eraman added a comment.

I have reverted the commit in r255416 because the test failed in many 
architectures. In many cases the linker is not able to find 
libclang_rt.profile-$ARCH.a file. There are also other errors. Here is one:

0.      Program arguments: 
/var/lib/buildbot/slaves/hexagon-build-03/clang-hexagon-elf/llvm.obj/Release+Asserts/bin/clang
 -cc1 -triple hexagon-unknown--elf -emit-obj -disable-free -main-file-name 
pgo-max-function-count.c -mrelocation-model static -mthread-model posix 
-mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -target-cpu 
hexagonv4 -mqdsp6-compat -Wreturn-type -fshort-enums -mllvm 
-machine-sink-split=0 -target-linker-version 2.25 -dwarf-column-info 
-fprofile-instr-generate -resource-dir 
/var/lib/buildbot/slaves/hexagon-build-03/clang-hexagon-elf/llvm.obj/Release+Asserts/bin/../lib/clang/3.8.0
 -internal-externc-isystem 
/var/lib/buildbot/slaves/hexagon-build-03/clang-hexagon-elf/llvm.obj/Release+Asserts/bin/../../gnu/lib/gcc/hexagon/0.0.0/include
 -internal-externc-isystem 
/var/lib/buildbot/slaves/hexagon-build-03/clang-hexagon-elf/llvm.obj/Release+Asserts/bin/../../gnu/lib/gcc/hexagon/0.0.0/include-fixed
 -internal-externc-isystem 
/var/lib/buildbot/slaves/hexagon-build-03/clang-hexagon-elf/llvm.obj/Release+Asserts/bin/../../gnu/hexagon/include
 -O2 -fdebug-compilation-dir 
/var/lib/buildbot/slaves/hexagon-build-03/clang-hexagon-elf/llvm.obj/tools/clang/test/CodeGen
 -ferror-limit 19 -fmessage-length 0 -fshort-enums -fno-signed-char 
-fno-use-cxa-atexit -fobjc-runtime=gcc -fdiagnostics-show-option 
-vectorize-loops -vectorize-slp -o /tmp/pgo-max-function-count-816195.o -x c 
/var/lib/buildbot/slaves/hexagon-build-03/clang-hexagon-elf/llvm.src/tools/clang/test/CodeGen/pgo-max-function-count.c

<snip>

Target: hexagon-unknown--elf

Seems like the command line is messed up (I assume there should be a space 
between hexagon-unknown and --elf).

Any suggestions on how to fix this test case? AFAICT, there are no PGO related 
tests in clang and I based this on PGO tests in compiler-rt/


Repository:
  rL LLVM

http://reviews.llvm.org/D15163



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