[Bug target/48572] New: [4.7 regression] gcc.target/mips/mips-{3d,ps}-?.c tests ICE on IRIX 6.5

[ro at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48572

           Summary: [4.7 regression] gcc.target/mips/mips-{3d,ps}-?.c
                    tests ICE on IRIX 6.5
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ro@gcc.gnu.org
                CC: richard.sandiford@linaro.org
              Host: mips-sgi-irix6.5
            Target: mips-sgi-irix6.5
             Build: mips-sgi-irix6.5


Between 20110322 and 20110401,several mips-3d-?.c and mips-ps-?.c tests started
to fail on IRIX 6.5, e.g.

Downgraded to a 'link' test due to unsupported option '-mips3d'
Downgraded to an 'assemble' test due to incompatible arch option (-march=mips3
changed to -mips64)
Executing on host: /var/gcc/regression/trunk/6.5-gcc/build/gcc/xgcc
-B/var/gcc/regression/trunk/6.5-gcc/build/gcc/  
-DNOMIPS16=__attribute__((nomips16)) -mips64 -mhard-float -mfp64 -mips3d -O2
-mpaired-single -c  -o mips-3d-1.o
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips-3d-1.c   
(timeout = 600)
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips-3d-1.c: In
function 'main':

/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips-3d-1.c:127:1:
error: unable to find a register to spill in class 'GR_REGS'

/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips-3d-1.c:127:1:
error: this is the insn:

(insn 26 6 28 2 (set (reg:CCV2 253)

        (unspec:CCV2 [

                (reg/v:V2SF 34 $f2 [orig:197 c ] [197])

                (reg/v:V2SF 35 $f3 [orig:194 d ] [194])

                (const_int 2 [0x2])

            ] UNSPEC_C))
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips-3d-1.c:31 677
{mips_c_cond_ps}

     (expr_list:REG_DEAD (reg/v:V2SF 34 $f2 [orig:197 c ] [197])

        (expr_list:REG_DEAD (reg/v:V2SF 35 $f3 [orig:194 d ] [194])

            (expr_list:REG_EQUAL (unspec:CCV2 [

                        (reg/v:V2SF 34 $f2 [orig:197 c ] [197])

                        (const_vector:V2SF [

                                (const_double:SF 4.6e+1 [0x0.b8p+6])

                                (const_double:SF 1.12e+2 [0x0.ep+7])

                            ])

                        (const_int 2 [0x2])

                    ] UNSPEC_C)

                (nil)))))

/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips-3d-1.c:127:1:
internal compiler error: in spill_failure, at reload1.c:2113

This is a regression from 4.6.