23 lines
689 B
C
23 lines
689 B
C
/* { dg-do compile { target powerpc*-*-* } } */
|
|
/* { dg-options "-O2" } */
|
|
/* { dg-final { scan-assembler {#before\M.*\mmflr\M} } } */
|
|
|
|
/* This tests if shrink-wrapping for separate components works.
|
|
|
|
r20 (a callee-saved register) is forced live at the start, so that we
|
|
get it saved in a prologue at the start of the function.
|
|
The link register only needs to be saved if x is non-zero; without
|
|
separate shrink-wrapping it would however be saved in the one prologue.
|
|
The test tests if the mflr insn ends up behind the prologue. */
|
|
|
|
void g(void);
|
|
|
|
void f(int x)
|
|
{
|
|
register int r20 asm("20") = x;
|
|
asm("#before" : : "r"(r20));
|
|
if (x)
|
|
g();
|
|
asm(""); // no tailcall of g
|
|
}
|