[PATCH] D95948: Stop traping on sNaN in __builtin_isnan

[Thomas Preud'homme via Phabricator via llvm-commits]

thopre created this revision.
thopre added reviewers: efriedma, kpn, mibintc, sepavloff, rjmccall.
Herald added subscribers: dexonsmith, pengfei.
thopre requested review of this revision.
Herald added projects: clang, LLVM.
Herald added a subscriber: llvm-commits.

__builtin_isnan currently generates a floating-point compare operation
which triggers a trap when faced with a signaling NaN in StrictFP mode.
This commit uses integer operations instead to not generate any trap in
such a case.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D95948

Files:
  clang/lib/CodeGen/CGBuiltin.cpp
  clang/test/CodeGen/X86/strictfp_builtins.c
  clang/test/CodeGen/strictfp_builtins.c
  clang/test/CodeGen/strictfp_fpclassify.c
  llvm/include/llvm/ADT/APFloat.h
  llvm/include/llvm/IR/Type.h

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