1 // RUN: %clang -target mipsel-unknown-linux -mnan=legacy -emit-llvm -S %s -o - | FileCheck %s 2 // CHECK: float 0x7FFC000000000000, float 0x7FF8000000000000 3 // CHECK: double 0x7FF4000000000000, double 0x7FF8000000000000 4 5 // The first line shows an unintended consequence. 6 // __builtin_nan() creates a legacy QNAN double with an empty payload 7 // (the first bit of the significand is clear to indicate quiet, so 8 // the second bit of the payload is set to maintain NAN-ness). 9 // The value is then truncated, but llvm::APFloat does not know about 10 // the inverted quiet bit, so it sets the first bit on conversion 11 // to indicate 'quiet' independently of the setting in clang. 12 13 float f[] = { 14 __builtin_nan(""), 15 __builtin_nans(""), 16 }; 17 18 double d[] = { 19 __builtin_nan(""), 20 __builtin_nans(""), 21 }; 22