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| author | Richard Henderson <rth@redhat.com> | 2002-04-25 19:15:52 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2002-04-25 19:15:52 -0700 |
| commit | 5c5b22838958187f83bf60d0394cc06942796646 (patch) | |
| tree | d191e51bd4b8889ad81bf2f13318123a238b62bb /gcc/testsuite/gcc.dg/compare6.c | |
| parent | 28ce94d46b9b885cc01f1649bc545b6978e033d0 (diff) | |
| download | gcc-5c5b22838958187f83bf60d0394cc06942796646.zip gcc-5c5b22838958187f83bf60d0394cc06942796646.tar.gz gcc-5c5b22838958187f83bf60d0394cc06942796646.tar.bz2 | |
re PR c/2098 (compare with unsigned variable - no error reporting)
PR c/2098
* c-common.c (shorten_compare): Simplfy conditions leading to
the generation of a warning.
* gcc.dg/compare6.c: New.
From-SVN: r52778
Diffstat (limited to 'gcc/testsuite/gcc.dg/compare6.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/compare6.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/compare6.c b/gcc/testsuite/gcc.dg/compare6.c new file mode 100644 index 0000000..fbeb6a0 --- /dev/null +++ b/gcc/testsuite/gcc.dg/compare6.c @@ -0,0 +1,13 @@ +/* PR c/2098 */ +/* Test for a warning on comparison on out-of-range data. */ +/* { dg-do compile { xfail c4x-*-* } } */ +/* { dg-options "-Wall" } */ + +signed char sc; +unsigned char uc; + +void foo() +{ + if (sc == 10000) return; /* { dg-warning "always false" "signed" } */ + if (uc == 10000) return; /* { dg-warning "always false" "unsigned" } */ +} |