[COMMITTED 117/220] gccrs: reconstruct_vec: Allocate size when creating the vector

[arthur . cohen]

From: Arthur Cohen <arthur.co...@embecosm.com>

gcc/rust/ChangeLog:

        * ast/rust-ast.h (reconstruct_vec): Pre-allocate size of vector.
---
 gcc/rust/ast/rust-ast.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/rust/ast/rust-ast.h b/gcc/rust/ast/rust-ast.h
index ecbc2918130..0d853e744c7 100644
--- a/gcc/rust/ast/rust-ast.h
+++ b/gcc/rust/ast/rust-ast.h
@@ -107,6 +107,7 @@ std::vector<std::unique_ptr<T>>
 reconstruct_vec (const std::vector<std::unique_ptr<T>> &to_reconstruct)
 {
   std::vector<std::unique_ptr<T>> reconstructed;
+  reconstructed.reserve (to_reconstruct.size ());
 
   for (const auto &elt : to_reconstruct)
     reconstructed.emplace_back (std::unique_ptr<T> (elt->reconstruct_impl ()));
-- 
2.49.0