[PATCH] D21736: [InstrProfiling] Mark __llvm_profile_instrument_target last parameter as i32 zeroext if appropriate.

[Marcin Kościelnicki via llvm-commits]

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On some architectures (s390x, ppc64, sparc64), C-level int is passed
as i32 signext instead of plain i32 (and unsigned likewise as i32 zeroext).
Add this information to TargetLibraryInfo and use it in InstrProfiling
for __llvm_profile_instrument_target (whose last parameter is unsigned int).
This (together with the clang change) makes compiler-rt profile testsuite pass
on s390x.

There are lots of other places in LLVM that create function calls with int
parameters and/or returns that will need a similiar treatment.  If the
approach taken here is accepted, I'll fix the remaining functions.

Repository:
  rL LLVM

http://reviews.llvm.org/D21736

Files:
  include/llvm/Analysis/TargetLibraryInfo.h
  include/llvm/Transforms/InstrProfiling.h
  lib/Analysis/TargetLibraryInfo.cpp
  lib/Transforms/Instrumentation/InstrProfiling.cpp

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