[PATCH] D69982: PPC: Prepare tests for switch of default denormal-fp-math

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D69982#1746873 <https://reviews.llvm.org/D69982#1746873>, @steven.zhang wrote:

> Well, it seems that it is still too early to review this change. One comments: I see that, we have the code sequence change if switch to ieee. sqrt_afn_ieee is slower than sqrt_afn.  As you are trying to set it as ieee for target that didn't explicit set the denormal-fp-math, which means that, this will affect PowerPC. Could we have the Frontend set the denormal-fp-math for PowerPC as non-ieee, so that, you don't need this patch any more ?


Based on the comments in bug 34994, the current behavior is broken on PowerPC. Denormals are enabled by default, so the sqrt expansion is broken. It would be incorrect to default to non-ieee


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https://reviews.llvm.org/D69982