[Compiler-rt][PATCH] Fix MSVC compilation of lib/profile/InstrProfData.inc

[Johan Engelen via llvm-commits]

Hi all,
  Here is another patch to fix building compiler-rt/lib/profile with MSVC.

MSVC does not do pointer math on void* (InstrProfilingPlatformOther.c lines
37 and 39), and so the types of NamePtr and CounterPtr should be mentioned
explicitly.
Is there a reason why "IntPtrT" was used instead of specifying the types as
is done in this patch? The LLVM calls (getInt8PtrTy) also explicitly
contain the type size.

With this patch, trunk works with MSVC, with these two remaining issues:
1. GCDAProfiling.c does not compile, because it includes <sys/mman.h> and
<sys/file.h> that are not available with MSVC.
2. COMPILER_RT_HAS_ATOMICS should not be 1 for MSVC. Unfortunately, MSVC
does not have a drop-in replacement for GCC's __sync_bool_compare_and_swap,
and so a fix is non-trivial.

Thanks,
  Johan
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