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| author | Fangrui Song <i@maskray.me> | 2024-04-26 08:30:27 -0700 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2024-04-26 08:30:27 -0700 |
| commit | bf67610a8ac07ec143f243f129eecd456aa63383 (patch) | |
| tree | e392ca341d19d67ea25f2c068565230daaec9397 /clang/lib/Frontend/InitPreprocessor.cpp | |
| parent | 571831a680faa9615183f855fddf43fd1a9ba192 (diff) | |
| download | llvm-bf67610a8ac07ec143f243f129eecd456aa63383.zip llvm-bf67610a8ac07ec143f243f129eecd456aa63383.tar.gz llvm-bf67610a8ac07ec143f243f129eecd456aa63383.tar.bz2 | |
[MC] Rename temporary symbols of empty name to ".L0 " (#89693)
Temporary symbols generated for .eh_frame and .debug_line have an empty
name, which appear in .symtab in the presence of RISC-V style linker
relaxation and will not be discarded by ld/objcopy --discard-locals
(-X).
In contrast, GNU assembler's riscv port assigns a fake name ".L0 " (with
a trailing space) to these symbols so that will be discarded by
ld/objcopy --discard-locals.
This patch matches the GNU behavior. Since Clang's RISC-V targets pass
-X to ld, and GNU ld defaults to -X for RISC-V targets, these ".L0 "
symbols will be discarded after linking by default, as expected by
users.
The llvm-symbolizer special case for RISC-V `SF_FormatSpecific` symbols
https://reviews.llvm.org/D98669 needs to be adjusted.
Note: `"":` in assembly currently crashes.
Note: bolt tests used /usr/bin/clang before
llvmorg-19-init-9532-g59bfc3106874.
The revert llvmorg-19-init-9531-g28b55342e1a8 actually broke
bolt/test/RISCV/fake-label-no-entry.c
Diffstat (limited to 'clang/lib/Frontend/InitPreprocessor.cpp')
0 files changed, 0 insertions, 0 deletions