22 lines · c
1// RUN: %clang -target mipsel-unknown-linux -mnan=legacy -emit-llvm -S %s -o - | FileCheck %s2// CHECK: float 0x7FFC000000000000, float 0x7FF80000000000003// CHECK: double 0x7FF4000000000000, double 0x7FF80000000000004 5// The first line shows an unintended consequence.6// __builtin_nan() creates a legacy QNAN double with an empty payload7// (the first bit of the significand is clear to indicate quiet, so8// the second bit of the payload is set to maintain NAN-ness).9// The value is then truncated, but llvm::APFloat does not know about10// the inverted quiet bit, so it sets the first bit on conversion11// to indicate 'quiet' independently of the setting in clang.12 13float f[] = {14 __builtin_nan(""),15 __builtin_nans(""),16};17 18double d[] = {19 __builtin_nan(""),20 __builtin_nans(""),21};22