Commit Graph

104364 Commits

Author SHA1 Message Date
Alp Toker
11e082eb54 Fix build when no native target is enabled
The JITTests and MCJITTests unit test targets require a native arch with JIT
support, otherwise fail to link.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210411 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-08 02:45:56 +00:00
Reed Kotler
b8ff7273c6 include MipsGenFastISel.inc
Summary:
Included this file which is needed to enable tablegen generated functionality
for fast mips-isel

Test Plan:
This has no visible functionality by itself but just adding the include
file creates some issues so I have it as a separate patch.

Reviewers: dsanders

Reviewed By: dsanders

Differential Revision: http://reviews.llvm.org/D3812

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210410 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-08 02:08:43 +00:00
Saleem Abdulrasool
e668525dd1 test: add test case for SVN r210406
Add missing test case for constructor section selection.  Thanks David Blaikie!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210409 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-08 01:27:32 +00:00
Saleem Abdulrasool
e231836fe4 test: move some tests into ARM directory
Rather than requiring ARM support for the ELF tests (which is odd), move the
tests that require ARM into a subdirectory to use lit to disable them if the
support is not present.  Play this game to prevent disabling the ELF tests on
the Windows build bots as they have caught issues in the past with interactions
between various platforms.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210408 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-08 01:04:05 +00:00
Saleem Abdulrasool
eb5f5ae200 MC: make ELF .type handling more GNU AS compatible
GAS documents the .type directive as having an optional comma following the key
symbol name when using the STT_<TYPE_IN_UPPER_CASE> form.  However, it treats
the comma as optional in all cases.  This makes the IAS support both forms of
inputs.  Furthermore, the prefixed forms take either the upper case name or the
lower case alias.

The tests are split into two separate sets as the hash character serves as a
comment character on x86, which is tested in the second set by using arm-elf
which uses the at symbol as a comment character.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210407 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-08 00:34:34 +00:00
Saleem Abdulrasool
a926467222 MC: fix ctor/dtor section for windows-itanium
This adjusts the section setup for the windows-itanium environment.  This
environment does not report to be a known windows msvc environment, even though
it is (nearly) identical to the MSVC environment for C code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210406 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-08 00:34:27 +00:00
Saleem Abdulrasool
83444b887d MC: whitespace, grouping for COFF section setup
Add some whitespace, combine two sequential conditionals into a single one.
Reformat some section definitions to maintain uniformity in the function.
NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210405 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-08 00:34:23 +00:00
Alp Toker
3c9b41b949 Fix typos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210401 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 21:23:09 +00:00
Alp Toker
e4dda5f030 Build fix: remove initializeJumpInstrTablesPass() call from LTO
This was incurring an unsatisfied dependency on CodeGen from LTO breaking
shared builds:

Undefined symbols for architecture x86_64:
  "llvm::initializeJumpInstrTablesPass(llvm::PassRegistry&)", referenced from:
      llvm::LTOCodeGenerator::initializeLTOPasses() in LTOCodeGenerator.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Removed as a temporary measure pending feedback from the author.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210400 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 20:39:53 +00:00
Saleem Abdulrasool
104e73dd34 ARM: correct assertion for long-calls on WoA
COFF/PE, so the relocation model is never static.  Loosen the assertion
accordingly.  The relocation can still be emitted properly, as it will be
converted to an IMAGE_REL_ARM_ADDR32 which will be resolved by the loader
taking the base relocation into account.  This is necessary to permit the
emission of long calls which can be controlled via the -mlong-calls option in
the driver.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210399 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 20:29:27 +00:00
Saleem Abdulrasool
3ddcc49650 tools: add a high level explanation for WoA EH data
Add a brief explanation of the data section layout for the unwind data that the
Windows on ARM EH models.  This is simply to provide a rough idea of the layout
of the code involved in the decoding of the unwinding.  Details on the involved
data structures are available in the associated support header.  The bulk of it
is related to printing out the byte-code to help validate generation of WoA EH.

No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210397 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 19:23:07 +00:00
Peter Zotov
1a17cd457b [OCaml] Commit missing parts of r210395
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210396 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 15:53:28 +00:00
Peter Zotov
c49250087a [OCaml] Introduce an llmdkind abstract type.
Patch by Gabriel Radanne.

While this commit technically breaks API, no code should have supplied
the integer IDs directly, and thus no code should break.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210395 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 15:15:10 +00:00
Rafael Espindola
68caf1727f Revert 209903 and 210040.
The messages were

 "PR19753: Optimize comparisons with "ashr exact" of a constanst."
 "Added support to optimize comparisons with "lshr exact" of a constant."

They were not correctly handling signed/unsigned operation differences,
causing pr19958.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210393 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 04:12:35 +00:00
Andrew Trick
808823cf77 Fix the MachineScheduler's logic for updating ready times for in-order.
Now the scheduler updates a node's ready time as soon as it is
scheduled, before releasing dependent nodes. There was a reason I
didn't do this initially but it no longer applies.

A53 is in-order and was running into an issue where nodes where added
to the readyQ too early. That's now fixed.

This also makes it easier for custom scheduling strategies to build
heuristics based on the actual cycles that the node was scheduled at.

The only impact on OOO (sandybridge/cyclone) is that ready times will
be slightly more accurate. I didn't measure any significant regressions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210390 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-07 01:48:43 +00:00
Eric Christopher
7fe88820e3 Replace the use of TargetMachine with a tiny bool variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210386 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 23:26:48 +00:00
Eric Christopher
df2f80d909 Remove all local variables from X86SelectionDAGInfo, the DAG has
all of the ones we were stashing away on startup.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210385 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 23:26:43 +00:00
Saleem Abdulrasool
6c862ed02b ADT: introduce isWindowsItaniumEnvironment
Add an isWindowsItaniumEnvironment function to Triple to mirror the other
Windows environments.  This is simply a utility function to check if we are
targeting windows-itanium rather than windows-msvc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210383 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 22:46:18 +00:00
David Blaikie
8ef9d22f5b DebugInfo: Use the scope of the function declaration, if any, to name a function in DWARF pubnames
This ensures that member functions, for example, are entered into
pubnames with their fully qualified name, rather than inside the global
namespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210379 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 22:29:05 +00:00
David Blaikie
ebcf48cf9e DebugInfo: pubnames: include file-local (static or anonymous namespace) variables and anonymous namespaces themselves.
Still some issues with name qualification, FIXMEs added to test cases
and fixes will come next.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210378 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 22:16:56 +00:00
Jingyue Wu
c77dec905a InstCombine: Canonicalize addrspacecast between different element types
addrspacecast X addrspace(M)* to Y addrspace(N)*

-->

bitcast X addrspace(M)* to Y addrspace(M)*
addrspacecast Y addrspace(M)* to Y addrspace(N)*

Updat all affected tests and add several new tests in addrspacecast.ll.

This patch is based on http://reviews.llvm.org/D2186 (authored by Matt
Arsenault) with fixes and more tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210375 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 21:52:55 +00:00
Saleem Abdulrasool
a51acc7631 MC: prevent early DCE of empty sections
Prevent the early elimination of sections in the object writer.  There may be
references to the section itself by other symbols, which may potentially not be
possible to resolve.  ML (Visual Studio's Macro Assembler) also seems to retain
empty sections.

The elimination of symbols and sections which are unused should really occur at
the link phase.  This will not cause any change in the resulting binary, simply
in the generated object files.

The adjustments to the other unit tests account for the fluctuating section
index caused by the appearance of sections which were previously discarded.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210373 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 21:40:16 +00:00
Benjamin Kramer
0da5960e5b X86: Don't turn shifts into ands if there's another use that may not check for equality.
Fixes PR19964.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210371 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 21:08:55 +00:00
Rafael Espindola
013321a0f9 Fix a few issues with comdat handling on COFF.
* Section association cannot use just the section name as many
sections can have the same name. With this patch, the comdat symbol in
an assoc section is interpreted to mean a symbol in the associated
section and the mapping is discovered from it.

* Comdat symbols were not being set correctly. Instead we were getting
whatever was output first for that section.

A consequence is that associative sections now must use .section to
set the association. Using .linkonce would not work since it is not
possible to change a sections comdat symbol (it is used to decide if
we should create a new section or reuse an existing one).

This includes r210298, which was reverted because it was asserting
on an associated section having the same comdat as the associated
section.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210367 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 19:26:12 +00:00
Eric Christopher
5448320a20 Have TargetSelectionDAGInfo take a DataLayout initializer rather than
a TargetMachine since the only thing it wants is DataLayout.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210366 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 19:04:48 +00:00
David Blaikie
5beec3aa92 Match the full hex offsets in test/DebugInfo/X86/gnu-public-names.ll
These checks were accidentally skipping the 0x prefix in the hex
offsets, then cunningly ignoring the prefix in the use of those captured
values.

Except in the case of the unit length, where the match was only matching
the leading '0' before the x in the 0x prefix, then matching that
against the length. We can't actually express the length association
here, as the length field in the Compile Unit header does not include
the length field itself, but the length field in the pubnames section
/does/ include the size of the length field in the Compile Unit header -
so the two numbers are actually 4 bytes different. Just skip matching
that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210364 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 18:45:14 +00:00
Dan Liew
8cfe2c00b0 Fix a typo made in Programmer's Manual made in r210354. Spotted
by Paul Robinson.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210363 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 18:44:21 +00:00
David Blaikie
8f6fe9e324 Remove DWARF3 testing of test/DebugInfo/X86/gnu-public-names.ll
This was added to test that DW_AT_GNU_pubnames used sec_offset in DWARF4
and data4 in DWARF3 and below. Since then we've updated
DW_AT_GNU_pubnames to be a flag, rather than a section offset anyway.

Granted this still differs between DWARF 3 and DWARF 4
(FORM_flag_present versun FORM_flag) but it doesn't seem worthwhile
testing that codepath again here. It's covered adequately in many other
test cases.

And while I'm here, don't hardcode the byte size of the compile unit -
it's not relevant to this test and just makes it brittle if/when
anything changes in the way this CU is emitted.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210362 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 18:22:04 +00:00
Filipe Cabecinhas
78cf19b9b9 Fixed a bug in lowering shuffle_vectors to insertps
Summary:
We were being too strict and not accounting for undefs.
Added a test case and fixed another one where we improved codegen.

Reviewers: grosbach, nadav, delena

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D4039

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210361 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 18:07:06 +00:00
Dan Liew
64d39d3281 Mention the IRBuilder in Programmer's Manual with a few small examples.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210354 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 17:25:47 +00:00
Michael Zolotukhin
f4f9c6bfc1 Fix typo in a test from r210342.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210343 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 15:49:47 +00:00
Michael Zolotukhin
afbe82d590 [SLP] Enable vectorization of GEP expressions.
The use cases look like the following:
    x->a = y->a + 10
    x->b = y->b + 12

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210342 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 15:34:24 +00:00
Bill Schmidt
6c9eb10784 [PPC64LE] Fix lowering of BUILD_VECTOR and SHUFFLE_VECTOR for little endian
This patch fixes a couple of lowering issues for little endian
PowerPC.  The code for lowering BUILD_VECTOR contains a number of
optimizations that are only valid for big endian.  For now, we disable
those optimizations for correctness.  In the future, we will add
analogous optimizations that are correct for little endian.

When lowering a SHUFFLE_VECTOR to a VPERM operation, we again need to
make the now-familiar transformation of swapping the input operands
and complementing the permute control vector.  Correctness of this
transformation is tested by the accompanying test case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210336 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 14:06:26 +00:00
Pekka Jaaskelainen
53b344dcca Slight language tweak from Jonathan Humphreys.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210327 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 11:21:44 +00:00
Alp Toker
af4eb8a3fe Touch configure to force clang's config.h.in reconfiguration on the build servers
Gutted that this is needed, folks who care about keeping the legacy build
system alive should sort this out already.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210321 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 10:36:38 +00:00
Iain Sandoe
d276b15c52 lld test for configure & make
r210177 added lld Makefiles, r210245 added automatic build when the source is present.

This revision completes the set by adding the lld test and unittests to the check-all target.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210318 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 09:06:25 +00:00
Timur Iskhodzhanov
3ad10cfab8 Revert r210298 'Correctly set the comdat symbol on COFF' as it asserts on Windows
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210317 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 08:18:18 +00:00
Simon Atanasyan
3c9a2ee891 [yaml2obj][obj2yaml] Support ELF symbol's visibility flags (default/hidden/protected).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210316 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 07:41:57 +00:00
Dinesh Dwivedi
2c3e3b491e Added select flavour for ABS and NEG(ABS)
This patch can identify 
  ABS(X) ==> (X >s 0) ? X : -X and (X >s -1) ? X : -X
  ABS(X) ==> (X <s 0) ? -X : X and (X <s 1) ? -X : X
  NABS(X) ==> (X >s 0) ? -X : X and (X >s -1) ? -X : X
  NABS(X) ==> (X <s 0) ? X : -X and (X <s 1) ? X : -X
  
and can transform
  ABS(ABS(X)) -> ABS(X)
  NABS(NABS(X)) -> NABS(X)
  
Differential Revision: http://reviews.llvm.org/D3658



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210312 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 06:54:45 +00:00
Alp Toker
7a0e6972ce Make LINK_POLLY_INTO_TOOLS work with the CMake build
The option check was being performed after config.h/llvm-config.h substitution,
generating incorrect macro definitions.

Fixes PR19614.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210311 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 06:39:00 +00:00
Karthik Bhat
b73a9b384e Fix PR19657 (scalar loads not combined into vector load)
If we have common uses on separate paths in the tree; process the one with greater common depth first.
This makes sure that we do not assume we need to extract a load when it is actually going to be part of a vectorized tree.

Review: http://reviews.llvm.org/D3800


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210310 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 06:20:08 +00:00
Alp Toker
dc4c7fb098 Remove clang-specific libxml2 check from CMake
clang's own CMake setup handles this as of r210308.

The CMAKE_CROSSCOMPILING special-case will no longer be hard-coded. This was
clearly site-specific to someone's local configuration and should be passed in
at configure time if needed with e.g. -DLIBXML2_LIBRARIES=... (the libxml2
target I tried here doesn't even support liblzma so it's *way* off).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210309 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 05:08:42 +00:00
Alp Toker
6eba708537 config.h: remove clang-specific macro definitions
These had no business in LLVM core.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210307 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 04:50:41 +00:00
Rafael Espindola
6fd1b8ee48 Allow aliases to be unnamed_addr.
Alias with unnamed_addr were in a strange state. It is stored in GlobalValue,
the language reference talks about "unnamed_addr aliases" but the verifier
was rejecting them.

It seems natural to allow unnamed_addr in aliases:

* It is a property of how it is accessed, not of the data itself.
* It is perfectly possible to write code that depends on the address
of an alias.

This patch then makes unname_addr legal for aliases. One side effect is that
the syntax changes for a corner case: In globals, unnamed_addr is now printed
before the address space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210302 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 01:20:28 +00:00
Alexey Samsonov
bbd34136f3 Fix markup for -debug-only option
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210300 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 23:12:43 +00:00
Alexey Samsonov
3b889b9d31 Fix null dereference with -debug-only=dwarfdebug
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210299 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 23:10:19 +00:00
Rafael Espindola
d605148d07 Correctly set the comdat symbol on COFF.
We extended the .section syntax to allow multiple sections with the
same name but different comdats, but currently we don't make sure that
the output section has that comdat symbol.

That happens to work with the code llc produces currently because it looks like

.section secName, "dr", one_only, "COMDATSym"
.globl COMDATSym
COMDATSym:
....

but that is not very friendly to anyone coding in assembly or even to
llc once we get comdat support in the IR.

This patch changes the coff object writer to make sure the comdat symbol is
output just after the section symbol, as required by the coff spec.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210298 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 23:09:25 +00:00
Bill Schmidt
5f81752533 [PPC64LE] Add test case for r210282 commit
Chandler correctly pointed out that I need an LLVM IR test for
r210282, which modified the vperm -> shuffle transform for little
endian PowerPC.  This patch provides that test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210297 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 22:57:38 +00:00
Eric Christopher
38ee55ddfa Remove X86Subtarget from the X86FrameLowering constructor since
we can just pass in the values we already know and we're not
caching the subtarget anymore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210292 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 22:10:58 +00:00
Jingyue Wu
6156e562ef Fixed several correctness issues in SeparateConstOffsetFromGEP
Most issues are on mishandling s/zext.

Fixes:

1. When rebuilding new indices, s/zext should be distributed to
sub-expressions. e.g., sext(a +nsw (b +nsw 5)) = sext(a) + sext(b) + 5 but not
sext(a + b) + 5. This also affects the logic of recursively looking for a
constant offset, we need to include s/zext into the context of the searching.

2. Function find should return the bitwidth of the constant offset instead of
always sign-extending it to i64.

3. Stop shortcutting zext'ed GEP indices. LLVM conceptually sign-extends GEP
indices to pointer-size before computing the address. Therefore, gep base,
zext(a + b) != gep base, a + b

Improvements:

1. Add an optimization for splitting sext(a + b): if a + b is proven
non-negative (e.g., used as an index of an inbound GEP) and one of a, b is
non-negative, sext(a + b) = sext(a) + sext(b)

2. Function Distributable checks whether both sext and zext can be distributed
to operands of a binary operator. This helps us split zext(sext(a + b)) to
zext(sext(a) + zext(sext(b)) when a + b does not signed or unsigned overflow.

Refactoring:

Merge some common logic of handling add/sub/or in find.

Testing:

Add many tests in split-gep.ll and split-gep-and-gvn.ll to verify the changes
we made.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210291 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 22:07:33 +00:00