gcc/testsuite/gcc.dg/torture/builtin-integral-1.c

   1 /* Copyright (C) 2004  Free Software Foundation.
   2
   3    Verify that integral FP expressions are optimized.
   4
   5    Written by Kaveh Ghazi, 2004-03-16.  */
   6
   7 /* { dg-do link } */
   8 /* We need -ffinite-math-only so that we can fold "foo != foo", where
   9    foo is a floating point expression.  We need -fno-math-errno so
  10    that various math functions are marked const/pure and can be
  11    folded.  */
  12 /* { dg-options "-ffinite-math-only -fno-math-errno" } */
  13 /* { dg-require-effective-target c99_runtime } */
  14 /* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
  15
  16 extern int link_failure (int);
  17
  18 /* Test that the various FP truncation builtins detect integral
  19    arguments.  */
  20 #define CHECK_FN(MATHFN) \
  21  if (__builtin_##MATHFN(i1) != i1) link_failure (__LINE__); \
  22  if (__builtin_##MATHFN##f(i1) != i1) link_failure (__LINE__); \
  23  if (__builtin_##MATHFN##l(i1) != i1) link_failure (__LINE__);
  24
  25 #define CHECK_FN_RET(MATHFN, RET) \
  26  if (__builtin_##MATHFN(i1) != (RET)(double)i1) link_failure (__LINE__); \
  27  if (__builtin_##MATHFN##f(i1) != (RET)(float)i1) link_failure (__LINE__); \
  28  if (__builtin_##MATHFN##l(i1) != (RET)(long double)i1) link_failure (__LINE__);
  29
  30   /* Check that various other integral expressions are detected.  */
  31 #define CHECK_EXPR(EXPR,NAME) \
  32  if (__builtin_ceill(EXPR) != (EXPR)) link_failure (__LINE__); \
  33  if (__builtin_lroundl(EXPR) != (long)(long double)(EXPR)) link_failure (__LINE__);
  34
  35 void __attribute__ ((__noinline__)) test (int i1, int i2)
  36 {
  37   CHECK_FN(ceil);
  38   CHECK_FN(floor);
  39   CHECK_FN(nearbyint);
  40   CHECK_FN(rint);
  41   CHECK_FN(round);
  42   CHECK_FN(trunc);
  43   CHECK_FN_RET(lround, long);
  44   CHECK_FN_RET(llround, long long);
  45   CHECK_FN_RET(lrint, long);
  46   CHECK_FN_RET(llrint, long long);
  47   CHECK_FN_RET(lceil, long);
  48   CHECK_FN_RET(llceil, long long);
  49   CHECK_FN_RET(lfloor, long);
  50   CHECK_FN_RET(llfloor, long long);
  51
  52   CHECK_EXPR (5.0, REAL_CST);
  53   CHECK_EXPR (5.0F, REAL_CSTf);
  54   CHECK_EXPR (5.0L, REAL_CSTl);
  55   CHECK_EXPR ((double)i1, FLOAT_EXPR);
  56   CHECK_EXPR ((float)i1, FLOAT_EXPRf);
  57   CHECK_EXPR ((long double)i1, FLOAT_EXPRl);
  58   CHECK_EXPR (__builtin_fabs(i1), ABS_EXPR);
  59   CHECK_EXPR (__builtin_fabsf(i1), ABS_EXPRf);
  60   CHECK_EXPR (__builtin_fabsl(i1), ABS_EXPRl);
  61   CHECK_EXPR (((void)i1,(double)i2), COMPOUND_EXPR);
  62   CHECK_EXPR ((double)i1+i2, PLUS_EXPR);
  63   CHECK_EXPR ((double)i1-i2, MINUS_EXPR);
  64   CHECK_EXPR ((double)i1*i2, MULT_EXPR);
  65 }
  66
  67 int main (void)
  68 {
  69   test (1, 2);
  70   return 0;
  71 }