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| author | Roger Sayle <roger@eyesopen.com> | 2004-03-26 01:20:46 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2004-03-26 01:20:46 +0000 |
| commit | 22e63bd346c056fb94086e0797eda465fbe7a7ac (patch) | |
| tree | 7510169a1bc588abe4ab5952f12329311706b5b7 /gcc | |
| parent | 0066ef9ce4ea5377b154cdc10ef6626033ede8b8 (diff) | |
| download | gcc-22e63bd346c056fb94086e0797eda465fbe7a7ac.zip gcc-22e63bd346c056fb94086e0797eda465fbe7a7ac.tar.gz gcc-22e63bd346c056fb94086e0797eda465fbe7a7ac.tar.bz2 | |
fold-const.c (tree_expr_nonnegative_p): Handle BIT_XOR_EXPR like BIT_IOR_EXPR...
* fold-const.c (tree_expr_nonnegative_p): Handle BIT_XOR_EXPR like
BIT_IOR_EXPR; A^B is nonnegative when A and B are nonnegative.
* gcc.dg/compare8.c: Add an additional test for XOR.
From-SVN: r79979
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/compare8.c | 6 |
4 files changed, 16 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c06551f..c56fb86 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2004-03-25 Roger Sayle <roger@eyesopen.com> + + * fold-const.c (tree_expr_nonnegative_p): Handle BIT_XOR_EXPR like + BIT_IOR_EXPR; A^B is nonnegative when A and B are nonnegative. + 2004-03-25 Richard Henderson <rth@redhat.com> PR 11527 diff --git a/gcc/fold-const.c b/gcc/fold-const.c index e8c36f0..7fbbc8e 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -8722,6 +8722,7 @@ tree_expr_nonnegative_p (tree t) return tree_expr_nonnegative_p (TREE_OPERAND (t, 1)) || tree_expr_nonnegative_p (TREE_OPERAND (t, 0)); case BIT_IOR_EXPR: + case BIT_XOR_EXPR: return tree_expr_nonnegative_p (TREE_OPERAND (t, 0)) && tree_expr_nonnegative_p (TREE_OPERAND (t, 1)); diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index f16de2b..208a55f 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2004-03-25 Roger Sayle <roger@eyesopen.com> + + * gcc.dg/compare8.c: Add an additional test for XOR. + 2004-03-25 Kaveh R. Ghazi <ghazi@caip.rutgers.edu> * gcc.dg/torture/builtin-ctype-1.c: New test. diff --git a/gcc/testsuite/gcc.dg/compare8.c b/gcc/testsuite/gcc.dg/compare8.c index 6d04085..d723c45 100644 --- a/gcc/testsuite/gcc.dg/compare8.c +++ b/gcc/testsuite/gcc.dg/compare8.c @@ -13,3 +13,9 @@ g(unsigned short a1, unsigned short a2, unsigned int b) return ((a1+a2)&5) > b ? 2 : 3; /* { dg-bogus "signed and unsigned" } */ } +int +h(unsigned short a1, unsigned short a2, unsigned int b) +{ + return ((a1+a2)^5) > b ? 2 : 3; /* { dg-bogus "signed and unsigned" } */ +} + |