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| author | Eli Friedman <eli.friedman@gmail.com> | 2008-05-26 12:59:39 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2008-05-26 12:59:39 +0000 |
| commit | 0c99509927a0c7a48490486b9fec287b63e5c09c (patch) | |
| tree | 62ff858a189b69f2f239fbd5eca722a525ebd0b7 /test/Sema/typedef-variable-type.c | |
| parent | 1849128c7d88247d914f05efe4c03907f0932174 (diff) | |
Emit memmove, not memcpy, for structure copies; this is unfortunately
required for correctness in cases of copying a struct to itself or to
an overlapping struct (itself for cases like *a = *a, and overlapping
is possible with unions).
Hopefully, this won't end up being a perf issue; LLVM *should* be able
to optimize memmove to memcpy in a lot of cases, and for small copies
the generated code *should* be mostly comparable. (In reality, LLVM
is currently horrible at optimizing memmove, but that's a bug, not a
fundamental issue.)
gcc currently generates wrong code; that's
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32667.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51566 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Sema/typedef-variable-type.c')
0 files changed, 0 insertions, 0 deletions