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comparison gcc/testsuite/gcc.dg/sibcall-10.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 /* Simple check that sibling calls are performed from a
2 void non-leaf-function taking no arguments 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 /* -msave-restore disables sibcall patterns. */
12 /* { dg-skip-if "" { riscv*-*-* } { "-msave-restore" } { "" } } */
13 /* { dg-options "-O2 -foptimize-sibling-calls" } */
14
15 /* The option -foptimize-sibling-calls is the default, but serves as
16 marker. This test is xfailed on targets without sibcall patterns
17 (except targets where the test does not work due to the return address
18 not saved on the regular stack). */
19
20 extern void abort (void);
21 extern void exit (int);
22
23 /* Sibcalls are not supported in MIPS16 mode, which has direct calls but
24 not direct jumps. */
25 #ifdef __mips
26 #define ATTR __attribute__((nomips16))
27 #else
28 #define ATTR
29 #endif
30
31 static ATTR void recurser_void1 (void);
32 static ATTR void recurser_void2 (void);
33 extern void track (void);
34 volatile int v;
35
36 int n = 0;
37 int main ()
38 {
39 recurser_void1 ();
40 if (v != 5)
41 abort ();
42 exit (0);
43 }
44
45 /* The functions should get the same stack-frame, and best way to make it
46 reasonably sure is to make them have the same contents (regarding the
47 n tests). */
48
49 static void __attribute__((noinline)) ATTR
50 recurser_void1 (void)
51 {
52 if (n == 0 || n == 7 || n == 8)
53 track ();
54
55 if (n == 10)
56 return;
57 n++;
58 recurser_void2 ();
59 }
60
61 static void __attribute__((noinline)) ATTR
62 recurser_void2 (void)
63 {
64 if (n == 0 || n == 7 || n == 8)
65 track ();
66
67 if (n == 10)
68 return;
69 n++;
70 v++;
71 recurser_void1 ();
72 }
73
74 void *trackpoint;
75
76 void __attribute__ ((noinline))
77 track ()
78 {
79 char stackpos[1];
80
81 if (n == 0)
82 trackpoint = stackpos;
83 else if ((n != 7 && n != 8) || trackpoint != stackpos)
84 abort ();
85 }