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Author SHA1 Message Date
Zi Xuan Wu 365c405411 [CSKY 2/n] Add basic tablegen infra for CSKY 
This introduce basic tablegen infra such as CSKY{InstrFormats,InstrInfo,RegisterInfo,}.td.
For now, only add instruction definitions for basic CSKY ISA operations, and the instruction format and register info are almost complete.

Our initial target is a working MC layer rather than codegen, so appropriate SelectionDAG patterns will come later.

Differential Revision: https://reviews.llvm.org/D89180
 2020-12-07 11:56:09 +08:00
serge-sans-paille 9218ff50f9 llvmbuildectomy - replace llvm-build by plain cmake 
No longer rely on an external tool to build the llvm component layout.

Instead, leverage the existing `add_llvm_componentlibrary` cmake function and
introduce `add_llvm_component_group` to accurately describe component behavior.

These function store extra properties in the created targets. These properties
are processed once all components are defined to resolve library dependencies
and produce the header expected by llvm-config.

Differential Revision: https://reviews.llvm.org/D90848
 2020-11-13 10:35:24 +01:00
Zi Xuan Wu e1c38dd55d [CSKY 1/n] Add basic stub or infra of csky backend 
This patch introduce files that just enough for lib/Target/CSKY to compile.
Notably a basic CSKYTargetMachine and CSKYTargetInfo.

Differential Revision: https://reviews.llvm.org/D88466
 2020-10-10 10:44:08 +08:00