[Bug rtl-optimization/38595] New: gcc.target/mips/mips16e-extends.c fails for -mlong64

[rsandifo at gcc dot gnu dot org]

mipsisa64-elf-gcc -O2 -S gcc.target/mips/mips16e-extends.c
-DMIPS16='__attribute__((mips16))' -msoftf-float

The output code does not contain the expected ZEB and ZEH instructions.  (The
options here select EABI64, but the same problem occurs with other -mlong64
ABIs.)

The problem is that we don't have MIPS16e equivalents of the non-MIPS16
extend-truncate combiner patterns.

I'm filing this for 4.5 or later; it isn't something we'd fix in 4,4 or
earlier.


-- 
           Summary: gcc.target/mips/mips16e-extends.c fails for -mlong64
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rsandifo at gcc dot gnu dot org
GCC target triplet: mipsisa64-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38595