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Fix __builtin_constant_p(1000/x)

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was incorrectly treated as constant because the vpop removed
all traces of non-constness.
This commit is contained in:
Michael Matz
2016-09-03 23:23:13 +02:00
parent 5bd8aeb917
commit 49bb5a7e06
2 changed files with 27 additions and 0 deletions
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10
tests/tcctest.c
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@ -1082,6 +1082,14 @@ static int toupper1(int a)
return TOUPPER(a);
}
static unsigned int calc_vm_flags(unsigned int prot)
{
unsigned int prot_bits;
/* This used to segfault in some revisions: */
prot_bits = ((0x1==0x00000001)?(prot&0x1):(prot&0x1)?0x00000001:0);
return prot_bits;
}
void bool_test()
{
int *s, a, b, t, f, i;
@ -1154,6 +1162,7 @@ void bool_test()
if (toupper1 (i) != TOUPPER (i))
printf("error %d\n", i);
}
printf ("bits = 0x%x\n", calc_vm_flags (0x1));
}
/* GCC accepts that */
@ -2880,6 +2889,7 @@ void builtin_test(void)
#endif
printf("res = %d\n", __builtin_constant_p(1));
printf("res = %d\n", __builtin_constant_p(1 + 2));
printf("res = %d\n", __builtin_constant_p(&constant_p_var));
printf("res = %d\n", __builtin_constant_p(constant_p_var));
printf("res = %d\n", __builtin_constant_p(100000 / constant_p_var));
s = 1;