[Bug tree-optimization/29877] New: Tree optimization extends variable life of variable beyond original declared

[diego dot dompe at ridgerun dot com]

There is a bug on the tree optimization code generated by gcc that produces
corruption of variables on some corner cases of code generated by Linux kernel
for ARM. I originally found the bug on codesourcery releases but was able to
reproduced it on gcc 4.1 that I builded.

Detailed explanation and some insights from codesourcery guys can be found at
this mail thread:

http://www.codesourcery.com/archives/arm-gnu/msg00961.html

The example code that triggers the bug is found there too.


-- 
           Summary: Tree optimization extends variable life of variable
                    beyond original declared
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: diego dot dompe at ridgerun dot com
 GCC build triplet: x86_64-pc-linux-gnu
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: arm-linux-uclibcgnueabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29877