diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/warn/overflow-warn-4.C')
| -rw-r--r-- | gcc/testsuite/g++.dg/warn/overflow-warn-4.C | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/gcc/testsuite/g++.dg/warn/overflow-warn-4.C b/gcc/testsuite/g++.dg/warn/overflow-warn-4.C index 4d4ecf0bf02..65e220070fb 100644 --- a/gcc/testsuite/g++.dg/warn/overflow-warn-4.C +++ b/gcc/testsuite/g++.dg/warn/overflow-warn-4.C @@ -128,261 +128,3 @@ h2i (int x) ui = INT_MIN; ui = x ? INT_MIN : 1U; } -/* Test for diagnostics for constant overflow. Test with -pedantic-errors. */ -/* Origin: Joseph Myers <joseph@codesourcery.com> */ -/* { dg-do compile } */ -/* { dg-options "-pedantic-errors" } */ - -#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-error "error: 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-error "error: 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-error "error: 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-error "error: 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-error "error: 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-errors. */ -/* Origin: Joseph Myers <joseph@codesourcery.com> */ -/* { dg-do compile } */ -/* { dg-options "-pedantic-errors" } */ - -#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-error "error: 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-error "error: 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-error "error: 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-error "error: 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; -} |
