Commit Graph

107439 Commits

Author SHA1 Message Date
Hal Finkel
3da41a28a1 Revert "Revert '[DAGCombiner] Split up an indexed load if only the base pointer value is live'"
I reverted r208640 in r209747 because r208640 broke self-hosting on PPC64. The
underlying cause of the failure is that pre-inc loads with increments
represented by ISD::TargetConstants were being transformed into ISD:::ADDs with
ISD::TargetConstant operands. PPC doesn't have a pattern for those, and so they
were selected as invalid r+r adds.

This recommits r208640, rebased and with an exclusion for ISD::TargetConstant
increments. This behavior seems correct, although in the future we might want
to ask the target to split out the indexing that uses ISD::TargetConstants.

Unfortunately, I don't yet have small test case where the relevant invalid
'add' instruction is not itself dead (and thus eliminated by
DeadMachineInstructionElim -- sometimes bugpoint is too good at removing things)

Original commit message (by Adam Nemet):

Right now the load may not get DCE'd because of the side-effect of updating
the base pointer.

This can happen if we lower a read-modify-write of an illegal larger type
(e.g. i48) such that the modification only affects one of the subparts (the
lower i32 part but not the higher i16 part).  See the testcase.

In order to spot the dead load we need to revisit it when SimplifyDemandedBits
decided that the value of the load is masked off.  This is the
CommitTargetLoweringOpt piece.

I checked compile time with ARM64 by sending SPEC bitcode files through llc.
No measurable change.

Fixes <rdar://problem/16031651>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216898 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-02 06:24:04 +00:00
Hal Finkel
dea837d3c5 [PowerPC] Guard against illegal selection of add for TargetConstant operands
r208640 was reverted because it caused a self-hosting failure on ppc64. The
underlying cause was the formation of ISD::ADD nodes with ISD::TargetConstant
operands. Because we have no patterns for 'add' taking 'timm' nodes, these are
selected as r+r add instructions (which is a miscompile). Guard against this
kind of behavior in the future by making the backend crash should this occur
(instead of silently generating invalid output).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216897 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-02 06:23:54 +00:00
Saleem Abdulrasool
901a3419d1 CodeGen: indicate Windows unwind data format
The structures for Windows unwinding are shared across multiple platforms.
Indicate the encoding to be used for the particular target.  Use this to switch
the unwind emitter instantiated by the AsmPrinter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216895 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 23:48:39 +00:00
Saleem Abdulrasool
05c3ddfa4e CodeGen: split out the Win64Exception emitter
Move the Windows unwind information emitter into a separate header.  This is not
related to DWARF based emission.  NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216894 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 23:48:34 +00:00
Saleem Abdulrasool
0c1740ce1a MC: remove unnecessary enumeration prefix
This is an enum class, and will be appropriately prefixed, making the encoding
type prefix redundant.  No change to any uses as the use of this was not yet
introduced.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216893 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 23:48:29 +00:00
David Majnemer
e64e7c4634 SROA: Don't insert instructions before a PHI
SROA may decide that it needs to insert a bitcast and would set it's
insertion point before a PHI.  This will create an invalid module
right quick.

Instead, choose the first insertion point in the basic block that holds
our PHI.

This fixes PR20822.

Differential Revision: http://reviews.llvm.org/D5141

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216891 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 21:20:14 +00:00
David Majnemer
a0b2af46a5 Revert "Revert two GEP-related InstCombine commits"
This reverts commit r216698 which reverted r216523 and r216598.

We would attempt to perform the transformation even if the match()
failed because, as a side effect, it would set V.  This would trick us
into believing that we correctly found a place to correctly apply the
transform.

An additional test case was added to getelementptr.ll so that we might
not regress in the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216890 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 21:10:02 +00:00
Sanjay Patel
3c7bd3fbef Use an integer constant for FABS / FNEG (x86).
This change will ease refactoring LowerFABS() and LowerFNEG() 
since they have a lot of overlap.

Remove the creation of a floating point constant from an integer
because it's going to be used for a bitwise integer op anyway.

No change to codegen expected, but the verbose comment string
for asm output may change from float values to hex (integer),
depending on whether the constant already exists or not.

Differential Revision: http://reviews.llvm.org/D5052



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216889 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 19:01:47 +00:00
Sanjay Patel
73f8eff19e Add a convenience method to copy wrapping, exact, and fast-math flags (NFC).
The loop vectorizer preserves wrapping, exact, and fast-math properties of scalar instructions.
This patch adds a convenience method to make that operation easier because we need to do this
in the loop vectorizer, SLP vectorizer, and possibly other places.

Although this is a 'no functional change' patch, I've added a testcase to verify that the exact
flag is preserved by the loop vectorizer. The wrapping and fast-math flags are already checked
in existing testcases.

Differential Revision: http://reviews.llvm.org/D5138



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216886 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 18:44:57 +00:00
Jingyue Wu
88350bf61d Fix a typo in comments in r216862, NFC
PR20766 -> PR20776. Thanks Roman Divacky for the catch!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216883 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 14:55:04 +00:00
Tilmann Scheller
4016a9ea4a [ARM] Add Thumb-2 code size optimization regression test for EOR.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216881 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 12:59:34 +00:00
Tilmann Scheller
9e6f09d7ce ARM] Add Thumb-2 code size optimization regression test for BIC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216880 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 12:53:29 +00:00
Yuri Gorshenin
861eddb266 [asan-assembly-instrumentation] Prologue and epilogue are moved out from InstrumentMemOperand().
Reviewers: eugenis

Subscribers: llvm-commits

Differential revision: http://reviews.llvm.org/D4923

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216879 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 12:51:00 +00:00
Renato Golin
09e28e39f0 Thumb2 M-class MSR instruction support changes
This patch implements a few changes related to the Thumb2 M-class MSR instruction:
 * better handling of unpredictable encodings,
 * recognition of the _g and _nzcvqg variants by the asm parser only if the DSP
   extension is available, preferred output of MSR APSR moves with the _<bits>
   suffix for v7-M.

Patch by Petr Pavlu.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216874 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 11:25:07 +00:00
Patrik Hagglund
7948290532 Fix in InlineSpiller to make the rematerilization loop also consider
implicit uses of the whole register when a sub register is defined.

Now the same iterator is used in the rematerilization loop as in the
spill loop later.

Patch provided by Mikael Holmen.

This fix was proposed and reviewed by Quentin Colombet,
http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-August/076135.html.

Unfortunately, this error in the rematerilization code has only been
seen in a large test case for an out-of-tree target, and is probably
hard to reproduce on an in-tree target. Therefore, no testcase is
provided.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216873 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 11:04:07 +00:00
Yuri Gorshenin
c642ad9546 Revert "[asan-assembly-instrumentation] Prologue and epilogue are moved out from InstrumentMemOperand()."
This reverts commit 895aa39703.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216872 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 10:24:04 +00:00
Chandler Carruth
1faa445476 Fix a really bad miscompile introduced in r216865 - the else-if logic
chain became completely broken here as *all* intrinsic users ended up
being skipped, and the ones that seemed to be singled out were actually
the exact wrong set.

This is a great example of why long else-if chains can be easily
confusing. Switch the entire code to use early exits and early continues
to have simpler (and more importantly, correct) logic here, as well as
fixing the reversed logic for detecting and continuing on lifetime
intrinsics.

I've also significantly cleaned up the test case and added another test
case demonstrating an example where the optimization is not (trivially)
safe to perform.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216871 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 10:09:18 +00:00
Renato Golin
35b114fe18 Small refactor on VectorizerHint for deduplication
Previously, the hint mechanism relied on clean up passes to remove redundant
metadata, which still showed up if running opt at low levels of optimization.
That also has shown that multiple nodes of the same type, but with different
values could still coexist, even if temporary, and cause confusion if the
next pass got the wrong value.

This patch makes sure that, if metadata already exists in a loop, the hint
mechanism will never append a new node, but always replace the existing one.
It also enhances the algorithm to cope with more metadata types in the future
by just adding a new type, not a lot of code.

Re-applying again due to MSVC 2013 being minimum requirement, and this patch
having C++11 that MSVC 2012 didn't support.

Fixes PR20655.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216870 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 10:00:17 +00:00
Yuri Gorshenin
895aa39703 [asan-assembly-instrumentation] Prologue and epilogue are moved out from InstrumentMemOperand().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216869 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 09:56:45 +00:00
Hal Finkel
32418db285 Feed AA to the inliner and use AA->getModRefBehavior in AddAliasScopeMetadata
This feeds AA through the IFI structure into the inliner so that
AddAliasScopeMetadata can use AA->getModRefBehavior to figure out which
functions only access their arguments (instead of just hard-coding some
knowledge of memory intrinsics). Most of the information is only available from
BasicAA; this is important for preserving alias scoping information for
target-specific intrinsics when doing the noalias parameter attribute to
metadata conversion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216866 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 09:01:39 +00:00
Nick Lewycky
0cbef49d90 Ignore lifetime intrinsics in use list for MemCpyOptimizer. Patch by Luqman Aden, review by Hal Finkel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216865 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 06:03:11 +00:00
Nick Lewycky
7ba4e0705e Remove an errant outer loop that contains nothing but an inner loop over exactly the same elements. While no functionality is change intended (and hence there are no changes to tests), you don't want to skip this revision if bisecting for errors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216864 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 05:17:15 +00:00
Hal Finkel
5581563457 Fix AddAliasScopeMetadata again - alias.scope must be a complete description
I thought that I had fixed this problem in r216818, but I did not do a very
good job. The underlying issue is that when we add alias.scope metadata we are
asserting that this metadata completely describes the aliasing relationships
within the current aliasing scope domain, and so in the context of translating
noalias argument attributes, the pointers must all be based on noalias
arguments (as underlying objects) and have no other kind of underlying object.
In r216818 excluding appropriate accesses from getting alias.scope metadata is
done by looking for underlying objects that are not identified function-local
objects -- but that's wrong because allocas, etc. are also function-local
objects and we need to explicitly check that all underlying objects are the
noalias arguments for which we're adding metadata aliasing scopes.

This fixes the underlying-object check for adding alias.scope metadata, and
does some refactoring of the related capture-checking eligibility logic (and
adds more comments; hopefully making everything a bit clearer).

Fixes self-hosting on x86_64 with -mllvm -enable-noalias-to-md-conversion (the
feature is still disabled by default).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216863 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 04:26:40 +00:00
Jingyue Wu
d43e6df10b [MachineSink] Use the real post dominator tree
Summary:
Fixes a FIXME in MachineSinking. Instead of using the simple heuristics
in isPostDominatedBy, use the real MachinePostDominatorTree. The old
heuristics caused instructions to sink unnecessarily, and might create
register pressure.

Test Plan:
Added a NVPTX codegen test to verify that our change is in effect. It also
shows the unnecessary register pressure caused by over-sinking. Updated
affected tests in AArch64 and X86.

Reviewers: eliben, meheff, Jiangning

Reviewed By: Jiangning

Subscribers: jholewinski, aemerson, mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D4814



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216862 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-01 03:47:25 +00:00
David Blaikie
e2cf6dc5c9 DebugInfo: Elide lexical scopes which only contain other (inline or lexical) scopes.
DW_TAG_lexical_scopes inform debuggers about the instruction range for
which a given variable (or imported declaration/module/etc) is valid. If
the scope doesn't itself contain any such entities, it's a waste of
space and should be omitted.

We were correctly doing this for entirely empty leaves, but not for
intermediate nodes.

Reduces total (not just debug sections) .o file size for a bootstrap
-gmlt LLVM by 22% and bootstrap -gmlt clang executable by 13%. The wins
for a full -g build will be less as a % (and in absolute terms), but
should still be substantial - with some of that win being fewer
relocations, thus more substantiall reducing link times than fewer bytes
alone would have.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216861 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 21:26:22 +00:00
Matt Arsenault
30392bf191 Consider addrspaces in canLosslesslyBitCastTo()
Make this conservatively correct and report false for different
address spaces, which might require a nontrivial translation.

Based on the few uses of this, I don't think this currently
breaks anything.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216846 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 19:19:57 +00:00
David Blaikie
363d0d2738 DebugInfo: Move argument creation up into the caller that's unambiguously handling the subprogram scope (replacing a conditional with an assertion in the process)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216845 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 18:04:28 +00:00
David Blaikie
4b538d396f Delay adding imported entity DIEs to the lexical scope, streamlining the check for "this scope has nothing in it"
This makes the emptiness of the scope with regards to variables and
nested scopes is the same as with regards to imported entities. Just
check if we had nothing at all before we build the node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216840 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 05:46:17 +00:00
David Blaikie
677ae42511 Modify DwarfDebug::constructImportedEntityDIE to return rather than insert into the scope
Another step towards improving lexical_scope handling

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216839 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 05:41:15 +00:00
David Blaikie
ba466e6909 Refactor constructImportedEntityDIE(DwarfUnit, DIImportedEntity) to return a DIE rather than inserting it into a specified context.
First of many steps to improve lexical scope construction (to omit
trivial lexical scopes - those without any direct variables). To that
end it's easier not to create imported entities directly into the
lexical scope node, but to build them, then add them if necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216838 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 05:32:06 +00:00
David Blaikie
b8ee7c2bf6 Simplify expression using container's front() rather than begin()->
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216833 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 02:14:26 +00:00
David Blaikie
07f352637c Add some negative (and positive) static_assert checks for ArrayRef-of-pointer conversions introduced in r216709
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216830 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 01:33:41 +00:00
Josh Klontz
6e153ad30a [PATCH][Interpreter] Add missing FP intrinsic lowering.
Summary:
This extends the work done in [1], adding missing intrinsic lowering for floor, trunc, round and copysign.

[1] http://comments.gmane.org/gmane.comp.compilers.llvm.cvs/199372

Test Plan: Extended `test/ExecutionEngine/Interpreter/intrinsics.ll` to test the additional missing intrinsics. All tests pass.

Reviewers: dexonsmith

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5120

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216827 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 18:33:35 +00:00
Jordan Rose
d421075d0c Teach llvm-bcanalyzer to use one stream's BLOCKINFO to read another stream.
This allows streams that only use BLOCKINFO for debugging purposes to omit
the block entirely. As long as another stream is available with the correct
BLOCKINFO, the first stream can still be analyzed and dumped.

As part of this commit, BitstreamReader gets a move constructor and move
assignment operator, as well as a takeBlockInfo method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216826 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 17:07:55 +00:00
Craig Topper
3af13568fb Remove 'virtual' keyword from methods markedwith 'override' keyword.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216823 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 16:48:34 +00:00
Craig Topper
847998f0dd Use StringRef to avoid copies and simplify code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216822 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 16:48:22 +00:00
Craig Topper
8316713a9e Add a test for converting ArrayRef<T *> to ArrayRef<const T *>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216821 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 16:48:19 +00:00
Craig Topper
24ae56d4c9 Fix some cases where StringRef was being passed by const reference. Remove const from some other StringRefs since its implicitly const already.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216820 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 16:48:02 +00:00
Brad Smith
7ee57ccbc6 JIT support has been added awhile ago.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216819 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 14:52:34 +00:00
Hal Finkel
bd896c1b25 Fix AddAliasScopeMetadata to not add scopes when deriving from unknown pointers
The previous implementation of AddAliasScopeMetadata, which adds noalias
metadata to preserve noalias parameter attribute information when inlining had
a flaw: it would add alias.scope metadata to accesses which might have been
derived from pointers other than noalias function parameters. This was
incorrect because even some access known not to alias with all noalias function
parameters could easily alias with an access derived from some other pointer.
Instead, when deriving from some unknown pointer, we cannot add alias.scope
metadata at all. This fixes a miscompile of the test-suite's tramp3d-v4.
Furthermore, we cannot add alias.scope to functions unless we know they
access only argument-derived pointers (currently, we know this only for
memory intrinsics).

Also, we fix a theoretical problem with using the NoCapture attribute to skip
the capture check. This is incorrect (as explained in the comment added), but
would not matter in any code generated by Clang because we get only inferred
nocapture attributes in Clang-generated IR.

This functionality is not yet enabled by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216818 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 12:48:33 +00:00
David Majnemer
b265e6f1b6 InstCombine: Respect recursion depth in visitUDivOperand
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216817 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 09:19:05 +00:00
David Majnemer
c6219bad2e InstCombine: Try harder to combine icmp instructions
consider: (and (icmp X, Y), (and Z, (icmp A, B)))
It may be possible to combine (icmp X, Y) with (icmp A, B).
If we successfully combine, create an 'and' instruction with Z.

This fixes PR20814.

N.B. There is room for improvement after this change but I'm not
convinced it's worth chasing yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216814 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 06:18:20 +00:00
Juergen Ributzka
bcbae3d680 Revert r216805 "[MachineCombiner][AArch64] Use the correct register class for MADD, SUB, and OR."
I think this broke the build bot. Reverting it for now until I have time to take a closer look.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216813 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 06:16:26 +00:00
Sean Callanan
77c2eb2462 Fixed a build problem when there were headers
for a different LLVM present in the system header
lookup path.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216812 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 02:30:02 +00:00
Nick Kledzik
23e2653009 Add missing const to StringRef.copy()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216811 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 02:29:49 +00:00
Nick Kledzik
fbf47c2d09 Fix typo and formatting
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216809 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 01:57:34 +00:00
Nick Kledzik
aa4d2acf37 Object/llvm-objdump: allow dumping of mach-o exports trie
MachOObjectFile in lib/Object currently has no support for parsing the rebase, 
binding, and export information from the LC_DYLD_INFO load command in final 
linked mach-o images. This patch adds support for parsing the exports trie data
structure. It also adds an option to llvm-objdump to dump that export info.

I did the exports parsing first because it is the hardest. The information is 
encoded in a trie structure, but the standard ObjectFile way to inspect content 
is through iterators. So I needed to make an iterator that would do a 
non-recursive walk through the trie and maintain the concatenation of edges 
needed for the current string prefix.

I plan to add similar support in MachOObjectFile and llvm-objdump to 
parse/display the rebasing and binding info too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216808 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-30 00:20:14 +00:00
Juergen Ributzka
4e92383b67 [MachineCombiner][AArch64] Use the correct register class for MADD, SUB, and OR.
Select the correct register class for the various instructions that are
generated when combining instructions and constrain the registers to the
appropriate register class.

This fixes rdar://problem/18183707.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216805 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-29 23:48:09 +00:00
Juergen Ributzka
e7f301e079 [FastISel][AArch64] Use the correct register class for branches.
Also constrain the register class for branches.

This fixes rdar://problem/18181496.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216804 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-29 23:48:06 +00:00
Juergen Ributzka
bc420a0cc1 [MachineSinking] Clear kill flag of all operands at all their uses.
When sinking an instruction it might be moved past the original last use of one
of its operands. This last use has the kill flag set and the verifier will
obviously complain about this.

Before Machine Sinking (AArch64):
%vreg3<def> = ASRVXr %vreg1, %vreg2<kill>
%XZR<def> = SUBSXrs %vreg4, %vreg1<kill>, 160, %NZCV<imp-def>
...

After Machine Sinking:
%XZR<def> = SUBSXrs %vreg4, %vreg1<kill>, 160, %NZCV<imp-def>
...
%vreg3<def> = ASRVXr %vreg1, %vreg2<kill>

This fix clears all the kill flags in all instruction that use the same operands
as the instruction that is being sunk.

This fixes rdar://problem/18180996.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216803 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-29 23:48:03 +00:00