test/tools/lto/lit.local.cfg: Suppress llvm-lto test on Cygwin and Win32, for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191086 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test: Mark 3 tests as XFAIL:msvc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191087 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/tools/Makefile: Suppress building llvm-lto on cygming, for now, probably due to LTO.dll.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191088 91177308-0d34-0410-b5e6-96231b3b80d8
InstCombine: Canonicalize (gep i8* X, -(ptrtoint Y)) to (sub (ptrtoint X), (ptrtoint Y))

The GEP pattern is what SCEV expander emits for "ugly geps". The latter is what
you get for pointer subtraction in C code. The rest of instcombine already
knows how to deal with that so just canonicalize on that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191090 91177308-0d34-0410-b5e6-96231b3b80d8
Fixed typo in CreateProcessTrailingSlash test

--gtest_filter was filtering an invalid name for the test.

Differential Revision: http://llvm-reviews.chandlerc.com/D1733


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191100 91177308-0d34-0410-b5e6-96231b3b80d8
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