LLVM支持哪些ARM体系结构？

Question

我研究用C语言编写的软件,该软件运行在具有不同体系结构的各种ARM处理器上(主要是ARMv5,ARMv6).我们目前使用几个不同版本的RVDS编译我们的代码,但我们正在考虑使用LLVM编译一些代码以添加一些自定义检测.

我知道LLVM有ARM和Thumb目标,但它支持哪些架构？LLVM生成的代码是否可以在ARMv5上运行？我应该注意哪些限制？

Answer 1

他们的源代码列出了以下archs:

// ARM architectures.
def ArchV4T     : SubtargetFeature<"v4t",  "ARMArchVersion", "V4T",  "ARM v4T">;
def ArchV5T     : SubtargetFeature<"v5t",  "ARMArchVersion", "V5T",  "ARM v5T">;
def ArchV5TE    : SubtargetFeature<"v5te", "ARMArchVersion", "V5TE", "ARM v5TE, v5TEj, v5TExp">;
def ArchV6      : SubtargetFeature<"v6",   "ARMArchVersion", "V6",   "ARM v6">;
def ArchV6M     : SubtargetFeature<"v6m",  "ARMArchVersion", "V6M",  "ARM v6m",  [FeatureNoARM, FeatureDB]>;
def ArchV6T2    : SubtargetFeature<"v6t2", "ARMArchVersion", "V6T2", "ARM v6t2", [FeatureThumb2]>;
def ArchV7A     : SubtargetFeature<"v7a",  "ARMArchVersion", "V7A",  "ARM v7A",  [FeatureThumb2, FeatureNEON, FeatureDB]>;
def ArchV7M     : SubtargetFeature<"v7m",  "ARMArchVersion", "V7M",  "ARM v7M",  [FeatureThumb2, FeatureNoARM, FeatureDB, FeatureHWDiv]>;