Upstreaming clangIR PR: https://github.com/llvm/clangir/pull/2091
This patch adds support for AMDGPU-specific function attributes for HIP
kernels
Added setTargetAttributes for AMDGPUTargetCIRGenInfo to set kernel
attributes
Added generic string attribute handler in amendFunction to translate
string-values with "cir." prefix function attributes to LLVM function
attributes
Follows OGCG AMDGPU implementation from
"clang/lib/CodeGen/Targets/AMDGPU.cpp".
Add the amendOperation override to handle CIR dialect attributes during
MLIR-to-LLVM IR translation. This dispatches to amendModule for ModuleOp,
enabling module metadata.
This PR also adds support to emit AMDGPU-specific module flags
amdhsa_code_object_version and amdgpu_printf_kind to match OGCG
behavior.
In CIRGenModule, the flags are stored as CIR module attributes:
cir.amdhsa_code_object_version (integer)
cir.amdgpu_printf_kind (string: "hostcall" or "buffered")
During lowering to LLVM IR (in LowerToLLVMIR.cpp), these attributes are
converted to LLVM module flags.
Upstreaming basic changes from clangIR PRs:
61e9ebd9f8https://github.com/llvm/clangir/pull/768https://github.com/llvm/clangir/pull/773https://github.com/llvm/clangir/pull/2100
The ClangIR CFG has to be flat before it can be lowered to LLVM IR. That
is, there can be no nested regions and all blocks in a region must
belong to the parent region. Currently only cir.scope operations violate
these rules, so the initial implementation of the cir-flatten-cfg pass
only has to transform scope operations.
