[PATCH] D106959: [PowerPC] swdiv builtins for XL compatibility

[Eli Friedman via Phabricator via cfe-commits]

efriedma added inline comments.


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Comment at: llvm/test/CodeGen/PowerPC/LowerCheckedFPArith.ll:36
+; CHECK-NEXT:  %2 = fdiv fast float %0, %1
+; CHECK-NEXT:  %3 = fcmp une float %2, %2
+; CHECK-NEXT:  br i1 %3, label %swdiv_HWDIV, label %swdiv_MERGE
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A "fast" fdiv never produces NaN, per LangRef.  Using fcmp like this is fragile at best.

(Maybe you want "fdiv arcp"?)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D106959/new/

https://reviews.llvm.org/D106959