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Groups > linux.kernel > #1603255
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 5/7] x86, boot, LLVM: Use regparm=0 for memcpy and memset |
| Date | 2017-03-17 13:20 +0100 |
| Message-ID | <tlZ1o-6iZ-33@gated-at.bofh.it> (permalink) |
| References | <tlNWh-6eK-9@gated-at.bofh.it> <tlNWh-6eK-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Mar 16, 2017 at 05:15:18PM -0700, Michael Davidson wrote: > Use the standard regparm=0 calling convention for memcpy and > memset when building with clang. > > This is a work around for a long standing clang bug > (see https://llvm.org/bugs/show_bug.cgi?id=3997) where > clang always uses the standard regparm=0 calling convention > for any implcit calls to memcpy and memset that it generates > (eg for structure assignments and initialization) even if an > alternate calling convention such as regparm=3 has been specified. Seriously, fix LLVM already.
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[PATCH 5/7] x86, boot, LLVM: Use regparm=0 for memcpy and memset Michael Davidson <md@google.com> - 2017-03-17 01:30 +0100 Re: [PATCH 5/7] x86, boot, LLVM: Use regparm=0 for memcpy and memset Peter Zijlstra <peterz@infradead.org> - 2017-03-17 13:20 +0100
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