dse-1.c

用于进行gcc测试

/* ??? Further to the subreg comment below, we can't rely on any of the
   tests passing unless we handle subregs, and the patch to do so has
   been rejected for the time being.  */
/* { dg-do compile { target { ! *-*-* } } } */
/* { dg-mips-options "-mgp64 -O" } */

#define TEST(ID, TYPE1, TYPE2)					\
  union u##ID {							\
    TYPE1 m1[sizeof (TYPE2) / sizeof (TYPE1)];			\
    TYPE2 m2;							\
  };								\
								\
  /* The MIPS16 versions of the shifts we need are too		\
     expensive.  */						\
  TYPE1 __attribute__((nomips16))				\
  f##ID (TYPE2 x, union u##ID *u)				\
  {								\
    u->m2 = x;							\
    return (u->m1[0]						\
	    + u->m1[sizeof (TYPE2) / sizeof (TYPE1) - 1]);	\
  }

TEST (1, unsigned int, unsigned long long);
TEST (2, int, long long);
TEST (3, unsigned short, unsigned long long);
TEST (4, short, long long);
TEST (5, unsigned char, unsigned long long);
TEST (6, signed char, long long);

TEST (7, unsigned short, unsigned int);
TEST (8, short, int);
TEST (9, unsigned char, unsigned int);
TEST (10, signed char, int);

/* DSE isn't yet read to consider stores of subregs, so the corresponding
   (char, short) tests won't pass.  */

/* { dg-final { scan-assembler-not "\tlh\t" } } */
/* { dg-final { scan-assembler-not "\tlhu\t" } } */
/* { dg-final { scan-assembler-not "\tlw\t" } } */
/* { dg-final { scan-assembler-not "\tlwu\t" } } */
/* { dg-final { scan-assembler-not "\tlb\t" } } */
/* { dg-final { scan-assembler-not "\tlbu\t" } } */