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jeremybenn |
/* Test for diagnostics for implicit conversions between signed and
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unsigned integer types.
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These tests come from gcc/testsuite/gcc.dg/overflow-warn-2.c */
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/* { dg-do compile } */
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/* { dg-options "-std=c99 -fsigned-char -Wsign-conversion" } */
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#include <limits.h>
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void fsc (signed char sc);
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void fuc (unsigned char uc);
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unsigned fui (unsigned int ui);
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void fsi (signed int ui);
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void h (int x)
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{
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unsigned int ui = 3;
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int si = 3;
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unsigned char uc = 3;
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signed char sc = 3;
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uc = ui;
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uc = si;
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sc = ui;
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sc = si;
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fuc (ui);
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fuc (si);
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fsc (ui);
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fsc (si);
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fsi (si);
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fui (ui);
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fsi (uc);
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si = uc;
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fui (uc);
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ui = uc;
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fui ('A');
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ui = 'A';
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fsi ('A');
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si = 'A';
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fuc ('A');
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uc = 'A';
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uc = x ? 1U : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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uc = x ? SCHAR_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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uc = x ? 1 : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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uc = x ? SCHAR_MIN : 1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = x ? 1U : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = x ? INT_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = ui ? SCHAR_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = 1U * -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = ui + INT_MIN; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = x ? 1 : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = ui ? SCHAR_MIN : 1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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fuc (-1); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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uc = -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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fui (-1); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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fuc ('\xa0'); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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uc = '\xa0'; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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fui ('\xa0');/* { dg-warning "negative integer implicitly converted to unsigned type" } */
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ui = '\xa0'; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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fsi (0x80000000); /* { dg-warning "conversion" } */
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si = 0x80000000; /* { dg-warning "conversion" } */
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fsi (UINT_MAX - 1); /* { dg-warning "conversion" } */
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si = UINT_MAX - 1; /* { dg-warning "conversion" } */
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fsi (UINT_MAX - 1U); /* { dg-warning "conversion" } */
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si = UINT_MAX - 1U; /* { dg-warning "conversion" } */
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fsi (UINT_MAX/3U);
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si = UINT_MAX/3U;
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fsi (UINT_MAX/3);
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si = UINT_MAX/3;
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fui (UINT_MAX - 1);
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ui = UINT_MAX - 1;
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uc = (unsigned char) -1;
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ui = -1 * (1 * -1);
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ui = (unsigned) -1;
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fsc (uc); /* { dg-warning "conversion" } */
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sc = uc; /* { dg-warning "conversion" } */
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fuc (sc); /* { dg-warning "conversion" } */
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uc = sc; /* { dg-warning "conversion" } */
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fsi (ui); /* { dg-warning "conversion" } */
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si = ui; /* { dg-warning "conversion" } */
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fui (si); /* { dg-warning "conversion" } */
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ui = si; /* { dg-warning "conversion" } */
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fui (sc); /* { dg-warning "conversion" } */
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ui = sc; /* { dg-warning "conversion" } */
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}
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unsigned fui (unsigned a) { return a + -1; } /* { dg-warning "negative integer implicitly converted to unsigned type" } */
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