[Bug target/36780] New: [4.3/4.4 Regression] Wrong reload generated for subreg address on SH

[kkojima at gcc dot gnu dot org]

For trunk and 4.3-branch, bootstrapping on SH fails during building
libstdc++-v3

/exp/ldroot/dodes/xsh-gcc-orig/sh4-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:559:
error: insn does not satisfy its constraints:
(insn 2055 2054 716 106
/exp/ldroot/dodes/xsh-gcc-orig/sh4-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:473
(set (reg:SI 2 r2)
        (plus:SI (reg:SI 3 r3)
            (const_int 40 [0x28]))) 35 {*addsi3_compact} (nil))
/exp/ldroot/dodes/xsh-gcc-orig/sh4-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:559:
internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

It starts to fail after the patch

r137639 | jsm28 | 2008-07-09 05:23:56 +0900 (Wed, 09 Jul 2008) | 3 lines

        * reload.c (find_reloads_subreg_address): Do not require validity
        of address in original mode before reloading address.

is applied.


-- 
           Summary: [4.3/4.4 Regression] Wrong reload generated for subreg
                    address on SH
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, build
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kkojima at gcc dot gnu dot org
GCC target triplet: sh-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36780