInt64, loc);
address->setStorageClass(spv::StorageClass::PhysicalStorageBuffer);
address->setLayoutRule(spirvOptions.sBufferLayoutRule);

SpirvLoad *loadInst =
dyn_cast<SpirvLoad>(spvBuilder.createLoad(bufferType, address, loc));
Expand Down Expand Up @@ -14291,6 +14292,7 @@ SpirvEmitter::storeDataToRawAddress(SpirvInstruction *addressInUInt64,
if (!address)
return nullptr;
address->setStorageClass(spv::StorageClass::PhysicalStorageBuffer);
address->setLayoutRule(spirvOptions.sBufferLayoutRule);

// If the source value has a different layout, it is not safe to directly
// store it. It needs to be component-wise reconstructed to the new layout.
Expand Down
16 changes: 16 additions & 0 deletions tools/clang/test/CodeGenSPIRV/intrinsics.vkrawbufferload.hlsl
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Expand Up @@ -4,6 +4,14 @@
// CHECK: OpExtension "SPV_KHR_physical_storage_buffer"
// CHECK: OpMemoryModel PhysicalStorageBuffer64 GLSL450

// CHECK: OpMemberDecorate %BufferData_0 0 Offset 0
// CHECK: OpMemberDecorate %BufferData_0 1 Offset 4
// CHECK: %BufferData_0 = OpTypeStruct %float %v3float
struct BufferData {
float f;
float3 v;
};

uint64_t Address;
float4 main() : SV_Target0 {
// CHECK: [[addr:%[0-9]+]] = OpLoad %ulong
Expand Down Expand Up @@ -34,5 +42,13 @@ float4 main() : SV_Target0 {
// CHECK-NEXT: OpStore %v [[load_3]]
uint v = vk::RawBufferLoad(Address);

// CHECK: [[buf:%[0-9]+]] = OpBitcast %_ptr_PhysicalStorageBuffer_BufferData_0
// CHECK-NEXT: [[load:%[0-9]+]] = OpLoad %BufferData_0 [[buf]] Aligned 4
BufferData d = vk::RawBufferLoad<BufferData>(Address);

// CHECK: [[buf:%[0-9]+]] = OpBitcast %_ptr_PhysicalStorageBuffer_BufferData_0 %ulong_0
// CHECK-NEXT: [[load:%[0-9]+]] = OpLoad %BufferData_0 [[buf]] Aligned 4
d = vk::RawBufferLoad<BufferData>(0);

return float4(w.x, x, y, z);
}
10 changes: 10 additions & 0 deletions tools/clang/test/CodeGenSPIRV/intrinsics.vkrawbufferstore.hlsl
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Expand Up @@ -75,4 +75,14 @@ void main(uint3 tid : SV_DispatchThreadID) {
xyzw.z = 84;
xyzw.w = 69;
vk::RawBufferStore<XYZW>(Address, xyzw);

// CHECK: [[xyzwval:%[0-9]+]] = OpLoad %XYZW %xyzw
// CHECK-NEXT: [[buf_3:%[0-9]+]] = OpBitcast %_ptr_PhysicalStorageBuffer_XYZW_0 %ulong_0
// CHECK-NEXT: [[member1:%[0-9]+]] = OpCompositeExtract %int [[xyzwval]] 0
// CHECK-NEXT: [[member2:%[0-9]+]] = OpCompositeExtract %int [[xyzwval]] 1
// CHECK-NEXT: [[member3:%[0-9]+]] = OpCompositeExtract %int [[xyzwval]] 2
// CHECK-NEXT: [[member4:%[0-9]+]] = OpCompositeExtract %int [[xyzwval]] 3
// CHECK-NEXT: [[p_xyzwval:%[0-9]+]] = OpCompositeConstruct %XYZW_0 [[member1]] [[member2]] [[member3]] [[member4]]
// CHECK-NEXT: OpStore [[buf_3]] [[p_xyzwval]] Aligned 4
vk::RawBufferStore<XYZW>(0, xyzw);
}
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