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Subject: [Bug d/101273] d: missed RVO optimization with non-pod structs
Date: Sat, 03 Jul 2021 11:08:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101273

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Iain Buclaw <ibuclaw@gcc.gnu.org>:

https://gcc.gnu.org/g:152f4d0e4d3b524ce30d05f20e23a44b0dd29765

commit r12-1995-g152f4d0e4d3b524ce30d05f20e23a44b0dd29765
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date:   Sat Jul 3 02:42:14 2021 +0200

    d: Missed RVO optimization with non-POD structs

    The D front-end semantic pass sometimes declares a temporary inside a
    return expression.  This is now detected with the RESULT_DECL replacing
    the temporary, allowing for RVO to be done.

            PR d/101273

    gcc/d/ChangeLog:

            * toir.cc (IRVisitor::visit (ReturnStatement *)): Detect returns
that
            use a temporary, and replace with return value.

    gcc/testsuite/ChangeLog:

            * gdc.dg/torture/pr101273.d: New test.=