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| author | Antonio Frighetto <me@antoniofrighetto.com> | 2025-07-18 10:59:42 +0200 |
|---|---|---|
| committer | Antonio Frighetto <me@antoniofrighetto.com> | 2025-07-18 11:50:18 +0200 |
| commit | 9e0c06d708a40bb3c8bd08acd982836cce718135 (patch) | |
| tree | 762c09774df448985d706cf9be7d9e6e37a82c44 /clang/lib/CodeGen/CodeGenModule.cpp | |
| parent | ee8756e8551bc9ae5bf60e1ff16abaa95d61c234 (diff) | |
| download | llvm-9e0c06d708a40bb3c8bd08acd982836cce718135.zip llvm-9e0c06d708a40bb3c8bd08acd982836cce718135.tar.gz llvm-9e0c06d708a40bb3c8bd08acd982836cce718135.tar.bz2 | |
[clang][CodeGen] Set `dead_on_return` when passing arguments indirectly
Let Clang emit `dead_on_return` attribute on pointer arguments
that are passed indirectly, namely, large aggregates that the
ABI mandates be passed by value; thus, the parameter is destroyed
within the callee. Writes to such arguments are not observable by
the caller after the callee returns.
This should desirably enable further MemCpyOpt/DSE optimizations.
Previous discussion: https://discourse.llvm.org/t/rfc-add-dead-on-return-attribute/86871.
Diffstat (limited to 'clang/lib/CodeGen/CodeGenModule.cpp')
0 files changed, 0 insertions, 0 deletions