44 lines
2.0 KiB
C
44 lines
2.0 KiB
C
/* Test for constant expressions: overflow and constant expressions;
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see also overflow-warn-*.c for some other cases. */
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/* Origin: Joseph Myers <joseph@codesourcery.com> */
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/* { dg-do compile } */
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/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
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#include <float.h>
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#include <limits.h>
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int a = DBL_MAX; /* { dg-warning "overflow in implicit constant conversion" } */
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/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 10 } */
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int b = (int) DBL_MAX; /* { dg-error "overflow" "" } */
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unsigned int c = -1.0; /* { dg-warning "overflow in implicit constant conversion" } */
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/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 13 } */
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unsigned int d = (unsigned)-1.0; /* { dg-error "overflow" } */
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int e = 0 << 1000; /* { dg-warning "shift count" } */
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/* { dg-error "constant" "constant" { target *-*-* } 17 } */
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int f = 0 << -1; /* { dg-warning "shift count" } */
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/* { dg-error "constant" "constant" { target *-*-* } 19 } */
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int g = 0 >> 1000; /* { dg-warning "shift count" } */
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/* { dg-error "constant" "constant" { target *-*-* } 21 } */
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int h = 0 >> -1; /* { dg-warning "shift count" } */
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/* { dg-error "constant" "constant" { target *-*-* } 23 } */
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int b1 = (0 ? (int) DBL_MAX : 0);
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unsigned int d1 = (0 ? (unsigned int)-1.0 : 0);
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int e1 = (0 ? 0 << 1000 : 0);
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int f1 = (0 ? 0 << -1 : 0);
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int g1 = (0 ? 0 >> 1000 : 0);
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int h1 = (0 ? 0 >> -1: 0);
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/* Allowed for now, but actually undefined behavior in C99. */
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int i = -1 << 0;
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int j[1] = { DBL_MAX }; /* { dg-warning "overflow in implicit constant conversion" } */
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/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 36 } */
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int array[2] = { [0 * (INT_MAX + 1)] = 0 }; /* { dg-warning "integer overflow in expression" } */
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/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 39 } */
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_Bool k = INT_MAX + 1; /* { dg-warning "integer overflow in expression" } */
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/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 42 } */
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