[Bug target/27959] New: s390x miscompilation due to clobbering literal pool base reg

[jakub at gcc dot gnu dot org]

The testcase I'll attach is miscompiled on s390x with -m64 -O2 -mtune=z990
or -m64 -O2 -mtune=z9-109.
The test function needs a base reg (so %r13 is loaded early and during flow2
the %r13 references actually make it into the assembler).  But, during reload
a TImode pseudo is reloaded into TI %r12 (and therefore clobbers %r13 too)
and the testcase segfaults.


-- 
           Summary: s390x miscompilation due to clobbering literal pool base
                    reg
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org
GCC target triplet: s390x-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27959