From 7f42f7adfa69fea029fbb76286048f712bb017ff Mon Sep 17 00:00:00 2001 From: David Malcolm Date: Tue, 4 Oct 2022 20:19:06 -0400 Subject: [PATCH] analyzer: fold -(-(VAL)) to VAL gcc/analyzer/ChangeLog: * region-model-manager.cc (region_model_manager::maybe_fold_unaryop): Fold -(-(VAL)) to VAL. Signed-off-by: David Malcolm --- gcc/analyzer/region-model-manager.cc | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/gcc/analyzer/region-model-manager.cc b/gcc/analyzer/region-model-manager.cc index ed5b9c759101..1956cfc3e8d9 100644 --- a/gcc/analyzer/region-model-manager.cc +++ b/gcc/analyzer/region-model-manager.cc @@ -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. */ -- 2.47.2