LoopVectorizer: When -Os is used, vectorize only loops that dont require a tail loop. There is no testcase because I dont know of a way to initialize the loop vectorizer pass without adding an additional hidden flag. 

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169950 91177308-0d34-0410-b5e6-96231b3b80d8
DAGCombine: clamp hi bit in APInt::getBitsSet to avoid assertion

rdar://12838504


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169951 91177308-0d34-0410-b5e6-96231b3b80d8
fix a typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169953 91177308-0d34-0410-b5e6-96231b3b80d8
- Rename isLegalMemOpType to isSafeMemOpType. "Legal" is a very overloade term.
Also added more comments to explain why it is generally ok to return true.
- Rename getOptimalMemOpType argument IsZeroVal to ZeroOrLdSrc. It's meant to
be true for loaded source (memcpy) or zero constants (memset). The poor name
choice is probably some kind of legacy issue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169954 91177308-0d34-0410-b5e6-96231b3b80d8
Fix the ascii drawing that was ruined when I split the H and CPP

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169955 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/CodeGen/X86/store_op_load_fold.ll: Add explicit triple.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169956 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/CodeGen/X86/store_op_load_fold.ll: Fix typo, s/CHECK_NEXT/CHECK-NEXT/

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169957 91177308-0d34-0410-b5e6-96231b3b80d8
Sorry about the churn. One more change to getOptimalMemOpType() hook. Did I
mention the inline memcpy / memset expansion code is a mess?

This patch split the ZeroOrLdSrc argument into two: IsMemset and ZeroMemset.
The first indicates whether it is expanding a memset or a memcpy / memmove.
The later is whether the memset is a memset of zero. It's totally possible
(likely even) that targets may want to do different things for memcpy and
memset of zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169959 91177308-0d34-0410-b5e6-96231b3b80d8
[CMake] Fixup R600.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169962 91177308-0d34-0410-b5e6-96231b3b80d8
Remove some dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169963 91177308-0d34-0410-b5e6-96231b3b80d8
Add ARM NONE and PREL31 relocation types.

Add R_ARM_NONE and R_ARM_PREL31 relocation types
to MCExpr.  Both of them will be used while
generating .ARM.extab and .ARM.exidx sections.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169965 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/CodeGen/X86/atom-bypass-slow-division.ll: Rename symbols, s/test_/Test/g, not to mismatch "CHECK(-NOT): test".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169977 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/CodeGen/X86/atom-bypass-slow-division.ll: Fix possible typo(s) in CHECK-NOT lines.

Found by Alexander Zinenko, thanks!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169978 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation: use a 'console' highlighter for terminal output examples.  This
gives a nicer output than 'bash'.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169979 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation: use a 'console' highlighter for terminal output examples.  This
gives a nicer output than 'bash'.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169981 91177308-0d34-0410-b5e6-96231b3b80d8
Improve debug info generated with enabled AddressSanitizer.

When ASan replaces <alloca instruction> with
<offset into a common large alloca>, it should also patch
llvm.dbg.declare calls and replace debug info descriptors to mark
that we've replaced alloca with a value that stores an address
of the user variable, not the user variable itself.

See PR11818 for more context.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169984 91177308-0d34-0410-b5e6-96231b3b80d8
The TargetData is not used for the isPowerOfTwo determination.  It has never
been used in the first place.  It simply was passed to the function and to the
recursive invocations.  Simply drop the parameter and update the callers for the
new signature.

Patch by Saleem Abdulrasool!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169988 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation: cleanup


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169990 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation: convert WritingAnLLVMPass.html to reST.

Patch by Anthony Mykhailenko with small fixes by me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169992 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation: AliasAnalysis.rst: improve internal and external links


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169993 91177308-0d34-0410-b5e6-96231b3b80d8