[Bug target/47551] New: ICE when reloading neon registers from out-of-range offsets

[richard.sandiford at linaro dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47551

           Summary: ICE when reloading neon registers from out-of-range
                    offsets
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: richard.sandif...@linaro.org


The ref_vldX.c test from:

http://gitorious.org/arm-neon-tests/arm-neon-tests

fails when compiled with -O0 -marm:

(insn 1817 1816 1818 2
/home/export/usr/gcc-linaro/H-x86_64-unknown-linux-gnu/bin/../lib/gcc/arm-linux-gnueabi/4.5.2/include/arm_neon.h:921
5 (parallel [
            (set (reg:CI 303 [ D.14795 ])
                (unspec:CI [
                        (mem:CI (reg:SI 3 r3 [1023]) [0 S48 A64])
                        (reg:CI 303 [ D.14795 ])
                        (unspec:V8HI [
                                (const_int 0 [0x0])
                            ] 191)
                    ] 106))
            (set (reg:SI 3 r3 [1023])
                (plus:SI (reg:SI 3 r3 [1023])
                    (const_int 24 [0x18])))
        ]) 1614 {neon_vld3qav8hi} (nil))
ref_vldX.c:157: confused by earlier errors, bailing out

This is due to a bug in the ARM secondary_reload code.