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</o:shapelayout></xml><![endif]--></head><body lang=EN-IE link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>I am seeing failures in two tests after migrating to v5.0 final, these are:<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New";color:black'>std/language.support/support.limits/limits/numeric.limits.members/quiet_NaN.pass.cpp</span><span style='font-size:12.0pt;font-family:"Courier New"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>and:<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New";color:black'>std/language.support/support.limits/limits/numeric.limits.members/signaling_NaN.pass.cpp</span><span style='font-size:12.0pt;font-family:"Courier New"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>However, these are new tests and it turns out that the underlying problem is that the builtin ‘</span><span style='font-size:12.0pt;font-family:"Courier New"'>__builtin_nanl(“”)</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ is returning the value </span><span style='font-size:12.0pt;font-family:"Courier New"'>0x0000000000000000</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>. I tested this builtin with our v4.0 compiler and it has the same problem, so this is not a regression but rather an existing bug exposed by the new LibC++ implementation of ‘</span><span style='font-size:12.0pt;font-family:"Courier New"'><limits></span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>But our implementation of FP64 is a software only implementation using the FP64 support functions in ‘</span><span style='font-size:12.0pt;font-family:"Courier New"'>compiler-rt</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ and we have no lowering actions of our own.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>Where should I be looking to find out how to fix this? Is it a CLang issue of an LLVM issue?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'> MartinO<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p></div></body></html>