[PATCH] D24925: [testsuite] turn fp-contract off for ARM because output checking is not flexible enough

Stephen Canon via llvm-commits llvm-commits at lists.llvm.org
Mon Sep 26 12:14:21 PDT 2016


> On Sep 26, 2016, at 3:11 PM, Renato Golin <renato.golin at linaro.org> wrote:
> 
> In the past, I have fixed problems like this by implementing algorithms by hand (like sin/cos) to make sure the behaviour is known and doesn't heavily rely on system/libc/choices. We'll probably have to do the same here, and I'm surprised that no one is trying to understand the breakage, but work around it.

We understand the breakage perfectly well.  I don’t know why you’re claiming otherwise.  As I offered previously, if someone has time/interest in tackling this (and is able to run the test suite) I’ll be delighted to help them implement numerically sound error bounds for these tests.
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