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* [binutils-gdb] Avoid extra allocations in block
@ 2023-02-19 23:37 Tom Tromey
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From: Tom Tromey @ 2023-02-19 23:37 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f52688890edd7c587ec11cf1d565f235e41a6c43
commit f52688890edd7c587ec11cf1d565f235e41a6c43
Author: Tom Tromey <tom@tromey.com>
Date: Mon Jan 16 17:04:39 2023 -0700
Avoid extra allocations in block
block_set_scope and block_set_using unconditionally allocate the block
namespace object. However, this isn't truly needed, so arrange to
only allocate when it is.
Diff:
---
gdb/block.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/gdb/block.c b/gdb/block.c
index 751f67d30f7..f24a2b5d084 100644
--- a/gdb/block.c
+++ b/gdb/block.c
@@ -320,6 +320,12 @@ void
block_set_scope (struct block *block, const char *scope,
struct obstack *obstack)
{
+ if (scope == nullptr || scope[0] == '\0')
+ {
+ /* Don't bother. */
+ return;
+ }
+
block_initialize_namespace (block, obstack);
block->namespace_info ()->scope = scope;
@@ -346,6 +352,12 @@ block_set_using (struct block *block,
struct using_direct *using_decl,
struct obstack *obstack)
{
+ if (using_decl == nullptr)
+ {
+ /* Don't bother. */
+ return;
+ }
+
block_initialize_namespace (block, obstack);
block->namespace_info ()->using_decl = using_decl;
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