The attached C++ program triggers an assertion violation when compiled with -O2
(it should not).
The assertion is not triggered when adding -fno-strict-aliasing, or when
removing
-O2. It is also working when slight changes to the program are made (see
comments
in the source). It is the smallest version of the program which allowed me to
reproduce the bug, but I did not try to look into the <vector> header.
It might be an aliasing bug in <vector>, I don't know.
Note that g++ 3.4 works fine.
--
Summary: Aliasing optimisation bug
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: critical
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sylvain dot pion at sophia dot inria dot fr
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19786
