Fix a bug in the code that merges consecutive stores. Previously we did not
check if loads that happen in between stores alias with the first store in the
chain, only with the second store onwards.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169516 91177308-0d34-0410-b5e6-96231b3b80d8
Simplify code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169521 91177308-0d34-0410-b5e6-96231b3b80d8
Allow modifying an ImmutableMap without canonicalizing it immediately.

This is an alternative to the ImmutableMapRef interface where a factory
should still be canonicalizing by default, but in certain cases an
improvement can be made by delaying the canonicalization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169532 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unneeded function, since PR8156 was fixed over a year ago.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169534 91177308-0d34-0410-b5e6-96231b3b80d8
Replace r169459 with something safer. Rather than having computeMaskedBits to
understand target implementation of any_extend / extload, just generate
zero_extend in place of any_extend for liveouts when the target knows the
zero_extend will be implicit (e.g. ARM ldrb / ldrh) or folded (e.g. x86 movz).

rdar://12771555


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169536 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Allow modifying an ImmutableMap without canonicalizing it immediately."

Jordan and I discussed this, and we don't want this in the API.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169541 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation: fix typos and formatting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169546 91177308-0d34-0410-b5e6-96231b3b80d8
Fix typos in CHECK lines.

Patch by Alexander Zinenko.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169547 91177308-0d34-0410-b5e6-96231b3b80d8
Remove trailing spaces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169550 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused field.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169551 91177308-0d34-0410-b5e6-96231b3b80d8
fixed valgrind issues of prior commit, this change applies r169456 changes back to the tree with fixes. on darwin no valgrind issues exist in the tests that used to fail.

original change description:

change MCContext to work on the doInitialization/doFinalization model

reviewed by Evan Cheng <evan.cheng@apple.com>




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169553 91177308-0d34-0410-b5e6-96231b3b80d8
Modify the LLVM checkout of googletest:
1) don't delete gtest-all.cc (which is used to gather all gtest source
   files in a single file) 
2) make including LLVMSupport headers optional (on by default).
   Sanitizer tools may want to use their own versions of googletest
   compiled with specific flags, instead of the common googletest
   library used for all other LLVM/Clang unittests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169559 91177308-0d34-0410-b5e6-96231b3b80d8
Add a 'using' declaration to suppress GCC's -Woverloaded-virtual while we
decide what pattern we want to follow in the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169561 91177308-0d34-0410-b5e6-96231b3b80d8
Try to unbreak makefile build by excluding gtest-all.cc source

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169564 91177308-0d34-0410-b5e6-96231b3b80d8
Add convenience accessor to Triple for OS == NaCl


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169565 91177308-0d34-0410-b5e6-96231b3b80d8
unittest/googletest/Makefile: Unbreak out-of-tree build.

  - Use SOURCES instead of Source. See Makefile.rules and MakefileGuide.html.
  - Don't assume the current directory. $(wildcard *.cc) doesn't match anything on corresponding build directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169568 91177308-0d34-0410-b5e6-96231b3b80d8
Makefile.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables .

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169569 91177308-0d34-0410-b5e6-96231b3b80d8
Add manualRetain() and manualRelease() to ImmutableMapRef, and add a new constructor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169572 91177308-0d34-0410-b5e6-96231b3b80d8
Add support to ValueTracking for determining that a pointer is non-null
by virtue of inbounds GEPs that preclude a null pointer.

This is a very common pattern in the code generated by std::vector and
other standard library routines which use allocators that test for null
pervasively. This is one step closer to teaching Clang+LLVM to be able
to produce an empty function for:

  void f() {
    std::vector<int> v;
    v.push_back(1);
    v.push_back(2);
    v.push_back(3);
    v.push_back(4);
  }

Which is related to getting them to completely fold SmallVector
push_back sequences into constants when inlining and other optimizations
make that a possibility.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169573 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Remove unnecessary predicates.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169577 91177308-0d34-0410-b5e6-96231b3b80d8