[committed] analyzer: fold -(-(VAL)) to VAL
Commit Message
Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.
Pushed to trunk as r13-3075-g7f42f7adfa69fe.
gcc/analyzer/ChangeLog:
* region-model-manager.cc
(region_model_manager::maybe_fold_unaryop): Fold -(-(VAL)) to VAL.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
---
gcc/analyzer/region-model-manager.cc | 11 +++++++++++
1 file changed, 11 insertions(+)
@@ -432,6 +432,17 @@ region_model_manager::maybe_fold_unaryop (tree type, enum tree_code op,
}
}
break;
+ case NEGATE_EXPR:
+ {
+ /* -(-(VAL)) is VAL, for integer types. */
+ if (const unaryop_svalue *unaryop = arg->dyn_cast_unaryop_svalue ())
+ if (unaryop->get_op () == NEGATE_EXPR
+ && type == unaryop->get_type ()
+ && type
+ && INTEGRAL_TYPE_P (type))
+ return unaryop->get_arg ();
+ }
+ break;
}
/* Constants. */