[Bug optimization/14815] New: -frename-registers produces incorrect code on ia64

[jbutler at broad dot mit dot edu]

The attached code (IsWeirdness.{cc,i}) produces the correct result when compiled
with -O2 -finline-functions on ia64 and with -O3 on alpha, but produces the
incorrect result with -O3 on ia64, which leads me to the conclusion that
something's gone all funny with -frename-registers on ia64.

The code is a bit nonsensical, as I've reduced it as much as possible while
preserving the incorrect behavior, but it should print the number "-764".  With
-O3 on ia64, it prints "-528".

-- 
           Summary: -frename-registers produces incorrect code on ia64
           Product: gcc
           Version: 3.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jbutler at broad dot mit dot edu
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: ia64-unknown-linux
  GCC host triplet: ia64-unknown-linux
GCC target triplet: ia64-unknown-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14815