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comparison gcc/testsuite/gcc.dg/sibcall-3.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* Simple check that sibling calls are performed from a
2 void non-leaf-function taking one int argument calling a function which
3 is about the same as itself.
4
5 Copyright (C) 2002 Free Software Foundation Inc.
6 Contributed by Hans-Peter Nilsson <hp@bitrange.com> */
7
8 /* { dg-do run { xfail { { cris-*-* crisv32-*-* h8300-*-* hppa*64*-*-* m32r-*-* mcore-*-* mn10300-*-* msp430*-*-* nds32*-*-* xstormy16-*-* v850*-*-* vax-*-* xtensa*-*-* } || { arm*-*-* && { ! arm32 } } } } } */
9 /* -mlongcall disables sibcall patterns. */
10 /* { dg-skip-if "" { powerpc*-*-* } { "-mlongcall" } { "" } } */
11 /* { dg-options "-O2 -foptimize-sibling-calls" } */
12
13 /* The option -foptimize-sibling-calls is the default, but serves as
14 marker. This test is xfailed on targets without sibcall patterns
15 (except targets where the test does not work due to the return address
16 not saved on the regular stack). */
17
18 extern void abort (void);
19 extern void exit (int);
20
21 /* Sibcalls are not supported in MIPS16 mode, which has direct calls but
22 not direct jumps. */
23 #ifdef __mips
24 #define ATTR __attribute__((nomips16))
25 #else
26 #define ATTR
27 #endif
28
29 static ATTR void recurser_void1 (int);
30 static ATTR void recurser_void2 (int);
31 extern void track (int);
32
33 int main ()
34 {
35 recurser_void1 (0);
36 exit (0);
37 }
38
39 /* The functions should get the same stack-frame, and best way to make it
40 reasonably sure is to make them have the same contents (regarding the
41 n tests). */
42
43 static void __attribute__((noinline)) ATTR
44 recurser_void1 (int n)
45 {
46 if (n == 0 || n == 7 || n == 8)
47 track (n);
48
49 if (n == 10)
50 return;
51
52 recurser_void2 (n + 1);
53 }
54
55 static void __attribute__((noinline)) ATTR
56 recurser_void2 (int n)
57 {
58 if (n == 0 || n == 7 || n == 8)
59 track (n);
60
61 if (n == 10)
62 return;
63
64 recurser_void1 (n + 1);
65 }
66
67 void *trackpoint;
68
69 void __attribute__ ((noinline))
70 track (int n)
71 {
72 char stackpos[1];
73
74 if (n == 0)
75 trackpoint = stackpos;
76 else if ((n != 7 && n != 8) || trackpoint != stackpos)
77 abort ();
78 }