ui = INT_MIN;
ui = x ? INT_MIN : 1U;
}
-/* Test for diagnostics for constant overflow. Test with -pedantic. */
-/* Origin: Joseph Myers <joseph@codesourcery.com> */
-/* { dg-do compile } */
-/* { dg-options "-fpermissive -pedantic" } */
-
-#include <limits.h>
-
-enum e {
- E0 = INT_MAX,
- /* Unsigned overflow wraps around. */
- E1 = UINT_MAX + 1,
- /* Overflow in an unevaluated part of an expression is OK (example
- in the standard). */
- E2 = 2 || 1 / 0, /* { dg-bogus "warning: division by zero" "" { xfail *-*-* } 14 } */
- E3 = 1 / 0, /* { dg-warning "warning: division by zero" } */
- /* { dg-error "error: enumerator value for 'E3' is not an integer constant" "enum error" { target *-*-* } 15 } */
- /* But as in DR#031, the 1/0 in an evaluated subexpression means the
- whole expression violates the constraints. */
- E4 = 0 * (1 / 0), /* { dg-warning "warning: division by zero" } */
- /* { dg-error "error: enumerator value for 'E4' is not an integer constant" "enum error" { xfail *-*-* } 19 } */
- E5 = INT_MAX + 1, /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 21 } */
- /* Again, overflow in evaluated subexpression. */
- E6 = 0 * (INT_MAX + 1), /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 24 } */
- /* A cast does not constitute overflow in conversion. */
- E7 = (char) INT_MAX
-};
-
-struct s {
- int a;
- int : 0 * (1 / 0); /* { dg-warning "warning: division by zero" } */
- int : 0 * (INT_MAX + 1); /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 33 } */
-};
-
-void
-f (void)
-{
- /* This expression is not required to be a constant expression, so
- it should just involve undefined behavior at runtime. */
- int c = INT_MAX + 1; /* { dg-warning "warning: integer overflow in expression" } */
-
-}
-
-/* But this expression does need to be constant (in C++ ???). */
-static int sc = INT_MAX + 1; /* { dg-warning "warning: integer overflow in expression" } */
-/* { dg-warning "warning: overflow in constant expression" "constant" { xfail *-*-* } 47 } */
-
-/* The first two of these involve overflow, so are not null pointer
- constants. The third has the overflow in an unevaluated
- subexpression, so is a null pointer constant. */
-void *p = 0 * (INT_MAX + 1); /* { dg-warning "warning: integer overflow in expression" } */
-/* { dg-error "invalid conversion from 'int' to 'void" "null" { target *-*-* } 53 } */
-
-void *q = 0 * (1 / 0); /* { dg-warning "warning: division by zero" } */
-/* { dg-error "invalid conversion from 'int' to 'void*'" "null" { xfail *-*-* } 56 } */
-void *r = (1 ? 0 : INT_MAX+1); /* { dg-bogus "integer overflow in expression" "" { xfail *-*-* } 58 } */
-
-void
-g (int i)
-{
- switch (i)
- {
- case 0 * (1/0): /* { dg-warning "warning: division by zero" } */
- ;
- case 1 + 0 * (INT_MAX + 1): /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 67 } */
- ;
- }
-}
-
-int
-h (void)
-{
- return INT_MAX + 1; /* { dg-warning "warning: integer overflow in expression" } */
-}
-
-int
-h1 (void)
-{
- return INT_MAX + 1 - INT_MAX; /* { dg-warning "warning: integer overflow in expression" } */
-}
-
-void fuc (unsigned char);
-void fsc (signed char);
-
-void
-h2 (void)
-{
- fsc (SCHAR_MAX + 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fsc (SCHAR_MIN - 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fsc (UCHAR_MAX); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fsc (UCHAR_MAX + 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fuc (-1);
- fuc (UCHAR_MAX + 1); /* { dg-warning "warning: large integer implicitly truncated to unsigned type" } */
- fuc (SCHAR_MIN);
- fuc (SCHAR_MIN - 1); /* { dg-warning "warning: large integer implicitly truncated to unsigned type" } */
- fuc (-UCHAR_MAX); /* { dg-warning "warning: large integer implicitly truncated to unsigned type" } */
-}
-
-void fui (unsigned int);
-void fsi (signed int);
-
-int si;
-unsigned ui;
-
-void
-h2i (int x)
-{
- /* For some reason, we only give certain warnings for implicit
- conversions among values of the same precision with -Wconversion,
- while we don't give others at all. */
- fsi ((unsigned)INT_MAX + 1);
- si = (unsigned)INT_MAX + 1;
- si = x ? (unsigned)INT_MAX + 1 : 1;
- fsi ((unsigned)INT_MAX + 2);
- si = (unsigned)INT_MAX + 2;
- si = x ? (unsigned)INT_MAX + 2 : 1;
- fsi (UINT_MAX);
- si = UINT_MAX;
- fui (-1);
- ui = -1;
- ui = x ? -1 : 1U;
- fui (INT_MIN);
- ui = INT_MIN;
- ui = x ? INT_MIN : 1U;
-}
-/* Test for diagnostics for constant overflow. Test with -pedantic. */
-/* Origin: Joseph Myers <joseph@codesourcery.com> */
-/* { dg-do compile } */
-/* { dg-options "-fpermissive -pedantic" } */
-
-#include <limits.h>
-
-enum e {
- E0 = INT_MAX,
- /* Unsigned overflow wraps around. */
- E1 = UINT_MAX + 1,
- /* Overflow in an unevaluated part of an expression is OK (example
- in the standard). */
- E2 = 2 || 1 / 0, /* { dg-bogus "warning: division by zero" "" { xfail *-*-* } 14 } */
- E3 = 1 / 0, /* { dg-warning "warning: division by zero" } */
- /* { dg-error "error: enumerator value for 'E3' is not an integer constant" "enum error" { target *-*-* } 15 } */
- /* But as in DR#031, the 1/0 in an evaluated subexpression means the
- whole expression violates the constraints. */
- E4 = 0 * (1 / 0), /* { dg-warning "warning: division by zero" } */
- /* { dg-error "error: enumerator value for 'E4' is not an integer constant" "enum error" { xfail *-*-* } 19 } */
- E5 = INT_MAX + 1, /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 21 } */
- /* Again, overflow in evaluated subexpression. */
- E6 = 0 * (INT_MAX + 1), /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 24 } */
- /* A cast does not constitute overflow in conversion. */
- E7 = (char) INT_MAX
-};
-
-struct s {
- int a;
- int : 0 * (1 / 0); /* { dg-warning "warning: division by zero" } */
- int : 0 * (INT_MAX + 1); /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 33 } */
-};
-
-void
-f (void)
-{
- /* This expression is not required to be a constant expression, so
- it should just involve undefined behavior at runtime. */
- int c = INT_MAX + 1; /* { dg-warning "warning: integer overflow in expression" } */
-
-}
-
-/* This expression is neither required to be constant. */
-static int sc = INT_MAX + 1; /* { dg-warning "warning: integer overflow in expression" } */
-
-
-// Test for overflow in null pointer constant.
-void *n = 0;
-/* The first two of these involve overflow, so are not null pointer
- constants. The third has the overflow in an unevaluated
- subexpression, so is a null pointer constant. */
-void *p = 0 * (INT_MAX + 1); /* { dg-warning "warning: integer overflow in expression" } */
-/* { dg-error "invalid conversion from 'int' to 'void" "null" { target *-*-* } 55 } */
-
-void *q = 0 * (1 / 0); /* { dg-warning "warning: division by zero" } */
-/* { dg-error "invalid conversion from 'int' to 'void*'" "null" { xfail *-*-* } 58 } */
-void *r = (1 ? 0 : INT_MAX+1); /* { dg-bogus "integer overflow in expression" "" { xfail *-*-* } 60 } */
-
-void
-g (int i)
-{
- switch (i)
- {
- case 0 * (1/0): /* { dg-warning "warning: division by zero" } */
- ;
- case 1 + 0 * (INT_MAX + 1): /* { dg-warning "warning: integer overflow in expression" } */
- /* { dg-warning "warning: overflow in constant expression" "constant" { target *-*-* } 69 } */
- ;
- }
-}
-
-int
-h (void)
-{
- return INT_MAX + 1; /* { dg-warning "warning: integer overflow in expression" } */
-}
-
-int
-h1 (void)
-{
- return INT_MAX + 1 - INT_MAX; /* { dg-warning "warning: integer overflow in expression" } */
-}
-
-void fuc (unsigned char);
-void fsc (signed char);
-
-void
-h2 (void)
-{
- fsc (SCHAR_MAX + 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fsc (SCHAR_MIN - 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fsc (UCHAR_MAX); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fsc (UCHAR_MAX + 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
- fuc (-1);
- fuc (UCHAR_MAX + 1); /* { dg-warning "warning: large integer implicitly truncated to unsigned type" } */
- fuc (SCHAR_MIN);
- fuc (SCHAR_MIN - 1); /* { dg-warning "warning: large integer implicitly truncated to unsigned type" } */
- fuc (-UCHAR_MAX); /* { dg-warning "warning: large integer implicitly truncated to unsigned type" } */
-}
-
-void fui (unsigned int);
-void fsi (signed int);
-
-int si;
-unsigned ui;
-
-void
-h2i (int x)
-{
- /* For some reason, we only give certain warnings for implicit
- conversions among values of the same precision with -Wconversion,
- while we don't give others at all. */
- fsi ((unsigned)INT_MAX + 1);
- si = (unsigned)INT_MAX + 1;
- si = x ? (unsigned)INT_MAX + 1 : 1;
- fsi ((unsigned)INT_MAX + 2);
- si = (unsigned)INT_MAX + 2;
- si = x ? (unsigned)INT_MAX + 2 : 1;
- fsi (UINT_MAX);
- si = UINT_MAX;
- fui (-1);
- ui = -1;
- ui = x ? -1 : 1U;
- fui (INT_MIN);
- ui = INT_MIN;
- ui = x ? INT_MIN : 1U;
-}
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