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[Bug target/65249] New: unable to find a register to spill in class 'R0_REGS' when compiling protobuf on sh4


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65249

            Bug ID: 65249
           Summary: unable to find a register to spill in class 'R0_REGS'
                    when compiling protobuf on sh4
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: glaubitz at physik dot fu-berlin.de
            Target: sh*-*-*

Hello!

Here's another package that previously successfully built on Debian sh4 and now
fails with an apparent compiler error:

/bin/bash ../libtool  --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I. -I..  
-D_FORTIFY_SOURCE=2 -pthread -Wall -Wwrite-strings -Woverloaded-virtual
-Wno-sign-compare  -g -O2 -fstack-protector-strong -Wformat
-Werror=format-security -c -o google/protobuf/descriptor.pb.lo
google/protobuf/descriptor.pb.cc
libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I.. -D_FORTIFY_SOURCE=2 -pthread
-Wall -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -g -O2
-fstack-protector-strong -Wformat -Werror=format-security -c
google/protobuf/descriptor.pb.cc  -fPIC -DPIC -o
google/protobuf/.libs/descriptor.pb.o
google/protobuf/descriptor.pb.cc: In member function 'virtual
google::protobuf::Metadata
google::protobuf::OneofDescriptorProto::GetMetadata() const':
google/protobuf/descriptor.pb.cc:3448:1: error: unable to find a register to
spill in class 'R0_REGS'
 }
 ^
google/protobuf/descriptor.pb.cc:3448:1: error: this is the insn:
(insn 102 127 85 7 (set (reg:SI 1 r1 [+4 ])
        (mem/f/c:SI (plus:SI (reg/f:SI 1 r1 [197])
                (reg:SI 12 r12)) [5 OneofDescriptorProto_reflection_+0 S4
A32])) google/protobuf/descriptor.pb.cc:3448 257 {movsi_ie}
     (expr_list:REG_DEAD (reg/f:SI 1 r1 [197])
        (nil)))
google/protobuf/descriptor.pb.cc:3448: confused by earlier errors, bailing out
Preprocessed source stored into /tmp/ccdkVmsq.out file, please attach this to
your bugreport.

Build log here [1], precompiled source attached.

Cheers,

Adrian

> [1] http://buildd.debian-ports.org/status/fetch.php?pkg=protobuf&arch=sh4&ver=2.6.1-1&stamp=1425065627


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