Update testing case that was accidently duplicated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222210 91177308-0d34-0410-b5e6-96231b3b80d8
IR: Move MDNode operands from the back to the front

Having the operands at the back prevents subclasses from safely adding
fields.  Move them to the front.

Instead of replicating the custom `malloc()`, `free()` and `DestroyFlag`
logic that was there before, overload `new` and `delete`.

I added calls to a new `GenericMDNode::dropAllReferences()` in
`LLVMContextImpl::~LLVMContextImpl()`.  There's a maze of callbacks
happening during teardown, and this resolves them before we enter
the destructors.

Part of PR21532.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222211 91177308-0d34-0410-b5e6-96231b3b80d8
IR: Sink MDNode::Hash down to GenericMDNode::Hash

Part of PR21532.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222212 91177308-0d34-0410-b5e6-96231b3b80d8
IndVarSimplify: Allow LFTR to fire more often

I added a pessimization in r217102 to prevent miscompiles when the
incremented induction variable was used in a comparison; it would be
poison.

Try to use the incremented induction variable more often when we can be
sure that the increment won't end in poison.

Differential Revision: http://reviews.llvm.org/D6222

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222213 91177308-0d34-0410-b5e6-96231b3b80d8
SimplifyCFG: Range'ify some for-loops. No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222215 91177308-0d34-0410-b5e6-96231b3b80d8
llvm-readobj: Don't print the Characteristics field as the Subsystem

We claimed that we were printing the Subystem field when we were
actually printing the Characteristics field.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222216 91177308-0d34-0410-b5e6-96231b3b80d8
Allow DwarfCompileUnit::constructImportedEntityDIE to instanciate a GlobalVariable DIE.

Usually global variables are in a retain list and instanciated before
any call to constructImportedEntityDIE is made. This isn't true for
forward declarations though.
The testcase for this change is generated by a clang patched to emit
such forward declarations (patch at http://reviews.llvm.org/D6173
which will land soon). The updated testcase tests more than just
global variables, it now tests every type of 'using' clause we
support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222217 91177308-0d34-0410-b5e6-96231b3b80d8
docs: Fix a couple of typo-ish errors in WritingAnLLVMPass

- Make CallGraphSCCPass's paragraph about doFinalization refer to
  runOnSCC instead of runOnFunction, since that's what it's about.
- Fix a reference in the FunctionPass paragraph.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222222 91177308-0d34-0410-b5e6-96231b3b80d8
docs: Modernize some examples in WritingAnLLVMPass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222223 91177308-0d34-0410-b5e6-96231b3b80d8
InstCombine: Clean up foldLogOpOfMaskedICmps

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222229 91177308-0d34-0410-b5e6-96231b3b80d8
InstCombine: Fold away tautological masked compares

It is impossible for (x & INT_MAX) == 0 && x == INT_MAX to ever be true.

While this sort of reasoning should normally live in InstSimplify,
the machinery that derives this result is not trivial to split out.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222230 91177308-0d34-0410-b5e6-96231b3b80d8
CallGraphTest.cpp: Remove invalid tests. ++S might step over F if S == F.

MSVC Runtime detects "Assertion failed: vector iterator not incrementable"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222233 91177308-0d34-0410-b5e6-96231b3b80d8
Remove triple in testing case to recover an arm bot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222239 91177308-0d34-0410-b5e6-96231b3b80d8
Tweak EarlyCSE to recognize series of dead stores

EarlyCSE is giving up on the current instruction immediately when it recognizes that the current instruction makes a previous store trivially dead. There's no reason to do this. Once the previous store has been deleted, it's perfectly legal to remember the value of the current store (for value forwarding) and the fact the store occurred (it could be dead too!).

Reviewed by: Hal
Differential Revision: http://reviews.llvm.org/D6301



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222241 91177308-0d34-0410-b5e6-96231b3b80d8
Test commit to verify that commit access works.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222244 91177308-0d34-0410-b5e6-96231b3b80d8
[FastISel][AArch64] Fix shift-immediate emission for "zero" shifts.

This change emits a COPY for a shift-immediate with a "zero" shift value.
This fixes PR21594 where we emitted a shift instruction with an incorrect
immediate operand.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222247 91177308-0d34-0410-b5e6-96231b3b80d8
[Reassociate] Rename local variable to not use same name as a member
variable. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222248 91177308-0d34-0410-b5e6-96231b3b80d8
[Hexagon] Converting from ADD_rr to A2_add which has encoding bits.
Adding test to show correct instruction selection and encoding.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222249 91177308-0d34-0410-b5e6-96231b3b80d8
[Reassociate] Use test cases that can actually be optimized to verify optional
flags are cleared.  The reassociation pass was just reordering the leaf nodes
in the previous test cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222250 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: Make sure resource descriptors are always stored in SGPRs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222253 91177308-0d34-0410-b5e6-96231b3b80d8