https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98604
Bug ID: 98604
Summary: Passing constexpr by const reference causes excessive
memory usage during compilation
Product: gcc
Version: 9.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: adamkzyzik at gmail dot com
Target Milestone: ---
Created attachment 49922
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49922&action=edit
code
https://stackoverflow.com/questions/65621617/huge-memory-consumption-during-compilation-when-passing-constexpr-by-const-refer
Seems like passing constexpr object to a constexpr constructor by const
reference causes excessive memory footprint during compilation.
The more that object is used in the constructor, the more memory is consumed.
g++ (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
I tested it on few other versions and the behavior was the same.
It doesn't occur on clang-10.
