Changes

[Attributor][Fix] Manifest nocapture only in CSArgument or Argument
Summary: We can query to Attributor whether the value is captured in the
scope or not on the following way:
```
   const auto & NoCapAA = A.getAAFor<AANoCapture>(*this,
IRPosition::value(V));
``` And if V is CallSiteReturned then `getDeducedAttribute` will add
`nocatpure` to the callsite returned value. It is not valid. This patch
checks the position is an argument or call site argument.
This is tested in D67286.
Reviewers: jdoerfert, sstefan1
Reviewed By: jdoerfert
Subscribers: hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D67342
llvm-svn: 371589

[Attributor] Implement "noalias" callsite argument deduction
Summary: Now, `nocapture` is deduced in Attributor therefore, this patch
introduces deduction for `noalias` callsite argument using `nocapture`.
Reviewers: jdoerfert, sstefan1
Reviewed By: jdoerfert
Subscribers: lebedev.ri, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D67286
llvm-svn: 371590

[llvm-objcopy] Simplify --prefix-alloc-sections
Handle --prefix-alloc-sections after --rename-sections so that
--prefix-alloc-sections code does not have to check if renaming has been
performed.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D66931
llvm-svn: 371591

[TLI][AMDGPU] AMDPAL does not have library functions
Configure TLI to say that r600/amdgpu does not have any library 
functions, such that InstCombine does not do anything like turn sin/cos 
into the library function @tan with sufficient fast math flags.
Differential Revision: https://reviews.llvm.org/D67406
Change-Id: I02f907d3e64832117ea9800e9f9285282856e5df llvm-svn: 371592

[LTO] Avoid calling GlobalValue::getGUID (MD5) twice
llvm-svn: 371593

[NFC][ARM] Add and modify tests
Add test for ParallelDSP.
llvm-svn: 371594