[mlir][gpu] Update LaunchFuncOp lowering in GPU to LLVM (llvm#94991)

This patch updates the lowering of `LaunchFuncOp` in GPU to LLVM to only
legalize the operation with the converted operands, effectively removing
the lowering used by the old serialization pipeline.
It also removes all remaining uses of the old gpu serialization
infrastructure in `gpu-to-llvm`.

See [Compilation overview | 'gpu' Dialect - MLIR
docs](https://mlir.llvm.org/docs/Dialects/GPU/#compilation-overview) for
additional information on the target attributes compilation pipeline
that replaced the old serialization pipeline.

Author: fabianmcg

mlir/include/mlir/Conversion/GPUCommon/GPUCommonPass.h

@@ -46,9 +46,6 @@ class LLVMDialect;
 #define GEN_PASS_DECL_GPUTOLLVMCONVERSIONPASS
 #include "mlir/Conversion/Passes.h.inc"
 
-using OwnedBlob = std::unique_ptr<std::vector<char>>;
-using BlobGenerator =
-    std::function<OwnedBlob(const std::string &, Location, StringRef)>;
 using LoweringCallback = std::function<std::unique_ptr<llvm::Module>(
     Operation *, llvm::LLVMContext &, StringRef)>;
 
@@ -66,10 +63,9 @@ struct FunctionCallBuilder {
 
 /// Collect a set of patterns to convert from the GPU dialect to LLVM and
 /// populate converter for gpu types.
-void populateGpuToLLVMConversionPatterns(
-    LLVMTypeConverter &converter, RewritePatternSet &patterns,
-    StringRef gpuBinaryAnnotation = {}, bool kernelBarePtrCallConv = false,
-    SymbolTable *cachedModuleTable = nullptr);
+void populateGpuToLLVMConversionPatterns(LLVMTypeConverter &converter,
+                                         RewritePatternSet &patterns,
+                                         bool kernelBarePtrCallConv = false);
 
 /// A function that maps a MemorySpace enum to a target-specific integer value.
 using MemorySpaceMapping = std::function<unsigned(gpu::AddressSpace)>;

mlir/include/mlir/Conversion/Passes.td

@@ -478,11 +478,7 @@ def GpuToLLVMConversionPass : Pass<"gpu-to-llvm", "ModuleOp"> {
            /*default=*/"false",
              "Use bare pointers to pass memref arguments to kernels. "
              "The kernel must use the same setting for this option."
-           >,
-    Option<"gpuBinaryAnnotation", "gpu-binary-annotation", "std::string",
-               /*default=*/"gpu::getDefaultGpuBinaryAnnotation()",
-               "Annotation attribute string for GPU binary"
-               >
+           >
   ];
 
   let dependentDialects = [