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<div class="moz-cite-prefix">On 06/28/2017 01:48 PM, Jason wrote:<br>
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<div dir="ltr">Is there any way to provide the inverse? Ie, fast
math enabled by default, but disable rcp using the flags for a
specific div?</div>
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No, but you can enable fast-math flags by default in the IRBuilder
(by calling setFastMathFlags).<br>
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-Hal<br>
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<div class="gmail_quote">On Wed, Jun 28, 2017 at 10:53 AM, Hal
Finkel <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:hfinkel@anl.gov" target="_blank">hfinkel@anl.gov</a>></span>
wrote:<br>
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<p>Hi, Jason,</p>
<p>You shouldn't need to use UsafeFPMath at all now.
Instead, use fast-math flags on the relevant
instructions. See: <a moz-do-not-send="true"
class="m_4738605326428186399moz-txt-link-freetext"
href="http://llvm.org/docs/LangRef.html#fast-math-flags"
target="_blank">http://llvm.org/docs/LangRef.<wbr>html#fast-math-flags</a></p>
<p> -Hal<br>
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<div class="m_4738605326428186399moz-cite-prefix">On
06/28/2017 12:29 PM, Jason via llvm-dev wrote:<br>
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<div dir="ltr">Hi, we generally run our JIT with
UnsafeFPMath enabled, but there are a few specific
instances where a block of code needs to follow
strict FPMath. Is there a way to temporarily
override TargetOptions for a specific block of IR?
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<pre>______________________________<wbr>_________________
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<pre class="m_4738605326428186399moz-signature" cols="72">--
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory</pre>
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<pre class="moz-signature" cols="72">--
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory</pre></body></html>