You can sign up for an account by emailing the admin account. On Thu, Dec 26, 2019, 5:04 PM Anton Yudintsev via Phabricator < revi...@reviews.llvm.org> wrote:
> AntonYudintsev added a comment. > > I have found bug in clang-cl (win32 clang), related to recent inroduction > of ffp-exception-behavior. > Unfortunately, I don't have a working patch yet, and since LLVM bugtracker > registration is closed, I can not even submit a bug. > > So, if it is not a trouble for you, I will email the bug description here. > > Please let me know if it isn't appropriate. Bug description: > ============================================================ > > Windows: clang-cl is generating call to non-existing lib function for > win32 with /fp:except option. > With recent ffp-exception-behavior=maytrap/strict, fp:except in clang-cl > became generate FPE aware code. > > But in case of floorf and ceilf it generates call to non-existing library > function. > > clang-cl.exe -m32 /Ox /fp:except testFloor.cpp /FA > testFloor.cpp: > > #include <math.h> > float ret(float v) { return floorf(v); } > > resulting assember: > > push eax > movss xmm0, dword ptr [esp + 8] > movss dword ptr [esp], xmm0 > call _floorf #no such function!!! > pop eax > ret > > Expected behaviour: > > there is no floorf lib function. Like with cosf and other math functions, > floorf in MSVC is implemented as inline function. > > So, it should be call to _floor (with apropriate conversion first). > > > Repository: > rG LLVM Github Monorepo > > CHANGES SINCE LAST ACTION > https://reviews.llvm.org/D62731/new/ > > https://reviews.llvm.org/D62731 > > > >
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