[mlir][gpu] Update LaunchFuncOp lowering in GPU to LLVM

This patch updates the lowering of `LaunchFuncOp` in GPU to LLVM to only
legalize the operation. It also removes all remaining uses of the old
compilation infrastructure.

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 = [