98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* Verify that offsets in "anti-ranges" are handled correctly.
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{ dg-do compile }
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{ dg-options "-O2 -Wall -ftrack-macro-expansion=0 -fno-ipa-icf" } */
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typedef __PTRDIFF_TYPE__ ptrdiff_t;
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typedef __SIZE_TYPE__ size_t;
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void* memset (void*, int, size_t);
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void sink (void*, ...);
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#define T(x) sink (x)
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void int_range_add_sub_ (int i, int j)
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{
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if (i < 1) i = 1;
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if (j > -1) j = -1;
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char ca5[5]; // { dg-message "at offset \\\[1, 5]" "note" }
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char *p0 = ca5; // offset
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char *p1 = p0 + i; // 1-5
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char *p2 = p1 + i; // 2-5
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char *p3 = p2 + j; // 0-4
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char *p4 = p3 + j; // 0-3
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char *p5 = p4 + j; // 0-2
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char *p6 = p5 + j; // 0-1
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char *p7 = p6 + i; // 1-2
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memset (p7, 0, 5); // { dg-warning "writing 5 bytes into a region of size 4" }
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sink (p0, p1, p2, p3, p4, p5, p6, p7);
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}
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void ruint_arint_add (unsigned i, int j)
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{
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i |= 1; // [1, UINT_MAX]
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j |= 1; // [INT_MIN + 1, -1] U [1, INT_MAX]
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char a[5]; // { dg-message "at offset \\\[1, 5]" "note" }
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char *p0 = a; // offset
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char *p1 = p0 + i; // 1-5
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T (memset (p1, 0, 4));
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char *p2 = p1 + j; // 0-5
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T (memset (p2, 0, 5));
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char *p3 = p2 + i; // 1-5
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T (memset (p3, 0, 4));
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char *p4 = p3 + j; // 0-5
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T (memset (p4, 0, 5));
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char *p5 = p4 + i; // 1-5
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T (memset (p5, 0, 4));
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char *p6 = p5 + j; // 0-5
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T (memset (p6, 0, 5));
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char *p7 = p6 + i; // 1-5
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T (memset (p7, 0, 5)); // { dg-warning "writing 5 bytes into a region of size 4" "" }
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}
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void warn_ptrdiff_anti_range_add (ptrdiff_t i)
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{
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i |= 1;
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char ca5[5]; // { dg-message "at offset \\\[1, 5]" "pr?????" }
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char *p0 = ca5; // offset
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char *p1 = p0 + i; // 1-5
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char *p2 = p1 + i; // 2-5
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char *p3 = p2 + i; // 3-5
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char *p4 = p3 + i; // 4-5
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char *p5 = p4 + i; // 5
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memset (p5, 0, 5); // { dg-warning "writing 5 bytes into a region of size" "pr?????" }
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sink (p0, p1, p2, p3, p4, p5);
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}
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void warn_int_anti_range (int i)
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{
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i |= 1;
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char ca5[5]; // { dg-message "at offset \\\[1, 5]" "pr?????" }
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char *p0 = ca5; // offset
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char *p1 = p0 + i; // 1-5
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char *p2 = p1 + i; // 2-5
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char *p3 = p2 + i; // 3-5
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char *p4 = p3 + i; // 4-5
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char *p5 = p4 + i; // 5
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memset (p5, 0, 5); // { dg-warning "writing 5 bytes into a region of size" "pr?????" }
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sink (p0, p1, p2, p3, p4, p5);
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}
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