[Bug c++/42070] New: FAIL: g++.dg/tree-prof/partition1.C compilation, -O3 -g -fprofile-use

["howarth at nitro dot med dot uc dot edu" <gcc-bugzilla@gcc.gnu.org>]

Currently in gcc trunk on darwin10, we fail the test cases...

FAIL: g++.dg/tree-prof/partition1.C compilation,  -g  -fprofile-use
UNRESOLVED: g++.dg/tree-prof/partition1.C execution,    -g  -fprofile-use

FAIL: g++.dg/tree-prof/partition1.C compilation,  -O3 -g  -fprofile-use
UNRESOLVED: g++.dg/tree-prof/partition1.C execution,    -O3 -g  -fprofile-use

when compiling with -freorder-blocks-and-partition on darwin10 because of many
warnings of the form...

ld: warning: can't add line info to anonymous symbol anon-func-0xF40 from
/var/tmp//ccrw73YL.o

This was filed as radar 7289379 with the two failing test cases provided as
samples of the problem. Apple's response was...

"In the sample you supplied, the warning is because there is code in the
__TEXT/__unlikely section and there is dwarf debug information that says it
part of a function.  The linker sanity checks how it broke up the .o file into
"atoms"  by checking it against the dwarf debug info.  

I think the __unlikely section should be avoided on darwin until it is shown to
work with the linker.  At a minimum each chunk in the __unlikely section should
have a label on it with a name based on the function it came from.  Those
labels would also help debugging.

This warning does not have anything to do removing labels from __eh_frame
section."


-- 
           Summary: FAIL: g++.dg/tree-prof/partition1.C compilation,  -O3 -g
                    -fprofile-use
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: howarth at nitro dot med dot uc dot edu
 GCC build triplet: *-apple-darwin10
  GCC host triplet: *-apple-darwin10
GCC target triplet: *-apple-darwin10


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42070