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N_FUNC_COLD is a new MachO symbol attribute. It's a hint to the linker to order a symbol towards the end of its section, to improve locality. Example: ``` void a1() {} __attribute__((cold)) void a2() {} void a3() {} int main() { a1(); a2(); a3(); return 0; } ``` A linker that supports N_FUNC_COLD will order _a2 to the end of the text section. From `nm -njU` output, we see: ``` _a1 _a3 _main _a2 ``` Differential Revision: https://reviews.llvm.org/D57190 llvm-svn: 352227
14 lines
362 B
ArmAsm
14 lines
362 B
ArmAsm
// RUN: llvm-mc -triple aarch64-apple-ios -o - -filetype=obj %s | \
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// RUN: llvm-readobj -symbols | FileCheck %s -check-prefix=READOBJ
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// READOBJ-LABEL: Name: cold_func
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// READOBJ-NEXT: Type: Section
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// READOBJ-NEXT: Section: __text
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// READOBJ-NEXT: RefType: UndefinedNonLazy (0x0)
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// READOBJ-NEXT: Flags [ (0x400)
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.text
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.cold cold_func
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cold_func:
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ret
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