Commit Graph

101662 Commits

Author SHA1 Message Date
Zachary Turner
10683346a5 [llvm-pdbdump] Recursively dump class layout.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300258 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 21:11:00 +00:00
Craig Topper
a402bd1ba7 [ValueTracking] Remove duplicate call to computeKnownBits for the operands of Select.
We call it unconditionally on the operands of the select. Then decide if its a min/max and call it on the min/max operands or on the select operands again. Either of those second calls will overwrite the results of the initial call so we can just delete the first call.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300256 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:39:37 +00:00
Davide Italiano
77643b4d4f [LCSSA] Efficiently compute blocks dominating at least one exit.
For LCSSA purposes, loop BBs not dominating any of the exits aren't
interesting, as none of the values defined in these blocks can be
used outside the loop.

The way the code computed this information was by comparing each
BB of the loop with each of the exit blocks and ask the dominator tree
about their dominance relation. This is slow.

A more efficient way, implemented here, is that of starting from the
exit blocks and walking the dom upwards until we hit an header. By
transitivity, all the blocks we encounter in our path dominate an exit.

For the testcase provided in PR31851, this reduces compile time on
`opt -O2` by ~25%, going from 1m47s to 1m22s.

Thanks to Dan/MichaelZ for discussions/suggesting the approach/review.

Differential Revision:  https://reviews.llvm.org/D31843

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300255 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:36:59 +00:00
Reid Kleckner
85740fd11e Fix -Wunused-value warning
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300254 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:32:58 +00:00
Richard Smith
ef30b29ef5 Revert accidentally-committed files in r300252.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300253 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:31:21 +00:00
Richard Smith
74413b926a Remove all allocation and divisions from GreatestCommonDivisor
Switch from Euclid's algorithm to Stein's algorithm for computing GCD. This
avoids the (expensive) APInt division operation in favour of bit operations.
Remove all memory allocation from within the GCD loop by tweaking our `lshr`
implementation so it can operate in-place.

Differential Revision: https://reviews.llvm.org/D31968


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300252 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:29:59 +00:00
Reid Kleckner
caf5bedd42 [InstCombine] Fix !prof metadata preservation for invokes
Summary:
Bug noticed by inspection.

Extend the test to handle invokes as well as calls, and rewrite it to
not depend on the inliner and other passes.

Also simplify the call site replacement code with CallSite, similar to
what I did to dead arg elimination and arg promotion (rL300235 and
rL300229).

Reviewers: danielcdh, davidxl

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D32041

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300251 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:26:38 +00:00
Davide Italiano
c099906b13 [LCSSA] Assert that we always have a valid loop.
We could otherwise add BBs not belonging to a loop in `formLCSSA`
and later crash when trying to iterate the loop blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300244 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:05:37 +00:00
Davide Italiano
24b800cc1d [LCSSA] Remove spurious whitespaces. NFCI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300243 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:02:27 +00:00
Davide Italiano
3ce76120dd [LCSSA] Use auto when the type is obvious. NFCI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300242 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:01:30 +00:00
Nirav Dave
042486c448 [DAG] Fold away temporary vector in store candidate merge NFC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300241 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 20:00:27 +00:00
Dehao Chen
14eaa3c97f SamplePGO: convert callsite samples map key from callsite_location to callsite_location+callee_name
Summary: For iterative SamplePGO, an indirect call can be speculatively promoted to multiple direct calls and get inlined. All these promoted direct calls will share the same callsite location (offset+discriminator). With the current implementation, we cannot distinguish between different promotion candidates and its inlined instance. This patch adds callee_name to the key of the callsite sample map. And added helper functions to get all inlined callee samples for a given callsite location. This helps the profile annotator promote correct targets and inline it before annotation, and ensures all indirect call targets to be annotated correctly.

Reviewers: davidxl, dnovillo

Reviewed By: davidxl

Subscribers: andreadb, llvm-commits

Differential Revision: https://reviews.llvm.org/D31950

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300240 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 19:52:10 +00:00
Craig Topper
e1c6ddcf64 [ValueTracking] Prevent a call to computeKnownBits if we already know the state of the bit we would calculate. Also reuse a temporary APInt instead of creating a new one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300239 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 19:04:45 +00:00
Anna Thomas
0bd00d7d97 [LV] Fix the vector code generation for first order recurrence
Summary:
In first order recurrences where phi's are used outside the loop,
we should generate an additional vector.extract of the second last element from
the vectorized phi update.
This is because we require the phi itself (which is the value at the second last
iteration of the vector loop) and not the phi's update within the loop.
Also fix the code gen when we just unroll, but don't vectorize.
Fixes PR32396.

Reviewers: mssimpso, mkuper, anemet

Subscribers: llvm-commits, mzolotukhin

Differential Revision: https://reviews.llvm.org/D31979

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300238 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 18:59:25 +00:00
Sanjay Patel
7784ce736d [InstCombine] fold X == 0 || X == -1 to one compare (PR32524)
This is effectively a retry of:
https://reviews.llvm.org/rL299851
but now we have tests and an assert to make sure the bug
that was exposed with that attempt will not happen again.

I'll fix the code duplication and missing sibling fold next,
but I want to make this change as small as possible to reduce
risk since I messed it up last time.

This should fix:
https://bugs.llvm.org/show_bug.cgi?id=32524


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300236 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 18:47:06 +00:00
Reid Kleckner
fe376941a2 [DAE] Simplify call site replacement code with CallSite NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300235 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 18:42:03 +00:00
Craig Topper
a7bdbbca61 [ValueTracking] Move a temporary APInt instead of copying it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300233 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 18:25:53 +00:00
Reid Kleckner
d2a36f278b [InstCombine] Simplify attribute code with new AttributeList::get NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300230 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 18:11:03 +00:00
Reid Kleckner
0bd53cd74c [ArgPromotion] Don't drop !prof metadata on promoted calls
Noticed by inspection while doing attribute work. DAE, InstCombineCalls,
and ArgPromotion have a fair amount of duplicated code for hacking on
call sites, and you can find bugs by comparing them.

Add a test case for this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300229 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 18:10:30 +00:00
Stanislav Mekhanoshin
881e9f3177 [AMDGPU] Combine DS operations with offsets bigger than byte
In many cases ds operations can be combined even if offsets do not
fit into 8 bit encoding. What it takes is to adjust base address.

Differential Revision: https://reviews.llvm.org/D31993

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300227 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 17:53:07 +00:00
Sanjay Patel
c1e5fd3c42 [InstCombine] use similar ops for related folds; NFCI
It's less efficient to produce 'ule' than 'ult' since we know we're going to
canonicalize to 'ult', but we shouldn't have duplicated code for these folds.

As a trade-off, this was a pretty terrible way to make a '2'. :)
       if (LHSC == SubOne(RHSC)) 
         AddC = ConstantExpr::getSub(AddOne(RHSC), LHSC);

The next steps are to share the code to fix PR32524 and add the missing 'and'
fold that was left out when PR14708 was fixed:
https://bugs.llvm.org/show_bug.cgi?id=14708



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300222 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 17:36:24 +00:00
Brian Gesiak
b2b7c4b1a7 [Analysis] Support bitreverse in -demanded-bits pass
Summary:
* Add a bitreverse case in the demanded bits analysis pass.
* Add tests for the bitreverse (and bswap) intrinsic in the
  demanded bits pass.
* Add a test case to the BDCE tests: that manipulations to
  high-order bits are eliminated once the bits are reversed
  and then right-shifted.

Reviewers: mkuper, jmolloy, hfinkel, trentxintong

Reviewed By: jmolloy

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31857

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300215 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 16:44:25 +00:00
Tobias Edler von Koch
7f80f1bbf5 LTO: Pass SF_Executable flag through to InputFile::Symbol
Summary:
The linker needs to be able to determine whether a symbol is text or data to
handle the case of a common being overridden by a strong definition in an
archive. If the archive contains a text member of the same name as the common,
that function is discarded. However, if the archive contains a data member of
the same name, that strong definition overrides the common. This is a behavior
of ld.bfd, which the Qualcomm linker also supports in LTO.

Here's a test case to illustrate:

####

cat > 1.c << \!
int blah;
!

cat > 2.c << \!
int blah() {
  return 0;
}
!

cat > 3.c << \!
int blah = 20;
!

clang -c 1.c
clang -c 2.c
clang -c 3.c

ar cr lib.a 2.o 3.o
ld 1.o lib.a -t

####

The correct output is:

1.o
(lib.a)3.o

Thanks to Shankar Easwaran and Hemant Kulkarni for the test case!

Reviewers: mehdi_amini, rafael, pcc, davide

Reviewed By: pcc

Subscribers: davide, llvm-commits, inglorion

Differential Revision: https://reviews.llvm.org/D31901

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300205 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 16:24:14 +00:00
Sanjay Patel
9defcc4205 [InstCombine] fix assert to not always be true
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300202 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 16:05:01 +00:00
Geoff Berry
0f154b0e36 Re-apply "[GVNHoist] Move GVNHoist to function simplification part of pipeline."
This reverts commit r296872 now that PR32153 has been fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300200 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 15:36:25 +00:00
Krzysztof Parzyszek
7fa51d159a [Hexagon] Implement HexagonTargetLowering::CanLowerReturn
Patch by Michael Wu.

Differential Revision: https://reviews.llvm.org/D32000


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300199 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 15:05:51 +00:00
Krzysztof Parzyszek
db734f0a3d [Hexagon] Fix "LowerFormalArguments emitted a value with the wrong type!" assertion
Patch by Michael Wu.

Differential Revision: https://reviews.llvm.org/D31999


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300198 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 15:00:18 +00:00
Serge Pavlov
cf2d2611cf Use methods to access data stored with frame instructions
Instructions CALLSEQ_START..CALLSEQ_END and their target dependent
counterparts keep data like frame size, stack adjustment etc. These
data are accessed by getOperand using hard coded indices. It is
error prone way. This change implements the access by special methods,
which improve readability and allow changing data representation without
massive changes of index values.

Differential Revision: https://reviews.llvm.org/D31953


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300196 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 14:10:52 +00:00
Ayman Musa
67b50524f6 [X86] Added missing mayLoad/mayStore attributes to some X86 instructions.
Throughout the effort of automatically generating the X86 memory folding tables these missing information were encountered.
This is a preparation work for a future patch including the automation of these tables.

Differential Revision: https://reviews.llvm.org/D31714



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300190 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 10:03:45 +00:00
George Rimar
2c882c2737 [DWARF] - Simplify (use dyn_cast instead of isa + cast).
This addresses post commit review comments for r300039.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300188 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 09:52:50 +00:00
Ayman Musa
456f727677 [X86] Change instructions names to keep consistency with the naming convention. NFC
Differential Revision: https://reviews.llvm.org/D31743



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300184 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 09:12:32 +00:00
Ayal Zaks
17f2fca608 [LV] Refactor ILV to provide vectorizeInstruction(); NFC
Refactoring InnerLoopVectorizer's vectorizeBlockInLoop() to provide
vectorizeInstruction(). Aligning DeadInstructions with its only user.
Facilitates driving the transformation by VPlan - follows
https://reviews.llvm.org/D28975 and its tentative breakdown.

Differential Revision: https://reviews.llvm.org/D31997


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300183 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 09:07:23 +00:00
Craig Topper
c170edb60b [APInt] Reorder fields to avoid a hole in the middle of the class
Summary:
APInt is currently implemented with an unsigned BitWidth field first and then a uint_64/pointer union. Due to the 64-bit size of the union there is a hole after the bitwidth.

Putting the union first allows the class to be packed. Making it 12 bytes instead of 16 bytes. An APSInt goes from 20 bytes to 16 bytes.

This shows a 4k reduction on the size of the opt binary on my local x86-64 build. So this enables some other improvement to the code as well.

Reviewers: dblaikie, RKSimon, hans, davide

Reviewed By: davide

Subscribers: davide, llvm-commits

Differential Revision: https://reviews.llvm.org/D32001

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300171 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 04:59:11 +00:00
Craig Topper
cd686df68a [APInt] Generalize the implementation of tcIncrement to support adding a full 'word' by introducing tcAddPart. Use this to support tcIncrement, operator++ and operator+=(uint64_t). Do the same for subtract. NFCI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300169 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 04:36:06 +00:00
Lang Hames
ed576a186f [ORC] Add RPC and serialization support for Errors and Expecteds.
This patch allows Error and Expected types to be passed to and returned from
RPC functions.

Serializers and deserializers for custom error types (types deriving from the
ErrorInfo class template) can be registered with the SerializationTraits for
a given channel type (see registerStringError in RPCSerialization.h for an
example), allowing a given custom type to be sent/received. Unregistered types
will be serialized/deserialized as StringErrors using the custom type's log
message as the error string.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300167 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 03:51:35 +00:00
Peter Collingbourne
8b69529e74 Support: Add a VCSRevision.h header file.
This is a magic header file supported by the build system that provides a
single definition, LLVM_REVISION, containing an LLVM revision identifier,
if available. This functionality previously lived in the LTO library, but
I am moving it out to lib/Support because I want to also start using it in
lib/Object to create the IR symbol table.

This change also fixes a bug where LLVM_REVISION was never actually being
used in lib/LTO because the macro HAS_LLVM_REVISION was never defined (it
was misspelled as HAVE_SVN_VERSION_INC in lib/LTO/CMakeLists.txt, and was
only being defined in a non-existent file Version.cpp).

I also changed the code to use "git rev-parse --git-dir" to locate the .git
directory, instead of looking for it in the LLVM source root directory,
which makes this compatible with monorepos as well as git worktrees.

Differential Revision: https://reviews.llvm.org/D31985

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300160 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 01:26:12 +00:00
Lang Hames
ebc666e155 [ORC] Add missing file from r300155.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300157 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 01:06:45 +00:00
Lang Hames
a43d3686c7 [ORC] Use native Errors rather than converted std::error_codes for ORC RPC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300155 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 01:03:06 +00:00
Reid Kleckner
e9a46bf123 [IR] Take func, ret, and arg attrs separately in AttributeList::get
This seems like a much more natural API, based on Derek Schuff's
comments on r300015. It further hides the implementation detail of
AttributeList that function attributes come last and appear at index
~0U, which is easy for the user to screw up. git diff says it saves code
as well: 97 insertions(+), 137 deletions(-)

This also makes it easier to change the implementation, which I want to
do next.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300153 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 00:58:09 +00:00
Craig Topper
2d32ddf143 [IR] Remove the APIntMoveTy typedef from ConstantRange. Use APInt type directly.
This typedef used to be conditional based on whether rvalue references were supported. Looks like it got left behind when we switched to always having rvalue references with c++11. I don't think it provides any value now.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300146 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-13 00:20:31 +00:00
Konstantin Zhuravlyov
fae6220cbb Fix compiler error in Attributes.cpp
```
Compiling Attributes.cpp ...
../../../Attributes.cpp: In member function 'std::__1::pair<unsigned int, llvm::Optional<unsigned int> > llvm::AttributeSet::getAllocSizeArgs() const':
../../../Attributes.cpp:542:69: error: operands to ?: have different types 'std::__1::pair<unsigned int, llvm::Optional<unsigned int> >' and 'std::__1::pair<int, int>'
   return SetNode ? SetNode->getAllocSizeArgs() : std::make_pair(0, 0);
                                                                     ^
../../../Attributes.cpp:543:1: error: control reaches end of non-void function [-Werror=return-type]
 }
 ^
```

Differential Revision: https://reviews.llvm.org/D31981


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300143 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:57:37 +00:00
Wei Ding
24e7b0fb5c AMDGPU : Fix common dominator of two incoming blocks terminates with uniform branch issue.
Differential Revision: http://reviews.llvm.org/D31350

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300142 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:51:47 +00:00
Richard Smith
e22326d7b4 Fix some ArgList uses after API change in r300135.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300139 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:43:58 +00:00
Zachary Turner
71cd6a6292 Fix initialization order of class members.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300137 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:27:43 +00:00
Richard Smith
e05ab25f5d ArgList: cache index ranges containing arguments with each ID
Improve performance of argument list parsing with large numbers of IDs and
large numbers of arguments, by tracking a conservative range of indexes within
the argument list that might contain an argument with each ID. In the worst
case (when the first and last argument with a given ID are at the opposite ends
of the argument list), this still results in a linear-time walk of the list,
but it helps substantially in the common case where each ID occurs only once,
or a few times close together in the list.

This gives a ~10x speedup to clang's `test/Driver/response-file.c`, which
constructs a very large set of command line arguments and feeds them to the
clang driver.

Differential Revision: https://reviews.llvm.org/D30130


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300135 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:19:51 +00:00
Zachary Turner
67dcd802e3 [llvm-pdbdump] Minor prepatory refactor of Class Def Dumper.
In a followup patch I intend to introduce an additional dumping
mode which dumps a graphical representation of a class's layout.
In preparation for this, the text-based layout printer needs to
be split out from the graphical layout printer, and both need
to be able to use the same code for printing the intro and outro
of a class's definition (e.g. base class list, etc).

This patch does so, and in the process introduces a skeleton
definition for the graphical printer, while currently making
the graphical printer just print nothing.

NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300134 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:18:51 +00:00
Zachary Turner
7724dc63a7 [llvm-pdbdump] More advanced class definition dumping.
Previously the dumping of class definitions was very primitive,
and it made it hard to do more than the most trivial of output
formats when dumping.  As such, we would only dump one line for
each field, and then dump non-layout items like nested types
and enums.

With this patch, we do a complete analysis of the object
hierarchy including aggregate types, bases, virtual bases,
vftable analysis, etc.  The only immediately visible effects
of this are that a) we can now dump a line for the vfptr where
before we would treat that as padding, and b) we now don't
treat virtual bases that come at the end of a class as padding
since we have a more detailed analysis of the class's storage
usage.

In subsequent patches, we should be able to use this analysis
to display a complete graphical view of a class's layout including
recursing arbitrarily deep into an object's base class / aggregate
member hierarchy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300133 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:18:21 +00:00
Akira Hatanaka
69dba78684 [libFuzzer] XFAIL fuzzer-oom.test on Darwin.
The test fails on Darwin because Fuzzer::DeathCallback (which calls
DumpCurrentUnit("crash-")) is called before DumpCurrentUnit("oom-") is
called in Fuzzer::RssLimitCallback. DeathCallback is transitively called
from __sanitizer_print_memory_profile.

This should fix the fuzzer bot that has been failing for a while:

http://lab.llvm.org:8080/green/job/libFuzzer/

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300127 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 23:15:10 +00:00
Craig Topper
b25869aa9e [InstSimplify] Don't try to constant fold AllocaInsts since it won't do anything.
Should give a small compile time improvement.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300125 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 22:54:24 +00:00
Craig Topper
53726fa11a [ValueTracking] Teach GetUnderlyingObject to stop when it reachs an alloca instruction.
Previously it tried to call SimplifyInstruction which doesn't know anything about alloca so defers to constant folding which also doesn't do anything with alloca. This results in wasted cycles making calls that won't do anything. Given the frequency with which this function is called this time adds up.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300118 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 22:29:23 +00:00