clang/test/CodeGen/builtin-nan-exception.c

   1 // RUN: %clang -target aarch64 -emit-llvm -S %s -o - | FileCheck %s
   2 // RUN: %clang -target lanai -emit-llvm -S %s -o - | FileCheck %s
   3 // RUN: %clang -target riscv64 -emit-llvm -S %s -o - | FileCheck %s
   4 // RUN: %clang -target x86_64 -emit-llvm -S %s -o - | FileCheck %s
   5
   6 // Run a variety of targets to ensure there's no target-based difference.
   7
   8 // An SNaN with no payload is formed by setting the bit after the
   9 // the quiet bit (MSB of the significand).
  10
  11 // CHECK: float 0x7FF8000000000000, float 0x7FF4000000000000
  12
  13 float f[] = {
  14   __builtin_nanf(""),
  15   __builtin_nansf(""),
  16 };
  17
  18
  19 // Doubles are created and converted to floats.
  20 // Converting (truncating) to float quiets the NaN (sets the MSB
  21 // of the significand) and raises the APFloat invalidOp exception
  22 // but that should not cause a compilation error in the default
  23 // (ignore FP exceptions) mode.
  24
  25 // CHECK: float 0x7FF8000000000000, float 0x7FFC000000000000
  26
  27 float converted_to_float[] = {
  28   __builtin_nan(""),
  29   __builtin_nans(""),
  30 };
  31
  32 // CHECK: double 0x7FF8000000000000, double 0x7FF4000000000000
  33
  34 double d[] = {
  35   __builtin_nan(""),
  36   __builtin_nans(""),
  37 };