Revert r191017, it results in segmentation faults in Qt.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191104 91177308-0d34-0410-b5e6-96231b3b80d8
Delete empty files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191105 91177308-0d34-0410-b5e6-96231b3b80d8
SLPVectorizer: Handle more horizontal reductions (disabled)

Match reductions starting at binary operation feeding into a phi. The code
handles trees like

 r += v1 + v2 + v3 ...

and

 r += v1
 r += v2
 ...

and

 r *= v1 + v2 + ...

We currently only handle associative operations (add, fadd fast).

The code can now also handle reductions feeding into stores.

 a[i] = v1 + v2 + v3 + ...

The code is currently disabled behind the flag "-slp-vectorize-hor".  The cost
model for most architectures is not there yet.

I found one opportunity of a horizontal reduction feeding a phi in TSVC
(LoopRerolling-flt) and there are several opportunities where reductions feed
into stores.

radar://14607682

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191108 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] MUL should clobber HI0 and LO0.

I cannot think of a test case that reliably triggers this bug.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191109 91177308-0d34-0410-b5e6-96231b3b80d8
Fix some more MCJIT PIC test XFAILs (for i386)

Patch by Dimitry Andric

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191111 91177308-0d34-0410-b5e6-96231b3b80d8
InstCombine: Remove unused argument. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191112 91177308-0d34-0410-b5e6-96231b3b80d8
Migrate addGlobalName to the .cpp file as an intermediate step
to further work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191113 91177308-0d34-0410-b5e6-96231b3b80d8
MC: Tidy up.

Clean up some simple code quality issues. Bring internal naming
conventions up to current standard, fix inconsistent formatting, and
tidy up a couple of odd contructs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191117 91177308-0d34-0410-b5e6-96231b3b80d8
Resurrect r191017 " GVN proceeds in the presence of dead code" plus a fix to PR17307 & 17308.

  The problem of r191017 is that when GVN fabricate a val-number for a dead instruction (in order
to make following expr-PRE happy), it forget to fabricate a leader-table entry for it as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191118 91177308-0d34-0410-b5e6-96231b3b80d8
Move emission of the debug string table to early in the debug
info finalization to greatly reduce the number of fixups that the
assembler has to handle in order to improve compile time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191119 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "SLPVectorizer: Handle more horizontal reductions (disabled)"

This reverts commit r191108.

The horizontal.ll test case fails under libgmalloc. Thanks Shuxin for pointing
this out to me.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191121 91177308-0d34-0410-b5e6-96231b3b80d8
LoopVectorizer: Only allow vectorization of intrinsics. We can't know for sure that the functions 'abs' or 'round' are the functions from libm.

rdar://15012650



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191122 91177308-0d34-0410-b5e6-96231b3b80d8
Reapply "SLPVectorizer: Handle more horizontal reductions (disabled)""

Reapply r191108 with a fix for a memory corruption error I introduced.  Of
course, we can't reference the scalars that we replace by vectorizing and then
call their eraseFromParent method. I only 'needed' the scalars to get the
DebugLoc. Just store the DebugLoc before actually vectorizing instead. As a nice
side effect, this also simplifies the interface between BoUpSLP and the
HorizontalReduction class to returning a value pointer (the vectorized tree
root).

radar://14607682

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191123 91177308-0d34-0410-b5e6-96231b3b80d8
Set .reorder for the stub so that gas takes care of delay slot processing.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191125 91177308-0d34-0410-b5e6-96231b3b80d8
Initialize BSSSection explicitly in InitMachOMCObjectFileInfo() to appease msvc.

This can revert r191087.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191128 91177308-0d34-0410-b5e6-96231b3b80d8
SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too.

The Type Legalizer recognizes that VSELECT needs to be split, because the type
is to wide for the given target. The same does not always apply to SETCC,
because less space is required to encode the result of a comparison. As a result
VSELECT is split and SETCC is unrolled into scalar comparisons.

This commit fixes the issue by checking for VSELECT-SETCC patterns in the DAG
Combiner. If a matching pattern is found, then the result mask of SETCC is
promoted to the expected vector mask for the given target. This mask has usually
te same size as the VSELECT return type (except for Intel KNL). Now the type
legalizer will split both VSELECT and SETCC.

This allows the following X86 DAG Combine code to sucessfully detect the MIN/MAX
pattern. This fixes PR16695, PR17002, and <rdar://problem/14594431>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191130 91177308-0d34-0410-b5e6-96231b3b80d8
[X86] Emulate AVX 256bit MIN/MAX support by splitting the vector.

In AVX 256bit vectors are valid vectors and therefore the Type Legalizer doesn't
split the VSELECT and SETCC nodes. AVX only supports MIN/MAX on 128bit vectors
and this fix enables vector splitting for this special case in the X86 DAG
Combiner.

This fix is related to PR16695, PR17002, and <rdar://problem/14594431>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191131 91177308-0d34-0410-b5e6-96231b3b80d8
Fix the buildbot

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191133 91177308-0d34-0410-b5e6-96231b3b80d8
ELF: Parse types in directives like binutils gas

Allow binutils .type and .section directives to take the following
forms:
- @<type>
- %<type>
- "<type>"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191134 91177308-0d34-0410-b5e6-96231b3b80d8
SLPVectorizer: Fix multiline comment warning

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191135 91177308-0d34-0410-b5e6-96231b3b80d8