From: Siddhesh Poyarekar <siddhesh@gotplt.org>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH] tree-object-size: Avoid unnecessary processing of __builtin_object_size
Date: Mon, 18 Oct 2021 09:54:38 +0530 [thread overview]
Message-ID: <20211018042438.803964-1-siddhesh@gotplt.org> (raw)
This is a minor cleanup to bail out early if the result of
__builtin_object_size is not assigned to anything and avoid initializing
the object size arrays.
gcc/ChangeLog:
* tree-object-size (object_sizes_execute): Consolidate LHS null
check and do it early.
Signed-off-by: Siddhesh Poyarekar <siddhesh@gotplt.org>
---
gcc/tree-object-size.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/gcc/tree-object-size.c b/gcc/tree-object-size.c
index 6a4dc724f34..46a976dfe10 100644
--- a/gcc/tree-object-size.c
+++ b/gcc/tree-object-size.c
@@ -1298,6 +1298,10 @@ object_sizes_execute (function *fun, bool insert_min_max_p)
if (!gimple_call_builtin_p (call, BUILT_IN_OBJECT_SIZE))
continue;
+ tree lhs = gimple_call_lhs (call);
+ if (!lhs)
+ continue;
+
init_object_sizes ();
/* If insert_min_max_p, only attempt to fold
@@ -1312,11 +1316,9 @@ object_sizes_execute (function *fun, bool insert_min_max_p)
{
unsigned HOST_WIDE_INT object_size_type = tree_to_uhwi (ost);
tree ptr = gimple_call_arg (call, 0);
- tree lhs = gimple_call_lhs (call);
if ((object_size_type == 1 || object_size_type == 3)
&& (TREE_CODE (ptr) == ADDR_EXPR
- || TREE_CODE (ptr) == SSA_NAME)
- && lhs)
+ || TREE_CODE (ptr) == SSA_NAME))
{
tree type = TREE_TYPE (lhs);
unsigned HOST_WIDE_INT bytes;
@@ -1339,10 +1341,6 @@ object_sizes_execute (function *fun, bool insert_min_max_p)
continue;
}
- tree lhs = gimple_call_lhs (call);
- if (!lhs)
- continue;
-
result = gimple_fold_stmt_to_constant (call, do_valueize);
if (!result)
{
--
2.31.1
next reply other threads:[~2021-10-18 4:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-18 4:24 Siddhesh Poyarekar [this message]
2021-10-18 9:57 ` Richard Biener
2021-10-18 10:12 ` Jakub Jelinek
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