[Bug c/52794] gcc.dg/tree-prof/pr52027.c fails on x86_64/i386-apple-darwin*

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52794

--- Comment #1 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-03-30 19:22:23 UTC ---
Created attachment 27046
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27046
testcase from radar://10960042  generated on x86_64-apple-darwin11

The FSF gcc testsuite failure...

FAIL: gcc.dg/tree-prof/pr52027.c compilation,  -fprofile-use -D_PROFILE_USE
UNRESOLVED: gcc.dg/tree-prof/pr52027.c execution,    -fprofile-use
-D_PROFILE_USE

seen at -m32/-m64 with Xcode 4.3's linker may be showing a linker bug. The
attached
testcase contains the files obtained with...

/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/gcc/xgcc
-B/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/gcc/
/sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120228/gcc/testsuite/gcc.dg/tree-prof/pr52027.c
-O -freorder-blocks-and-partition -fno-reorder-functions -fprofile-generate
-D_PROFILE_GENERATE -lm -m64 -o pr52027.x01

Executing the resulting pr52027.x01 to produce the profiling code in
pr52027.gcda (provided) and...

/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/gcc/xgcc
-B/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/gcc/
/sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120228/gcc/testsuite/gcc.dg/tree-prof/pr52027.c
-O -freorder-blocks-and-partition -fno-reorder-functions -fprofile-use
-D_PROFILE_USE -lm -m64 -v --save-temps -o pr52027.x02

which produces the linker error...

Assertion failed: (cfiStartsArray[i] != cfiStartsArray[i-1]), function parse,
file /SourceCache/ld64/ld64-128.2/src/ld/parsers/macho_relocatable_file.cpp,
line 1519.
0  0x1010331df  __assert_rtn + 79
1  0x10104eae5 
mach_o::relocatable::Parser<x86_64>::parse(mach_o::relocatable::ParserOptions
const&) + 917
2  0x10103c32e  mach_o::relocatable::Parser<x86_64>::parse(unsigned char
const*, unsigned long long, char const*, long, unsigned int,
mach_o::relocatable::ParserOptions const&) + 286
3  0x101038b2b  mach_o::relocatable::parse(unsigned char const*, unsigned long
long, char const*, long, unsigned int, mach_o::relocatable::ParserOptions
const&) + 91
4  0x1010716fd  ld::tool::InputFiles::makeFile(Options::FileInfo const&, bool)
+ 653
5  0x101072cfb  ld::tool::InputFiles::InputFiles(Options&, char const**) + 651
6  0x101033426  main + 358
7  0x1010236a4  start + 52

which can be reproduced with the provided bad_link shell script which
executes...

ld -dynamic -arch x86_64 -macosx_version_min 10.7.3 -weak_reference_mismatches
non-weak -o pr52027.x02 -lcrt1.10.6.o -L. pr52027.o -no_compact_unwind -lSystem
-lgcc_ext.10.5 -lgcc -lSystem -v