[Bug tree-optimization/53708] New: [4.8 Regression] Many failures of the objc tests with -O3 -fnext-runtime and -m32

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53708

             Bug #: 53708
           Summary: [4.8 Regression] Many failures of the objc tests with
                    -O3 -fnext-runtime and -m32
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dominiq@lps.ens.fr
                CC: iains@gcc.gnu.org, rguenth@gcc.gnu.org
              Host: *-apple-darwin*
            Target: *-apple-darwin*
             Build: *-apple-darwin*


Between revisions 188187 (OK) and 188246 over one hundred tests failed with
-m32 and -O3 -fnext-runtime on *-apple-darwin*:

Running target unix/-m32
FAIL: objc/execute/exceptions/catchall-1.m compilation,  -O3
-fomit-frame-pointer -fnext-runtime
UNRESOLVED: objc/execute/exceptions/catchall-1.m execution,  -O3
-fomit-frame-pointer -fnext-runtime
FAIL: objc/execute/exceptions/catchall-1.m compilation,  -O3 -g -fnext-runtime
UNRESOLVED: objc/execute/exceptions/catchall-1.m execution,  -O3 -g
-fnext-runtime
FAIL: objc/execute/exceptions/finally-1.m compilation,  -O3
-fomit-frame-pointer -fnext-runtime
UNRESOLVED: objc/execute/exceptions/finally-1.m execution,  -O3
-fomit-frame-pointer -fnext-runtime
FAIL: objc/execute/exceptions/finally-1.m compilation,  -O3 -g -fnext-runtime
...
FAIL: objc.dg/torture/tls/thr-init-3.m  -O3 -fomit-frame-pointer 
-fnext-runtime (test for excess errors)
WARNING: objc.dg/torture/tls/thr-init-3.m  -O3 -fomit-frame-pointer 
-fnext-runtime compilation failed to produce executable
FAIL: objc.dg/torture/tls/thr-init-3.m  -O3 -g  -fnext-runtime (test for excess
errors)
WARNING: objc.dg/torture/tls/thr-init-3.m  -O3 -g  -fnext-runtime compilation
failed to produce executable

        === objc Summary for unix/-m32 ===

# of expected passes        5891
# of unexpected failures    104
# of expected failures        6
# of unresolved testcases    92
# of unsupported tests        85

On x86_64-apple-darwin10 I also see the following failures with -m64

Running target unix/-m64
FAIL: objc/execute/formal_protocol-4.m compilation,  -O3 -fomit-frame-pointer
-fnext-runtime
UNRESOLVED: objc/execute/formal_protocol-4.m execution,  -O3
-fomit-frame-pointer -fnext-runtime
FAIL: objc/execute/formal_protocol-4.m compilation,  -O3 -g -fnext-runtime
UNRESOLVED: objc/execute/formal_protocol-4.m execution,  -O3 -g -fnext-runtime
FAIL: objc/execute/protocol-isEqual-2.m execution,  -O3 -fomit-frame-pointer
-fnext-runtime
FAIL: objc/execute/protocol-isEqual-2.m execution,  -O3 -g -fnext-runtime

        === objc Summary for unix/-m64 ===

# of expected passes        6045
# of unexpected failures    4
# of expected failures        14
# of unresolved testcases    2
# of unsupported tests        91

while on powerpc-apple-darwin9 I only see the execution failures. The
compilation failures are all of the kind

ld: in /var/tmp//ccVsf9ME.o, S_LITERAL_POINTERS section __OBJC,__message_refs
missing relocs
collect2: error: ld returned 1 exit status

They disappear if I compile the tests with '-O3 -fno-tree-vectorize', but
reappear with '-O2 -ftree-vectorize'.

According to Iain Sandoe, this is due to revisions 188235/188243.