gcc/testsuite/gcc.dg/debug/dwarf2/dwarf-float.c

/* Verify the DWARF encoding of C99 floating point types.  */

/* { dg-do compile } */
/* { dg-options "-O0 -gdwarf-4 -dA" } */
/* { dg-final { scan-assembler "0x4\[^\\r\\n]*DW_AT_encoding" } } */
/* { dg-final { scan-assembler "0x4\[^\\r\\n]*DW_AT_byte_size" } } */
/* { dg-final { scan-assembler "0x8\[^\\r\\n]*DW_AT_byte_size" { target double64 } } } */
/* { dg-final { scan-assembler "0x10\[^\\r\\n]*DW_AT_byte_size" { target longdouble128 }} } */

void foo ()
{
  float f = 1.5f;
  double d = 1.5;
  long double l = 1.5l;
}