[Bug target/34995] New: [4.3 regression] MIPS16 ICE in gcc.c-torture/compile/pr34856.c

["rsandifo at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

When compiled with -O3 -mips16 -EL -mabi=o64 -funroll-loops,
gcc.c-torture/compile/pr34856.c ICEs with:

pr34856.c:16: error: insn does not satisfy its constraints:
(insn 47 44 278 2
/scratch/richard/gcc/HEAD/gcc/gcc/testsuite/gcc.c-torture/compile/pr34856.c:12
(set (reg:DI 2 $2)
        (zero_extend:DI (mem/u/c/i:SI (symbol_ref/u:SI ("*$LC1") [flags 0x2])
[4 S4 A32]))) 141 {zero_extendsidi2} (expr_list:REG_EQUIV (zero_extend:DI
(const:SI (plus:SI (symbol_ref:SI ("g") [flags 0x40] <var_decl 0x2b7ad7741280
g>)
                    (const_int 32 [0x20]))))
        (nil)))
pr34856.c:16: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:395

While the mode of the failure itself is not new, this particular
testcase compiles fine with 4.2.


-- 
           Summary: [4.3 regression] MIPS16 ICE in gcc.c-
                    torture/compile/pr34856.c
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        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=34995