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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang-cl is generating call to non-existing lib function for win32 with /fp:except option"
href="https://bugs.llvm.org/show_bug.cgi?id=44394">44394</a>
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<th>Summary</th>
<td>clang-cl is generating call to non-existing lib function for win32 with /fp:except option
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>LLVM Codegen
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>zamazan4ik@tut.by
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>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).</pre>
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