diff mbox series

[2/3] Release expanded template argument vector

Message ID 20241002115039.4DE0B386544E@sourceware.org
State New
Headers show
Series [1/3] Speedup iterative_hash_template_arg | expand

Commit Message

Richard Biener Oct. 2, 2024, 11:50 a.m. UTC 
This reduces peak memory usage by 20% for a specific testcase.

Bootstrapped and tested on x86_64-unknown-linux-gnu.

It's very ugly so I'd appreciate suggestions on how to handle such
situations better?

gcc/cp/
	* pt.cc (coerce_template_parms): Release expanded argument
	vector when not needed.
---
 gcc/cp/pt.cc | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc
index 04f0a1d5fff..2c8b0d8609d 100644
--- a/gcc/cp/pt.cc
+++ b/gcc/cp/pt.cc
@@ -9442,6 +9442,9 @@  coerce_template_parms (tree parms,
     SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT (new_inner_args,
 					 TREE_VEC_LENGTH (new_inner_args));
 
+  if ((return_full_args ? new_args != inner_args : new_inner_args != inner_args)
+      && inner_args != orig_inner_args)
+    ggc_free (inner_args);
   return return_full_args ? new_args : new_inner_args;
 }