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annotate gcc/testsuite/gcc.dg/sequence-pt-1.c @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
parents 04ced10e8804
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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111
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1 /* Test for sequence point warnings. */
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2 /* Origin: Michael Meeks in
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3 <URL:http://gcc.gnu.org/ml/gcc-patches/1998-06/msg00316.html>,
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4 adapted to a testcase by Joseph Myers <jsm28@cam.ac.uk>. */
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5 /* { dg-do compile } */
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6 /* { dg-options "-Wsequence-point" } */
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7
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8 struct s
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9 {
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10 int a;
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11 };
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12
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13 extern int fn (int);
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14 extern int fnb (int, int);
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15 extern int fnc (int *);
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16 extern int sprintf (char *, const char *, ...);
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17
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18 typedef __UINTPTR_TYPE__ uintptr_t;
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19
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20 void
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21 foo (int a, int b, int n, int p, int *ptr, struct s *sptr,
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22 int *ap, int *bp, int **cp, char *ans, int (*fnp[8])(int))
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23 {
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24 int len;
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25
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26 a = a++; /* { dg-warning "undefined" "sequence point warning" } */
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27 a = --a; /* { dg-warning "undefined" "sequence point warning" } */
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28 a = ++a + b; /* { dg-warning "undefined" "sequence point warning" } */
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29 a = a-- + b; /* { dg-warning "undefined" "sequence point warning" } */
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30 ap[n] = bp[n++]; /* { dg-warning "undefined" "sequence point warning" } */
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31 ap[--n] = bp[n]; /* { dg-warning "undefined" "sequence point warning" } */
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32 ap[++n] = bp[--n]; /* { dg-warning "undefined" "sequence point warning" } */
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33 cp[n][n] = cp[n][n]++; /* { dg-warning "undefined" "sequence point warning" } */
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34 cp[n][p] = cp[n][n++]; /* { dg-warning "undefined" "sequence point warning" } */
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35 *ptr++ = (uintptr_t)ptr++; /* { dg-warning "undefined" "sequence point warning" } */
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36 sptr->a = sptr->a++; /* { dg-warning "undefined" "sequence point warning" } */
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37 sptr->a = (uintptr_t)(sptr++); /* { dg-warning "undefined" "sequence point warning" } */
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38 *ptr++ = fn (*ptr); /* { dg-warning "undefined" "sequence point warning" } */
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39 a = b = a++; /* { dg-warning "undefined" "sequence point warning" } */
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40 b = a = --b; /* { dg-warning "undefined" "sequence point warning" } */
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41 a = 1 + (a = 1); /* { dg-warning "undefined" "sequence point warning" } */
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42 a = (a = b); /* { dg-warning "undefined" "sequence point warning" } */
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43 a = (a = b) + 1; /* { dg-warning "undefined" "sequence point warning" } */
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44 a = (bp[a++] = b) + 1; /* { dg-warning "undefined" "sequence point warning" } */
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45 a = b++ * b++; /* { dg-warning "undefined" "sequence point warning" } */
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46 a = fnb (b++, b++); /* { dg-warning "undefined" "sequence point warning" } */
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47 a = (*fnp[b++]) (b++); /* { dg-warning "undefined" "sequence point warning" } */
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48 a = (*fnp[b]) (b++); /* { dg-warning "undefined" "sequence point warning" } */
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49 a = (*fnp[b++]) (b); /* { dg-warning "undefined" "sequence point warning" } */
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50 *ap = fnc (ap++); /* { dg-warning "undefined" "sequence point warning" } */
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51 (a += b) + (a += n); /* { dg-warning "undefined" "sequence point warning" } */
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52 a = (b, b++) + (b++, b); /* { dg-warning "undefined" "sequence point warning" } */
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53 ap[a++] += a; /* { dg-warning "undefined" "sequence point warning" } */
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54 ap[a+=1] += a; /* { dg-warning "undefined" "sequence point warning" } */
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55 ap[a++] += a++; /* { dg-warning "undefined" "sequence point warning" } */
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56 ap[a+=1] += a++; /* { dg-warning "undefined" "sequence point warning" } */
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57 a = a++, b = a; /* { dg-warning "undefined" "sequence point warning" } */
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58 b = a, a = a++; /* { dg-warning "undefined" "sequence point warning" } */
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59 a = (b++ ? n : a) + b; /* { dg-warning "undefined" "sequence point warning" } */
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60 b ? a = a++ : a; /* { dg-warning "undefined" "sequence point warning" } */
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61 b && (a = a++); /* { dg-warning "undefined" "sequence point warning" } */
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62 (a = a++) && b; /* { dg-warning "undefined" "sequence point warning" } */
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63 b, (a = a++); /* { dg-warning "undefined" "sequence point warning" } */
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64 (a = a++), b; /* { dg-warning "undefined" "sequence point warning" } */
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65 a ^= b ^= a ^= b; /* { dg-warning "undefined" "sequence point warning" } */
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66
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67 a = a; /* { dg-bogus "undefined" "bogus sequence point warning" } */
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68 a = (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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69 a = ! (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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70 a = - (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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71 a = (double) (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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72 len = sprintf (ans, "%d", len++); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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73 a = fn (a++); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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74 b++, (b + b); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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75 (a = b++), (a = b++); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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76 a = (b++, b++); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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77 a = b++ && b++; /* { dg-bogus "undefined" "bogus sequence point warning" } */
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78 a = b++ || b++; /* { dg-bogus "undefined" "bogus sequence point warning" } */
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79 a = (b++ ? b++ : a); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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80 a = (b++ ? a : b++); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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81 ap[a++] += bp[b]; /* { dg-bogus "undefined" "bogus sequence point warning" } */
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82 ap[a += 1] += 1; /* { dg-bogus "undefined" "bogus sequence point warning" } */
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83 *ptr < 128 ? *ptr++ : *(ptr += 2); /* { dg-bogus "undefined" "bogus sequence point warning" } */
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84
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85 /* The following will be represented internally with a tree consisting of
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86 many duplicated SAVE_EXPRs. This caused the previous version of the
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87 sequence point warning code to fail by running out of virtual memory. */
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88 a = ((b & 1 ? 21 : 0)
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89 | (b & 2 ? 22 : 0)
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90 | (b & 3 ? 23 : 0)
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91 | (b & 4 ? 24 : 0)
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92 | (b & 5 ? 25 : 0)
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93 | (b & 6 ? 26 : 0)
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94 | (b & 7 ? 27 : 0)
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95 | (b & 8 ? 28 : 0)
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96 | (b & 9 ? 29 : 0)
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97 | (b & 10 ? 30 : 0)
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98 | (b & 11 ? 31 : 0)
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99 | (b & 12 ? 32 : 0)
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100 | (b & 13 ? 1 : 0)
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101 | (b & 14 ? 2 : 0)
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102 | (b & 15 ? 3 : 0)
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103 | (b & 16 ? 4 : 0)
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104 | (b & 17 ? 5 : 0)
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105 | (b & 18 ? 6 : 0)
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106 | (b & 19 ? 7 : 0)
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107 | (b & 20 ? 8 : 0)
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108 | (b & 21 ? 9 : 0));
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109 }