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C++ PR 54197: lifetime of reference not properly extended

From: Ollie Wild <aaw at google dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, Jason Merrill <jason at redhat dot com>
Cc: Paul Pluzhnikov <ppluzhnikov at google dot com>
Date: Mon, 13 Aug 2012 15:47:43 -0500
Subject: C++ PR 54197: lifetime of reference not properly extended

This patch fixes http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54197.

Certain constructs (see bug for examples) cause C++ references to be
initialized with COMPOUND_EXPR's.  The old logic was ignoring these,
causing those temporaries to be prematurely destroyed.

Tested on trunk via full x86_64 bootstrap and testsuite.

Okay for trunk and backport to gcc-4_7-branch?

Ollie


2012-08-13  Ollie Wild  <aaw@google.com>

        PR c++/54197
        * gcc/cp/call.c (extend_ref_init_temps_1): Handle COMPOUND_EXPR trees.
        * gcc/testsuite/g++.dg/init/lifetime3.C: New test.

Attachment: patch.txt
Description: Text document

Follow-Ups:
- Re: C++ PR 54197: lifetime of reference not properly extended
  - From: Jakub Jelinek

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