1/* Test for sequence point warnings. */ 2/* Origin: Michael Meeks in 3 <URL:http://gcc.gnu.org/ml/gcc-patches/1998-06/msg00316.html>, 4 adapted to a testcase by Joseph Myers <jsm28@cam.ac.uk>. */ 5/* { dg-do compile } */ 6/* { dg-options "-Wsequence-point" } */ 7 8struct s 9{ 10 int a; 11}; 12 13extern int fn (int); 14extern int fnb (int, int); 15extern int fnc (int *); 16extern int sprintf (char *, const char *, ...); 17 18typedef __SIZE_TYPE__ size_t; 19 20void 21foo (int a, int b, int n, int p, int *ptr, struct s *sptr, 22 int *ap, int *bp, int **cp, char *ans, int (*fnp[8])(int)) 23{ 24 int len; 25 26 a = a++; /* { dg-warning "undefined" "sequence point warning" } */ 27 a = --a; /* { dg-warning "undefined" "sequence point warning" } */ 28 a = ++a + b; /* { dg-warning "undefined" "sequence point warning" } */ 29 a = a-- + b; /* { dg-warning "undefined" "sequence point warning" } */ 30 ap[n] = bp[n++]; /* { dg-warning "undefined" "sequence point warning" } */ 31 ap[--n] = bp[n]; /* { dg-warning "undefined" "sequence point warning" } */ 32 ap[++n] = bp[--n]; /* { dg-warning "undefined" "sequence point warning" } */ 33 cp[n][n] = cp[n][n]++; /* { dg-warning "undefined" "sequence point warning" } */ 34 cp[n][p] = cp[n][n++]; /* { dg-warning "undefined" "sequence point warning" } */ 35 *ptr++ = (size_t)ptr++; /* { dg-warning "undefined" "sequence point warning" } */ 36 sptr->a = sptr->a++; /* { dg-warning "undefined" "sequence point warning" } */ 37 sptr->a = (size_t)(sptr++); /* { dg-warning "undefined" "sequence point warning" } */ 38 *ptr++ = fn (*ptr); /* { dg-warning "undefined" "sequence point warning" } */ 39 a = b = a++; /* { dg-warning "undefined" "sequence point warning" } */ 40 b = a = --b; /* { dg-warning "undefined" "sequence point warning" } */ 41 a = 1 + (a = 1); /* { dg-warning "undefined" "sequence point warning" } */ 42 a = (a = b); /* { dg-warning "undefined" "sequence point warning" } */ 43 a = (a = b) + 1; /* { dg-warning "undefined" "sequence point warning" } */ 44 a = (bp[a++] = b) + 1; /* { dg-warning "undefined" "sequence point warning" } */ 45 a = b++ * b++; /* { dg-warning "undefined" "sequence point warning" } */ 46 a = fnb (b++, b++); /* { dg-warning "undefined" "sequence point warning" } */ 47 a = (*fnp[b++]) (b++); /* { dg-warning "undefined" "sequence point warning" } */ 48 a = (*fnp[b]) (b++); /* { dg-warning "undefined" "sequence point warning" } */ 49 a = (*fnp[b++]) (b); /* { dg-warning "undefined" "sequence point warning" } */ 50 *ap = fnc (ap++); /* { dg-warning "undefined" "sequence point warning" } */ 51 (a += b) + (a += n); /* { dg-warning "undefined" "sequence point warning" } */ 52 a = (b, b++) + (b++, b); /* { dg-warning "undefined" "sequence point warning" } */ 53 ap[a++] += a; /* { dg-warning "undefined" "sequence point warning" } */ 54 ap[a+=1] += a; /* { dg-warning "undefined" "sequence point warning" } */ 55 ap[a++] += a++; /* { dg-warning "undefined" "sequence point warning" } */ 56 ap[a+=1] += a++; /* { dg-warning "undefined" "sequence point warning" } */ 57 a = a++, b = a; /* { dg-warning "undefined" "sequence point warning" } */ 58 b = a, a = a++; /* { dg-warning "undefined" "sequence point warning" } */ 59 a = (b++ ? n : a) + b; /* { dg-warning "undefined" "sequence point warning" } */ 60 b ? a = a++ : a; /* { dg-warning "undefined" "sequence point warning" } */ 61 b && (a = a++); /* { dg-warning "undefined" "sequence point warning" } */ 62 (a = a++) && b; /* { dg-warning "undefined" "sequence point warning" } */ 63 b, (a = a++); /* { dg-warning "undefined" "sequence point warning" } */ 64 (a = a++), b; /* { dg-warning "undefined" "sequence point warning" } */ 65 a ^= b ^= a ^= b; /* { dg-warning "undefined" "sequence point warning" } */ 66 67 a = a; /* { dg-bogus "undefined" "bogus sequence point warning" } */ 68 a = (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 69 a = ! (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 70 a = - (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 71 a = (double) (a++ && 4); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 72 len = sprintf (ans, "%d", len++); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 73 a = fn (a++); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 74 b++, (b + b); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 75 (a = b++), (a = b++); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 76 a = (b++, b++); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 77 a = b++ && b++; /* { dg-bogus "undefined" "bogus sequence point warning" } */ 78 a = b++ || b++; /* { dg-bogus "undefined" "bogus sequence point warning" } */ 79 a = (b++ ? b++ : a); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 80 a = (b++ ? a : b++); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 81 ap[a++] += bp[b]; /* { dg-bogus "undefined" "bogus sequence point warning" } */ 82 ap[a += 1] += 1; /* { dg-bogus "undefined" "bogus sequence point warning" } */ 83 *ptr < 128 ? *ptr++ : *(ptr += 2); /* { dg-bogus "undefined" "bogus sequence point warning" } */ 84 85 /* The following will be represented internally with a tree consisting of 86 many duplicated SAVE_EXPRs. This caused the previous version of the 87 sequence point warning code to fail by running out of virtual memory. */ 88 a = ((b & 1 ? 21 : 0) 89 | (b & 2 ? 22 : 0) 90 | (b & 3 ? 23 : 0) 91 | (b & 4 ? 24 : 0) 92 | (b & 5 ? 25 : 0) 93 | (b & 6 ? 26 : 0) 94 | (b & 7 ? 27 : 0) 95 | (b & 8 ? 28 : 0) 96 | (b & 9 ? 29 : 0) 97 | (b & 10 ? 30 : 0) 98 | (b & 11 ? 31 : 0) 99 | (b & 12 ? 32 : 0) 100 | (b & 13 ? 1 : 0) 101 | (b & 14 ? 2 : 0) 102 | (b & 15 ? 3 : 0) 103 | (b & 16 ? 4 : 0) 104 | (b & 17 ? 5 : 0) 105 | (b & 18 ? 6 : 0) 106 | (b & 19 ? 7 : 0) 107 | (b & 20 ? 8 : 0) 108 | (b & 21 ? 9 : 0)); 109} 110