[Bug tree-optimization/27299] New: gcc 4.1 produces bad code -ftree-vectorize option

[gringo at slonko dot net]

Compiling an attached test program on AMD64 using gcc-4.1.0 with '-O
-ftree-vectorize' produces a code which segfaults, eg.

[EMAIL PROTECTED] ~ $ gcc -O -ftree-vectorize test.c -o test
[EMAIL PROTECTED] ~ $ ./test
Segmentation fault

Compiling it using any -O flags doesn't produce code which segfaults, eg:

[EMAIL PROTECTED] ~ $ gcc -O3 test.c -o test
[EMAIL PROTECTED] ~ $ ./test
[EMAIL PROTECTED] ~ $

I'm using glibc-2.4-r1 (Gentoo) and kernel 2.6.16-beyond2.


-- 
           Summary: gcc 4.1 produces bad code -ftree-vectorize option
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gringo at slonko dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27299