[Bug c++/43874] New: gcc should warn when 'new' is used on type with alignof greater than 2*sizeof(void*)

Fri, 23 Apr 2010 14:34:18 -0700 

See

https://wwws.clamav.net/bugzilla/show_bug.cgi?id=1984
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15795
http://sourceware.org/bugzilla/show_bug.cgi?id=206

When __alignof(type) is 16 on a 32-bit system, and 'new' returns only 8-byte
aligned memory, -ftree-vectorize can cause the code to crash.

GCC should at least warn (or even error out) when __alignof(type) >
alignment_of_new/malloc.
Or it could use memalign, to fix this and avoid the crash.

Right now it just silently creates code that crashes.


-- 
           Summary: gcc should warn when 'new' is used on type with alignof
                    greater than 2*sizeof(void*)
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: edwintorok at gmail dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43874

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