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| author | dweiller <4678790+dweiller@users.noreply.github.com> | 2025-02-11 15:01:35 +1100 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2025-02-11 17:40:20 -0800 |
| commit | 6dc1a4db7f9561dd2b84a99159b3ad7b55958717 (patch) | |
| tree | dec4044e1316dcffba1d1a2b346f307e89dd8d62 /src/codegen | |
| parent | c2a3d8cbb935ae68a5bd95d45c65b0f7f32974b0 (diff) | |
| download | zig-6dc1a4db7f9561dd2b84a99159b3ad7b55958717.tar.gz zig-6dc1a4db7f9561dd2b84a99159b3ad7b55958717.zip | |
compiler-rt: fix memcpy generating recursive calls
When using the LLVM backend, array copies were lowered as calls to
`llvm.memcpy.*` builtin which could cause recursive calls to memcpy to
be generated (observed with `-target x86_64-linux -mcpu x86_64+avx512vl
--debug-rt`).
By instead performing these small fixed-size copies with integers or
vectors the LLVM backend does not generate calls to the `llvm.memcpy`
builtin, and so (with `-fno-builtin`) recursive calls to memcpy will
not be generated by LLVM.
The assertions and (test build) runtime safety have been removed as they
may cause (mutually) recursive calls to memcpy in debug builds since the
panic handler generates calls to llvm.memcpy.
Diffstat (limited to 'src/codegen')
0 files changed, 0 insertions, 0 deletions