gcc/testsuite/gcc.dg/Wfree-nonheap-object-4.c

   1 /* PR middle-end/98664 - inconsistent --Wfree-nonheap-object for inlined
   2    calls to system headers
   3    { dg-do compile }
   4    { dg-options "-O2 -Wall" } */
   5
   6 # 7 "Wfree-nonheap-object-4.h" 1 3
   7
   8 struct A
   9 {
  10   void *p;
  11 };
  12
  13 void f0 (struct A *p, void *q) { p->p = q; }
  14 void f1 (struct A *p, void *q) { f0 (p, q); }
  15 void f2 (struct A *p, void *q) { f1 (p, q); }
  16
  17 void g0 (struct A *p)
  18 {
  19   __builtin_free (p->p);      // { dg-warning "\\\[-Wfree-nonheap-object" }
  20 }
  21
  22 void g1 (struct A *p) { g0 (p); }
  23 void g2 (struct A *p) { g1 (p); }
  24
  25 # 26 "Wfree-nonheap-object-4.c"
  26
  27 #define NOIPA __attribute__ ((noipa))
  28
  29 extern int array[];
  30
  31 /* Verify the warning is issued even for calls in a system header inlined
  32    into a function outside the header.  */
  33
  34 NOIPA void warn_g0 (struct A *p)
  35 {
  36   int *q = array + 1;
  37
  38   f0 (p, q);
  39   g0 (p);
  40 }
  41
  42 // { dg-message "inlined from 'warn_g0'" "" { target *-*-* } 0 }
  43
  44
  45 /* Also verify the warning can be suppressed.  */
  46
  47 NOIPA void nowarn_g0 (struct A *p)
  48 {
  49   int *q = array + 2;
  50
  51   f0 (p, q);
  52
  53 #pragma GCC diagnostic push
  54 #pragma GCC diagnostic ignored "-Wfree-nonheap-object"
  55   g0 (p);
  56 #pragma GCC diagnostic pop
  57 }
  58
  59
  60 NOIPA void warn_g1 (struct A *p)
  61 {
  62   int *q = array + 3;
  63
  64   f1 (p, q);
  65   g1 (p);
  66 }
  67
  68 // { dg-message "inlined from 'g1'" "" { target *-*-* } 0 }
  69 // { dg-message "inlined from 'warn_g1'" "" { target *-*-* } 0 }
  70
  71
  72 NOIPA void nowarn_g1 (struct A *p)
  73 {
  74   int *q = array + 4;
  75
  76   f1 (p, q);
  77
  78 #pragma GCC diagnostic push
  79 #pragma GCC diagnostic ignored "-Wfree-nonheap-object"
  80   g1 (p);
  81 #pragma GCC diagnostic pop
  82 }
  83
  84
  85 NOIPA void warn_g2 (struct A *p)
  86 {
  87   int *q = array + 5;
  88
  89   f2 (p, q);
  90   g2 (p);
  91 }
  92
  93 // { dg-message "inlined from 'g2'" "" { target *-*-* } 0 }
  94 // { dg-message "inlined from 'warn_g2'" "" { target *-*-* } 0 }
  95
  96
  97 NOIPA void nowarn_g2 (struct A *p)
  98 {
  99   int *q = array + 6;
 100
 101   f2 (p, q);
 102
 103 #pragma GCC diagnostic push
 104 #pragma GCC diagnostic ignored "-Wfree-nonheap-object"
 105   g2 (p);
 106 #pragma GCC diagnostic pop
 107 }