[Bug tree-optimization/60006] New: [4.9 Regression] FAIL: c-c++-common/cilk-plus/CK/fib_no_(return|sync).c -O3 with -m32 after r207231 on x86_64-apple-darwin13

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60006

            Bug ID: 60006
           Summary: [4.9 Regression] FAIL:
                    c-c++-common/cilk-plus/CK/fib_no_(return|sync).c  -O3
                    with -m32 after r207231 on x86_64-apple-darwin13
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
                CC: iains at gcc dot gnu.org, jakub at gcc dot gnu.org
              Host: x86_64-apple-darwin13
            Target: x86_64-apple-darwin13
             Build: x86_64-apple-darwin13

After r207231 the following tests fail on x86_64-apple-darwin13 with -m32

FAIL: c-c++-common/cilk-plus/CK/fib_no_return.c  -O3 (test for excess errors)
UNRESOLVED: c-c++-common/cilk-plus/CK/fib_no_return.c  -O3 compilation failed
to produce executable
FAIL: c-c++-common/cilk-plus/CK/fib_no_sync.c  -O3 (test for excess errors)
UNRESOLVED: c-c++-common/cilk-plus/CK/fib_no_sync.c  -O3 compilation failed to
produce executable
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c  -O2 -flto  execution test
FAIL: c-c++-common/cilk-plus/CK/fib_no_return.c  -O3 -g  (test for excess
errors)
UNRESOLVED: c-c++-common/cilk-plus/CK/fib_no_return.c  -O3 -g  compilation
failed to produce executable
FAIL: c-c++-common/cilk-plus/CK/fib_no_sync.c  -O3 -g  (test for excess errors)
UNRESOLVED: c-c++-common/cilk-plus/CK/fib_no_sync.c  -O3 -g  compilation failed
to produce executable
FAIL: c-c++-common/cilk-plus/CK/fib_no_return.c  -O3 -flto -g  (test for excess
errors)
UNRESOLVED: c-c++-common/cilk-plus/CK/fib_no_return.c  -O3 -flto -g 
compilation failed to produce executable
FAIL: c-c++-common/cilk-plus/CK/fib_no_sync.c  -O3 -flto -g  (test for excess
errors)
UNRESOLVED: c-c++-common/cilk-plus/CK/fib_no_sync.c  -O3 -flto -g  compilation
failed to produce executable

The failures are of the kind

/var/folders/8q/sh_swgz96r7f5vnn08f7fxr00000gn/T//ccE8IAa2.s:856:FATAL:Symbol
L2$pb already defined.

The failures need -O3, but not -g nor -flto, and r207230 is OK.