35 lines
1.3 KiB
C
35 lines
1.3 KiB
C
/* Produce code-dense instructions and the assembler must *
|
|
* be okay with it. An example would be: *
|
|
* *
|
|
* sub_s r3, r1, r3 *
|
|
* *
|
|
* While generally for _short instructions_ , it is not *
|
|
* allowed to have different registers as the first and *
|
|
* second operands, the code-dense mode allows it. *
|
|
* This test is about the fact that if "-mcode-density" is *
|
|
* passed to gcc driver as the flag, "as" must receive it *
|
|
* as well, else it is going to choke on such encodings. */
|
|
|
|
/* { dg-do assemble } */
|
|
/* { dg-skip-if "" { ! { clmcpu } } } */
|
|
/* { dg-options "-mcpu=em_mini -mcode-density" } */
|
|
|
|
typedef long long uint64_t;
|
|
|
|
uint64_t f1(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
void f2(void)
|
|
{
|
|
uint64_t start_us = 0;
|
|
while ((f1() - start_us) < 2);
|
|
}
|
|
|
|
/* This is a tricky check, because it hardcodes register *
|
|
* numbers. Nevertheless, it is easier than coming up with *
|
|
* a regular expression that the first two operands should *
|
|
* not be the same. */
|
|
/* { dg-final { scan-assembler "sub_s\\s+r3,r1,r3" } } */
|