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| author | Neil Booth <neil@daikokuya.demon.co.uk> | 2001-10-23 18:14:31 +0000 |
|---|---|---|
| committer | Neil Booth <neil@gcc.gnu.org> | 2001-10-23 18:14:31 +0000 |
| commit | 6c36d76bf6521dd1cc09b8d7e379a02d138ffd53 (patch) | |
| tree | a86518d1f2373ba547d08bd0867d006b5db75f24 /gcc/testsuite/gcc.dg/divbyzero.c | |
| parent | 28a8851e654560d565e7270812ea1b2e1c33b14d (diff) | |
| download | gcc-6c36d76bf6521dd1cc09b8d7e379a02d138ffd53.zip gcc-6c36d76bf6521dd1cc09b8d7e379a02d138ffd53.tar.gz gcc-6c36d76bf6521dd1cc09b8d7e379a02d138ffd53.tar.bz2 | |
c-common.c (warn_div_by_zero): New.
* 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.
From-SVN: r46439
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 0000000..607aa12 --- /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; +} |