1 /* { dg-do compile } */
2 /* { dg-options "-O2 -fipa-ra -fomit-frame-pointer -fno-optimize-sibling-calls" } */
3 /* { dg-additional-options "-mregparm=1" { target ia32 } } */
4
5 /* Test -fipa-ra optimization on self-recursive function. */
6
7 static int __attribute__((noinline))
bar(int x)8 bar (int x)
9 {
10 if (x > 4)
11 return bar (x - 3);
12 return 0;
13 }
14
15 int __attribute__((noinline))
foo(int y)16 foo (int y)
17 {
18 return y + bar (y);
19 }
20
21 /* Check that no registers are saved/restored. */
22 /* { dg-final { scan-assembler-not "push" } } */
23 /* { dg-final { scan-assembler-not "pop" } } */
24
25 /* Check that addition uses dx. */
26 /* { dg-final { scan-assembler-times "addl\t%\[re\]?dx, %\[re\]?ax" 1 } } */
27
28 /* Verify that bar is self-recursive. */
29 /* { dg-final { scan-assembler-times "call\t_?bar" 2 } } */
30