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| author | Duncan Sands <baldrick@free.fr> | 2010-11-05 15:20:29 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2010-11-05 15:20:29 +0000 |
| commit | 6c25ca4f2bff3bd7569170e209dc22ec9ba01361 (patch) | |
| tree | 2a98fe91d5f4cef921fa73be47ba2884c33aa200 /clang/test/SemaCXX/nullptr.cpp | |
| parent | b7383e6d80af774880784587b0e7d7edceb4b295 (diff) | |
| download | bcm5719-llvm-6c25ca4f2bff3bd7569170e209dc22ec9ba01361.tar.gz bcm5719-llvm-6c25ca4f2bff3bd7569170e209dc22ec9ba01361.zip | |
When passing a parameter using the 'byval' mechanism, inline code needs to be used
to perform the copy, which may be of lots of memory [*]. It would be good if the
fall-back code generated something reasonable, i.e. did the copy in a loop, rather
than vast numbers of loads and stores. Add a note about this. Currently target
specific code seems to always kick in so this is more of a theoretical issue rather
than a practical one now that X86 has been fixed.
[*] It's amazing how often people pass mega-byte long arrays by copy...
llvm-svn: 118275
Diffstat (limited to 'clang/test/SemaCXX/nullptr.cpp')
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