diff options
| author | neil <neil@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-10-23 18:14:31 +0000 |
|---|---|---|
| committer | neil <neil@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-10-23 18:14:31 +0000 |
| commit | bd08a4e696f9fc58eb5a47250566867849a358e4 (patch) | |
| tree | a86518d1f2373ba547d08bd0867d006b5db75f24 /gcc/testsuite/gcc.dg/divbyzero.c | |
| parent | 753a360f09c905c575eb1a106827a2e74c2e6bdc (diff) | |
| download | gcc-bd08a4e696f9fc58eb5a47250566867849a358e4.tar.gz | |
* c-common.c (warn_div_by_zero): New.
* c-common.h (warn_div_by_zero): New.
* c-decl.c (c_decode_option): Take it on the command line.
* c-typeck.c (build_binary_op): Warn about division by zero.
* doc/invoke.texi: Document the new command line option, fix
documentation of -Wmultichar.
* testsuite/gcc.dg/divbyzero.c: New tests.
* testsuite/gcc.dg/noncompile/20010524-1.c: Update.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46439 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/testsuite/gcc.dg/divbyzero.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/divbyzero.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/divbyzero.c b/gcc/testsuite/gcc.dg/divbyzero.c new file mode 100644 index 00000000000..607aa12d568 --- /dev/null +++ b/gcc/testsuite/gcc.dg/divbyzero.c @@ -0,0 +1,21 @@ +/* Copyright (C) 2001 Free Software Foundation, Inc. */ + +/* { dg-do compile } */ + +/* Source: Neil Booth, Oct 22 2001. PR 150 - warn about division by + zero. */ + +#define ZERO (4 - 6 + 2) + +int main (int argc, char *argv[]) +{ + int w = argc % ZERO; /* { dg-warning "division by zero" } */ + int x = argc / 0; /* { dg-warning "division by zero" } */ + int y = argc / ZERO; /* { dg-warning "division by zero" } */ + + double z = 0.0 / 0.0 ; /* { dg-bogus "division by zero" } */ + w = (ZERO ? y / ZERO : x); /* { dg-bogus "division by zero" } */ + x = (ZERO ? argc % ZERO: x); /* { dg-bogus "division by zero" } */ + + return 0; +} |