47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/* More sequence point warning tests */
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/* { dg-do compile } */
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/* { dg-options "-Wsequence-point" } */
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struct s { struct s *nxt; int v; } q;
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int x[10];
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int foo(int *p)
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{
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int i = 0;
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/* Test general-lvalue sequence point warnings */
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(*p) = (*p)++; /* { dg-warning "undefined" "sequence point warning" } */
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p[3] = p[3]++; /* { dg-warning "undefined" "sequence point warning" } */
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p[i] = p[i]++; /* { dg-warning "undefined" "sequence point warning" } */
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x[3] = x[3]++; /* { dg-warning "undefined" "sequence point warning" } */
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q.nxt->nxt->v = q.nxt->nxt->v++; /* { dg-warning "undefined" "sequence point warning" } */
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/* test expressions that appear elsewhere in the C grammar */
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{ int a = i-i++; (void)a;} /* { dg-warning "undefined" "sequence point warning" } */
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if ((i-i++) != 0) /* { dg-warning "undefined" "sequence point warning" } */
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return i-i++; /* { dg-warning "undefined" "sequence point warning" } */
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for (i-i++;;) /* { dg-warning "undefined" "sequence point warning" } */
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;
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for (; (i-i++) != 0; ) /* { dg-warning "undefined" "sequence point warning" } */
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;
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for (;;i-i++) /* { dg-warning "undefined" "sequence point warning" } */
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;
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while ((i-i++) != 0) /* { dg-warning "undefined" "sequence point warning" } */
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;
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do {} while ((i-i++) != 0); /* { dg-warning "undefined" "sequence point warning" } */
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switch (i-i++) { /* { dg-warning "undefined" "sequence point warning" } */
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case 0: return 1;
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}
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return 0;
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}
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