Viewing file:  pr19683-1.c (1.07 KB) -rw-r--r--
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/* From PR rtl-optimization/19683. On little-endian MIPS targets,
reload would incorrectly inherit the high part of the multiplication
result. */
/* { dg-do run { target mips*-*-* } } */
extern void abort (void);
extern void exit (int);
#define REPEAT10(X, Y) \
X(Y##0); X(Y##1); X(Y##2); X(Y##3); X(Y##4); \
X(Y##5); X(Y##6); X(Y##7); X(Y##8); X(Y##9)
#define REPEAT30(X) REPEAT10 (X, 0); REPEAT10 (X, 1); REPEAT10 (X, 2)
#define IN(X) unsigned int x##X = ptr[0]
#define OUT(X) ptr[0] = x##X
#if __mips_isa_rev <= 5
union u { unsigned long long ll; unsigned int i[2]; };
unsigned int __attribute__ ((nomips16))
foo (volatile unsigned int *ptr)
{
union u u;
int result;
u.ll = (unsigned long long) ptr[0] * ptr[0];
REPEAT30 (IN);
REPEAT30 (OUT);
asm ("#" : "=l" (result) : "l" (u.i[1]));
return result;
}
#endif
int __attribute__ ((nomips16))
main (void)
{
#if __mips_isa_rev <= 5
unsigned int array[] = { 1000 * 1000 * 1000 };
union u u;
u.ll = (unsigned long long) array[0] * array[0];
if (foo (array) != u.i[1])
abort ();
#endif
exit (0);
}
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