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| author | Richard Guenther <rguenther@suse.de> | 2008-04-08 21:57:43 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2008-04-08 21:57:43 +0000 |
| commit | 02765a37a16527a510600c206bb0fe176d255525 (patch) | |
| tree | 07a7d78fde26b05761a85a44a2199eb920893518 | |
| parent | a0f3928210c3b652eb7804144f59db9f8fe98334 (diff) | |
| download | gcc-02765a37a16527a510600c206bb0fe176d255525.zip gcc-02765a37a16527a510600c206bb0fe176d255525.tar.gz gcc-02765a37a16527a510600c206bb0fe176d255525.tar.bz2 | |
fold-const.c (fold_widened_comparison): Do not allow sign-changes that change the result.
2008-04-08 Richard Guenther <rguenther@suse.de>
* fold-const.c (fold_widened_comparison): Do not allow
sign-changes that change the result.
* gcc.c-torture/execute/20080408-1.c: New testcase.
From-SVN: r134108
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/20080408-1.c | 11 |
4 files changed, 25 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c7b8ad0..1151620 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2008-04-08 Richard Guenther <rguenther@suse.de> + + * fold-const.c (fold_widened_comparison): Do not allow + sign-changes that change the result. + 2008-04-08 Janis Johnson <janis187@us.ibm.com> PR target/35839 diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 26550b9..66e72a7 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -6721,7 +6721,11 @@ fold_widened_comparison (enum tree_code code, tree type, tree arg0, tree arg1) || TYPE_UNSIGNED (TREE_TYPE (arg0)) == TYPE_UNSIGNED (shorter_type)) && (TREE_TYPE (arg1_unw) == shorter_type || (TYPE_PRECISION (shorter_type) - >= TYPE_PRECISION (TREE_TYPE (arg1_unw))) + > TYPE_PRECISION (TREE_TYPE (arg1_unw))) + || ((TYPE_PRECISION (shorter_type) + == TYPE_PRECISION (TREE_TYPE (arg1_unw))) + && (TYPE_UNSIGNED (shorter_type) + == TYPE_UNSIGNED (TREE_TYPE (arg1_unw)))) || (TREE_CODE (arg1_unw) == INTEGER_CST && (TREE_CODE (shorter_type) == INTEGER_TYPE || TREE_CODE (shorter_type) == BOOLEAN_TYPE) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 89353a7..be29996 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2008-04-08 Richard Guenther <rguenther@suse.de> + + * gcc.c-torture/execute/20080408-1.c: New testcase. + 2008-04-08 Eric Botcazou <ebotcazou@adacore.com> * gnat.dg/pack6.adb: New test. diff --git a/gcc/testsuite/gcc.c-torture/execute/20080408-1.c b/gcc/testsuite/gcc.c-torture/execute/20080408-1.c new file mode 100644 index 0000000..9e1ff63 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/20080408-1.c @@ -0,0 +1,11 @@ +extern void abort (void); +int main () +{ + short ssi = 126; + unsigned short usi = 65280; + int fail = !(ssi < usi); + if (fail) + abort (); + return 0; +} + |