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[mlir] Prepare convert-gpu-to-spirv for OpenCL support #69941

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Merged
merged 9 commits into from
Nov 6, 2023
Merged

[mlir] Prepare convert-gpu-to-spirv for OpenCL support #69941

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7ca3f97
[MLIR] Update convert-gpu-to-spirv pass to prepare using GPU compilat…
silee2 Oct 23, 2023
02ff96c
Address reviewer comments.
silee2 Oct 27, 2023
561af5d
Run clang formatter.
silee2 Oct 27, 2023
6417cb7
Address reviewers suggestions.
silee2 Oct 28, 2023
d73edae
Merge branch 'main' into opencl_memspace
silee2 Oct 28, 2023
57c0d76
Check for spirv::MemoryModel only if mapping MemRef memory space to S…
silee2 Oct 28, 2023
4241a60
Remove redundant namespace resolution.
silee2 Oct 28, 2023
7f0efa4
Another reviewer suggestion.
silee2 Oct 30, 2023
dfb3fcb
Merge branch 'main' into opencl_memspace
silee2 Oct 30, 2023
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2 changes: 1 addition & 1 deletion mlir/include/mlir/Conversion/Passes.td
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Original file line number Diff line number Diff line change
Expand Up @@ -579,8 +579,8 @@ def ConvertGPUToSPIRV : Pass<"convert-gpu-to-spirv", "ModuleOp"> {
}];
let constructor = "mlir::createConvertGPUToSPIRVPass()";
let dependentDialects = [
"spirv::SPIRVDialect",
"func::FuncDialect",
"spirv::SPIRVDialect",
];
let options = [
Option<"use64bitIndex", "use-64bit-index",
Expand Down
19 changes: 11 additions & 8 deletions mlir/lib/Conversion/GPUToSPIRV/GPUToSPIRVPass.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,7 @@ void GPUToSPIRVPass::runOnOperation() {
SmallVector<Operation *, 1> gpuModules;
OpBuilder builder(context);

auto getTargetEnvFromGPUModuleOp = [=](gpu::GPUModuleOp moduleOp) {
auto getTargetEnvFromGPUModuleOp = [*this](gpu::GPUModuleOp moduleOp) {
Operation *gpuModule = moduleOp.getOperation();
auto targetAttr = spirv::lookupTargetEnvOrDefault(gpuModule);
std::unique_ptr<ConversionTarget> target =
Expand All @@ -76,22 +76,24 @@ void GPUToSPIRVPass::runOnOperation() {
// This works fine for Vulkan shader that has a dedicated runner.
// But OpenCL kernel needs SPIRV module placed inside original GPU module as
// OpenCL uses GPU compilation pipeline.
auto targetEnv = getTargetEnvFromGPUModuleOp(moduleOp);
const mlir::spirv::TargetEnv& targetEnv = getTargetEnvFromGPUModuleOp(moduleOp);
FailureOr<spirv::MemoryModel> memoryModel =
spirv::getMemoryModel(targetEnv);
if (failed(memoryModel))
return signalPassFailure();
(memoryModel == spirv::MemoryModel::OpenCL)
? builder.setInsertionPoint(moduleOp.getBody(),
moduleOp.getBody()->begin())
: builder.setInsertionPoint(moduleOp.getOperation());
if (memoryModel == spirv::MemoryModel::OpenCL) {
builder.setInsertionPoint(moduleOp.getBody(),
moduleOp.getBody()->begin());
} else {
builder.setInsertionPoint(moduleOp.getOperation());
}
gpuModules.push_back(builder.clone(*moduleOp.getOperation()));
});

// Run conversion for each module independently as they can have different
// TargetEnv attributes.
for (Operation *gpuModule : gpuModules) {
auto targetAttr = spirv::lookupTargetEnvOrDefault(gpuModule);
mlir::spirv::TargetEnvAttr targetAttr = spirv::lookupTargetEnvOrDefault(gpuModule);
std::unique_ptr<ConversionTarget> target =
SPIRVConversionTarget::get(targetAttr);

Expand Down Expand Up @@ -143,11 +145,12 @@ void GPUToSPIRVPass::runOnOperation() {
if (failed(applyFullConversion(gpuModule, *target, std::move(patterns))))
return signalPassFailure();
}

// In case of OpenCL, gpu.func in original gpu.module needs to replaced with
// an empty func.func with same arguments as gpu.func. And it also needs
// gpu.kernel attribute set.
module.walk([&](gpu::GPUModuleOp moduleOp) {
auto targetEnv = getTargetEnvFromGPUModuleOp(moduleOp);
const mlir::spirv::TargetEnv& targetEnv = getTargetEnvFromGPUModuleOp(moduleOp);
FailureOr<spirv::MemoryModel> memoryModel =
spirv::getMemoryModel(targetEnv);
if (failed(memoryModel))
Expand Down