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[libunwind] Clean up __arm64__

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`__aarch64__` is defined for the target (since the beginning of arm64 support: clang 3.5).
`__arm64__` is only defined for the Darwin OS on AArch64.

`defined(__aarch64__) || defined(__arm64__)` can be simplied as `defined(__aarch64__)`

Darwin AArch64 uses %% as the assembly separator (see AArch64MCAsmInfo.cpp).
Make the intention explicit in src/assembly.h

With this change, the libunwind code base has no reference of `__arm64__`/`__arm64`.

Reviewed By: #libunwind, ldionne, mstorsjo

Differential Revision: https://reviews.llvm.org/D77829
This commit is contained in:
Fangrui Song 2020-04-09 14:09:43 -07:00
parent a79b2fc44b
commit f3d460ce58
5 changed files with 5 additions and 5 deletions
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2
libunwind/src/UnwindRegistersRestore.S
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@ -557,7 +557,7 @@ Lnovec:
lwz %r3, 20(%r3) // do r3 last
bctr
#elif defined(__arm64__) || defined(__aarch64__)
#elif defined(__aarch64__)
//
// void libunwind::Registers_arm64::jumpto()

2
libunwind/src/UnwindRegistersSave.S
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@ -697,7 +697,7 @@ DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
blr
#elif defined(__arm64__) || defined(__aarch64__)
#elif defined(__aarch64__)
//
// extern int __unw_getcontext(unw_context_t* thread_state)

2
libunwind/src/Unwind_AppleExtras.cpp
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@ -56,7 +56,7 @@ struct libgcc_object_info {
__attribute__((visibility("default"))) const char sym##_tmp42 = 0; \
extern const char sym##_tmp43 __asm("$ld$hide$os4.3$_" #sym ); \
__attribute__((visibility("default"))) const char sym##_tmp43 = 0;
#elif defined(__arm64__)
#elif defined(__aarch64__)
#define NOT_HERE_BEFORE_10_6(sym)
#define NEVER_HERE(sym)
#else

2
libunwind/src/assembly.h
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@ -28,7 +28,7 @@
#ifdef _ARCH_PWR8
#define PPC64_HAS_VMX
#endif
#elif defined(__arm64__)
#elif defined(__APPLE__) && defined(__aarch64__)
#define SEPARATOR %%
#else
#define SEPARATOR ;

2
libunwind/src/config.h
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@ -102,7 +102,7 @@
#if defined(__i386__) || defined(__x86_64__) || \
defined(__ppc__) || defined(__ppc64__) || defined(__powerpc64__) || \
(!defined(__APPLE__) && defined(__arm__)) || \
(defined(__arm64__) || defined(__aarch64__)) || \
defined(__aarch64__) || \
defined(__mips__) || \
defined(__riscv)
#if !defined(_LIBUNWIND_BUILD_SJLJ_APIS)