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Commit 8444a5de by Manuel López-Ibáñez
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overflow-warn-1.C: Fix testcase. 

2007-01-08  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

testsuite/
	* g++.dg/warn/overflow-warn-1.C: Fix testcase.
	* g++.dg/warn/overflow-warn-3.C: Likewise.
	* g++.dg/warn/overflow-warn-4.C: Likewise.
	* g++.dg/warn/overflow-warn-5.C: Likewise.
	* g++.dg/warn/overflow-warn-6.C: Likewise.
	* g++.dg/warn/Woverflow-1.C: Likewise.
	* g++.dg/warn/Woverflow-2.C: Likewise.
	* g++.dg/warn/Woverflow-3.C: Likewise.
	* g++.dg/warn/multiple-overflow-warn-2.C: Likewise.

From-SVN: r120588
parent b251af97
Showing with 12 additions and 877 deletions
gcc/testsuite/ChangeLog
2007-01-08 Manuel Lopez-Ibanez <manu@gcc.gnu.org>
* g++.dg/warn/overflow-warn-1.C: Fix testcase.
* g++.dg/warn/overflow-warn-3.C: Likewise.
* g++.dg/warn/overflow-warn-4.C: Likewise.
* g++.dg/warn/overflow-warn-5.C: Likewise.
* g++.dg/warn/overflow-warn-6.C: Likewise.
* g++.dg/warn/Woverflow-1.C: Likewise.
* g++.dg/warn/Woverflow-2.C: Likewise.
* g++.dg/warn/Woverflow-3.C: Likewise.
* g++.dg/warn/multiple-overflow-warn-2.C: Likewise.
2007-01-08 Roger Sayle <roger@eyesopen.com>
* gfortran.dg/array_constructor_14.f90: New test case.
gcc/testsuite/g++.dg/warn/Woverflow-1.C
......@@ -5,17 +5,3 @@
int foo = INT_MAX + 1; /* { dg-warning "integer overflow" } */
/* { dg-do compile } */
/* { dg-options "-O2" } */
#include <limits.h>
int foo = INT_MAX + 1; /* { dg-warning "integer overflow" } */
/* { dg-do compile } */
/* { dg-options "-O2" } */
#include <limits.h>
int foo = INT_MAX + 1; /* { dg-warning "integer overflow" } */
gcc/testsuite/g++.dg/warn/Woverflow-2.C
......@@ -5,17 +5,3 @@
int foo = INT_MAX + 1; /* { dg-warning "integer overflow" } */
/* { dg-do compile } */
/* { dg-options "-O2 -Woverflow" } */
#include <limits.h>
int foo = INT_MAX + 1; /* { dg-warning "integer overflow" } */
/* { dg-do compile } */
/* { dg-options "-O2 -Woverflow" } */
#include <limits.h>
int foo = INT_MAX + 1; /* { dg-warning "integer overflow" } */
gcc/testsuite/g++.dg/warn/Woverflow-3.C
......@@ -5,17 +5,3 @@
int foo = INT_MAX + 1;
/* { dg-do compile } */
/* { dg-options "-O2 -Wno-overflow" } */
#include <limits.h>
int foo = INT_MAX + 1;
/* { dg-do compile } */
/* { dg-options "-O2 -Wno-overflow" } */
#include <limits.h>
int foo = INT_MAX + 1;
gcc/testsuite/g++.dg/warn/multiple-overflow-warn-2.C
......@@ -10,27 +10,3 @@ g1 (void)
return INT_MAX + 1 - INT_MAX; /* { dg-bogus "integer overflow in expression.*integer overflow in expression" } */
/* { dg-warning "integer overflow in expression" "" { target *-*-* } 10 } */
}
/* PR c/19978 : Test for duplicated warnings (binary operators). */
/* { dg-do compile } */
/* { dg-options "-Woverflow" } */
#include <limits.h>
int
g1 (void)
{
return INT_MAX + 1 - INT_MAX; /* { dg-bogus "integer overflow in expression.*integer overflow in expression" } */
/* { dg-warning "integer overflow in expression" "" { target *-*-* } 10 } */
}
/* PR c/19978 : Test for duplicated warnings (binary operators). */
/* { dg-do compile } */
/* { dg-options "-Woverflow" } */
#include <limits.h>
int
g1 (void)
{
return INT_MAX + 1 - INT_MAX; /* { dg-bogus "integer overflow in expression.*integer overflow in expression" } */
/* { dg-warning "integer overflow in expression" "" { target *-*-* } 10 } */
}
gcc/testsuite/g++.dg/warn/overflow-warn-1.C
......@@ -122,248 +122,3 @@ h2i (int x)
ui = INT_MIN;
ui = x ? INT_MIN : 1U;
}
/* Test for diagnostics for constant overflow. */
/* Origin: Joseph Myers <joseph@codesourcery.com> */
/* { dg-do compile } */
/* { dg-options "" } */
#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" } */
/* Again, overflow in evaluated subexpression. */
E6 = 0 * (INT_MAX + 1), /* { dg-warning "warning: integer overflow in expression" } */
/* 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" } */
};
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. */
static int sc = INT_MAX + 1; /* { dg-warning "warning: integer overflow in expression" } */
/* 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 *-*-* } 48 } */
void *q = 0 * (1 / 0); /* { dg-warning "warning: division by zero" } */
/* { dg-error "invalid conversion from 'int' to 'void*'" "null" { xfail *-*-* } 50 } */
void *r = (1 ? 0 : INT_MAX+1); /* { dg-bogus "integer overflow in expression" "" { xfail *-*-* } 52 } */
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" } */
;
}
}
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);
fsc (SCHAR_MIN - 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
fsc (UCHAR_MAX);
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. */
/* Origin: Joseph Myers <joseph@codesourcery.com> */
/* { dg-do compile } */
/* { dg-options "" } */
#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" } */
/* Again, overflow in evaluated subexpression. */
E6 = 0 * (INT_MAX + 1), /* { dg-warning "warning: integer overflow in expression" } */
/* 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" } */
};
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 *-*-* } 51 } */
void *q = 0 * (1 / 0); /* { dg-warning "warning: division by zero" } */
/* { dg-error "invalid conversion from 'int' to 'void*'" "null" { xfail *-*-* } 53 } */
void *r = (1 ? 0 : INT_MAX+1); /* { dg-bogus "integer overflow in expression" "" { xfail *-*-* } 55 } */
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" } */
;
}
}
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);
fsc (SCHAR_MIN - 1); /* { dg-warning "warning: overflow in implicit constant conversion" } */
fsc (UCHAR_MAX);
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;
}
gcc/testsuite/g++.dg/warn/overflow-warn-3.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. */
/* 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;
}
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;
}
gcc/testsuite/g++.dg/warn/overflow-warn-5.C
......@@ -5,17 +5,3 @@
unsigned char rx_async(unsigned char p) {
return p & 512; /* { dg-warning "overflow in implicit constant conversion" } */
}
/* PR c/27273 */
/* { dg-do compile } */
/* { dg-options "-Woverflow" } */
unsigned char rx_async(unsigned char p) {
return p & 512; /* { dg-warning "overflow in implicit constant conversion" } */
}
/* PR c/27273 */
/* { dg-do compile } */
/* { dg-options "-Woverflow" } */
unsigned char rx_async(unsigned char p) {
return p & 512; /* { dg-warning "overflow in implicit constant conversion" } */
}
gcc/testsuite/g++.dg/warn/overflow-warn-6.C
......@@ -16,39 +16,3 @@ h2 (int x)
return ((INT_MAX + 1) * 0) * x; /* { dg-warning "warning: integer overflow in expression" } */
}
/* Test non-constant operands in overflowed expressions. */
/* { dg-do compile } */
/* { dg-options "-Woverflow" } */
#include <limits.h>
int
h1 (int x)
{
return x * (0 * (INT_MAX + 1)); /* { dg-warning "warning: integer overflow in expression" } */
}
int
h2 (int x)
{
return ((INT_MAX + 1) * 0) * x; /* { dg-warning "warning: integer overflow in expression" } */
}
/* Test non-constant operands in overflowed expressions. */
/* { dg-do compile } */
/* { dg-options "-Woverflow" } */
#include <limits.h>
int
h1 (int x)
{
return x * (0 * (INT_MAX + 1)); /* { dg-warning "warning: integer overflow in expression" } */
}
int
h2 (int x)
{
return ((INT_MAX + 1) * 0) * x; /* { dg-warning "warning: integer overflow in expression" } */
}
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