diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2008-08-25 15:04:09 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2008-08-25 15:04:09 +0000 |
| commit | 2f06e1a67e8386223e650683a55ce73d4ff0212a (patch) | |
| tree | f1b02ae6b14256e8a51a0d1abb1fb752abd4ec66 | |
| parent | f7f83f3eae191199ade4c1a83b39091ffad35f8b (diff) | |
svn merge -r139093:139094 svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_3-branchredhat/gcc-4_1-branch
git-svn-id: https://gcc.gnu.org/svn/gcc/branches/redhat/gcc-4_1-branch@139561 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/fold-const.c | 4 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/20080813-1.c | 30 |
4 files changed, 43 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2d63bd5f307..e8c69a56fa9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2008-08-14 Jakub Jelinek <jakub@redhat.com> + + PR middle-end/37103 + * fold-const.c (fold_widened_comparison): Do not allow + sign changes that change the result even if shorter type + is wider than arg1_unw's type. + 2008-06-05 Richard Sandiford <rdsandiford@googlemail.com> * config/mips/mips.c (mips_emit_loadgp): Emit a blockage if diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 438820afecc..12a75ab943c 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -6311,10 +6311,8 @@ fold_widened_comparison (enum tree_code code, tree type, tree arg0, tree arg1) if ((code == EQ_EXPR || code == NE_EXPR || 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 (shorter_type) - == TYPE_PRECISION (TREE_TYPE (arg1_unw))) + >= TYPE_PRECISION (TREE_TYPE (arg1_unw))) && (TYPE_UNSIGNED (shorter_type) == TYPE_UNSIGNED (TREE_TYPE (arg1_unw)))) || (TREE_CODE (arg1_unw) == INTEGER_CST diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 54612cbdaff..a29d3db74e9 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2008-08-14 Jakub Jelinek <jakub@redhat.com> + + PR middle-end/37103 + * gcc.c-torture/execute/20080813-1.c: New test. + 2008-05-29 Eric Botcazou <ebotcazou@adacore.com> * gcc.dg/nested-func-6.c: New test. diff --git a/gcc/testsuite/gcc.c-torture/execute/20080813-1.c b/gcc/testsuite/gcc.c-torture/execute/20080813-1.c new file mode 100644 index 00000000000..9ef6bc2e2c5 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/20080813-1.c @@ -0,0 +1,30 @@ +/* PR middle-end/37103 */ + +extern void abort (void); + +void +foo (unsigned short x) +{ + signed char y = -1; + if (x == y) + abort (); +} + +void +bar (unsigned short x) +{ + unsigned char y = -1; + if (x == y) + abort (); +} + +int +main (void) +{ + if (sizeof (int) == sizeof (short)) + return 0; + foo (-1); + if (sizeof (short) > 1) + bar (-1); + return 0; +} |