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* [X86] Merge the different CMOV instructions for each condition code into ↵Craig Topper2019-04-051-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | single instructions that store the condition code as an immediate. Summary: Reorder the condition code enum to match their encodings. Move it to MC layer so it can be used by the scheduler models. This avoids needing an isel pattern for each condition code. And it removes translation switches for converting between CMOV instructions and condition codes. Now the printer, encoder and disassembler take care of converting the immediate. We use InstAliases to handle the assembly matching. But we print using the asm string in the instruction definition. The instruction itself is marked IsCodeGenOnly=1 to hide it from the assembly parser. This does complicate the scheduler models a little since we can't assign the A and BE instructions to a separate class now. I plan to make similar changes for SETcc and Jcc. Reviewers: RKSimon, spatel, lebedev.ri, andreadb, courbet Reviewed By: RKSimon Subscribers: gchatelet, hiraditya, kristina, lebedev.ri, jdoerfert, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D60041 llvm-svn: 357800
* [NFC][llvm-exegesis] Refactor ResolvedSchedClass & friendsRoman Lebedev2019-03-292-10/+11
| | | | | | | | | | | | | | | | | | | | | Summary: `ResolvedSchedClass` will need to be used outside of `Analysis` (before `InstructionBenchmarkClustering` even), therefore promote it into a non-private top-level class, and while there also move all of the functions that are only called by `ResolvedSchedClass` into that same new file. Reviewers: courbet, gchatelet Reviewed By: courbet Subscribers: mgorny, tschuett, mgrang, jdoerfert, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D59993 llvm-svn: 357259
* [llvm-exegesis] Introduce a 'naive' clustering algorithm (PR40880)Roman Lebedev2019-03-281-5/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: This is an alternative to D59539. Let's suppose we have measured 4 different opcodes, and got: `0.5`, `1.0`, `1.5`, `2.0`. Let's suppose we are using `-analysis-clustering-epsilon=0.5`. By default now we will start processing the `0.5` point, find that `1.0` is it's neighbor, add them to a new cluster. Then we will notice that `1.5` is a neighbor of `1.0` and add it to that same cluster. Then we will notice that `2.0` is a neighbor of `1.5` and add it to that same cluster. So all these points ended up in the same cluster. This may or may not be a correct implementation of dbscan clustering algorithm. But this is rather horribly broken for the reasons of comparing the clusters with the LLVM sched data. Let's suppose all those opcodes are currently in the same sched cluster. If i specify `-analysis-inconsistency-epsilon=0.5`, then no matter the LLVM values this cluster will **never** match the LLVM values, and thus this cluster will **always** be displayed as inconsistent. The solution is obviously to split off some of these opcodes into different sched cluster. But how do i do that? Out of 4 opcodes displayed in the inconsistency report, which ones are the "bad ones"? Which ones are the most different from the checked-in data? I'd need to go in to the `.yaml` and look it up manually. The trivial solution is to, when creating clusters, don't use the full dbscan algorithm, but instead "pick some unclustered point, pick all unclustered points that are it's neighbor, put them all into a new cluster, repeat". And just so as it happens, we can arrive at that algorithm by not performing the "add neighbors of a neighbor to the cluster" step. But that won't work well once we teach analyze mode to operate in on-1D mode (i.e. on more than a single measurement type at a time), because the clustering would depend on the order of the measurements. Instead, let's just create a single cluster per opcode, and put all the points of that opcode into said cluster. And simultaneously check that every point in that cluster is a neighbor of every other point in the cluster, and if they are not, the cluster (==opcode) is unstable. This is //yet another// step to bring me closer to being able to continue cleanup of bdver2 sched model.. Fixes [[ https://bugs.llvm.org/show_bug.cgi?id=40880 | PR40880 ]]. Reviewers: courbet, gchatelet Reviewed By: courbet Subscribers: tschuett, jdoerfert, RKSimon, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D59820 llvm-svn: 357152
* [llvm-exegesis] Allow the target to disable the selection of some registers.Clement Courbet2019-03-261-0/+4
| | | | | | | | | | | | | | | | | | | | Summary: This prevents "Cannot encode high byte register in REX-prefixed instruction" from happening on instructions that require REX encoding when AH & co get selected. On the down side, these 4 registers can no longer be selected automatically, but this avoids having to expose all the X86 encoding complexity. Reviewers: gchatelet Subscribers: tschuett, jdoerfert, llvm-commits, bdb Tags: #llvm Differential Revision: https://reviews.llvm.org/D59821 llvm-svn: 357003
* [llvm-exegesis] Fix compilation before c++17.Clement Courbet2019-03-221-1/+1
| | | | | | | ClusteringTest.cpp:25:23: error: constexpr variable cannot have non-literal type 'const llvm::exegesis::(anonymous namespace)::(lambda at /home/buildslave/ps4-buildslave4/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/llvm.src/unittests/tools/llvm-exegesis/ClusteringTest.cpp:25:35)' static constexpr auto HasPoints = [](const std::vector<int> &Indices) { llvm-svn: 356748
* [llvm-exegesis] Add clustering test.Clement Courbet2019-03-221-5/+37
| | | | | | | | | | | | Summary: To show that dbscan is insensitive to the order of the points. Subscribers: tschuett, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D59693 llvm-svn: 356747
* Update the file headers across all of the LLVM projects in the monorepoChandler Carruth2019-01-1915-60/+45
| | | | | | | | | | | | | | | | | to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
* [llvm-exegesis][NFC] Some code style cleanupJinsong Ji2018-11-204-1/+38
| | | | | | | | | | | | | Apply review comments of https://reviews.llvm.org/D54185 to other target as well, specifically: 1. make anonymous namespaces as small as possible, avoid using static inside anonymous namespaces 2. Add missing header to some files 3. GetLoadImmediateOpcodem-> getLoadImmediateOpcode 4. Fix typo Differential Revision: https://reviews.llvm.org/D54343 llvm-svn: 347309
* [llvm-exegesis][NFC] More tests for ExegesisTarget::fillMemoryOperands().Clement Courbet2018-11-191-16/+32
| | | | | | | | | | Reviewers: gchatelet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D54304 llvm-svn: 347209
* [llvm-exegesis] Fix unit tests on PowerPC/AArch64.Clement Courbet2018-11-092-4/+6
| | | | | | We were comparing char*s and not contents. Introduced in rL346489. llvm-svn: 346493
* [llvm-exegesis][NFC] Add a way to declare the default counter binding for ↵Clement Courbet2018-11-092-0/+12
| | | | | | | | | | | | | | | | unbound CPUs for a target. Summary: This simplifies the code and moves everything to tablegen for consistency. This also prepares the ground for adding issue counters. Reviewers: gchatelet, john.brawn, jsji Subscribers: nemanjai, mgorny, javed.absar, kbarton, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D54297 llvm-svn: 346489
* [PowerPC][llvm-exegesis] Add a PowerPC targetJinsong Ji2018-11-084-0/+182
| | | | | | | | | This is patch to add PowerPC target to llvm-exegesis. The target does just enough to be able to run llvm-exegesis in latency mode for at least some opcodes. Differential Revision: https://reviews.llvm.org/D54185 llvm-svn: 346411
* [llvm-exegesis] Implements a cache of Instruction objects.Guillaume Chatelet2018-10-241-3/+3
| | | | llvm-svn: 345130
* [llvm-exegesis] Move namespace exegesis inside llvm::Fangrui Song2018-10-2213-0/+26
| | | | | | | | | | | | | | | | Summary: This allows simplifying references of llvm::foo with foo when the needs come in the future. Reviewers: courbet, gchatelet Reviewed By: gchatelet Subscribers: javed.absar, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D53455 llvm-svn: 344922
* [llvm-exegesis] X87 RFP setup code.Clement Courbet2018-10-191-7/+47
| | | | | | | | | | | | | | | | Summary: This was lost during refactoring in rL342644. Fix and simplify simplify value size handling: always go through a 80 bit value, because the value can be 1 byte). Add unit tests. Reviewers: gchatelet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D53423 llvm-svn: 344779
* [llvm-exegeis] Computing Latency configuration upfront so we can generate ↵Guillaume Chatelet2018-10-171-69/+168
| | | | | | | | | | | | | | | | many CodeTemplates at once. Summary: LatencyGenerator now computes all possible mode of serial execution for an Instruction upfront and generates CodeTemplate for the ones that give the best results (e.g. no need to generate a two instructions snippet when repeating a single one would do). The next step is to generate even more configurations for cases (e.g. for XOR we should generate "XOR EAX, EAX, EAX" and "XOR EAX, EAX, EBX") Reviewers: courbet Reviewed By: courbet Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D53320 llvm-svn: 344689
* [llvm-exegesis][NFC] Return many CodeTemplates instead of one.Guillaume Chatelet2018-10-151-5/+7
| | | | | | | | | | | | Summary: This is part one of the change where I simply changed the signature of the functions. More work need to be done to actually produce more than one CodeTemplate per instruction. Reviewers: courbet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D53209 llvm-svn: 344493
* [llvm-exegesis][NFC] Pass Instruction instead of bare OpcodeGuillaume Chatelet2018-10-101-3/+5
| | | | llvm-svn: 344145
* [llvm-exegesis][NFC] Code simplificationGuillaume Chatelet2018-10-101-1/+1
| | | | | | | | | | | | Summary: Simplify code by having LLVMState hold the RegisterAliasingTrackerCache. Reviewers: courbet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D53078 llvm-svn: 344143
* [llvm-exegesis][NFC] Fix typoGuillaume Chatelet2018-10-101-1/+1
| | | | | | | | | | Reviewers: courbet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D53075 llvm-svn: 344137
* [llvm-exegesis][NFC] moving code around.Guillaume Chatelet2018-09-271-47/+47
| | | | | | | | | | | | Summary: Renaming InstructionBuilder into InstructionTemplate and moving code generation tools from MCInstrDescView to CodeTemplate. Reviewers: courbet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D52592 llvm-svn: 343188
* [llvm-exegesis] Get rid of debug_string.Clement Courbet2018-09-262-15/+15
| | | | | | | | | | | | | | | | Summary: THis is a backwards-compatible change (existing files will work as expected). See PR39082. Reviewers: gchatelet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D52546 llvm-svn: 343108
* [llvm-exegesis] Output the unscaled value as well as the scaled one.Clement Courbet2018-09-262-18/+25
| | | | | | | | | | | | Summary: See PR38936 for context. Reviewers: gchatelet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D52500 llvm-svn: 343081
* [llvm-exegesis] Serializes registers initial values.Guillaume Chatelet2018-09-251-0/+3
| | | | | | | | | | | | Summary: Adds the registers initial values to the YAML output of llvm-exegesis. Reviewers: courbet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D52460 llvm-svn: 342982
* [llvm-exegesis] Fix broken test.Guillaume Chatelet2018-09-251-1/+1
| | | | llvm-svn: 342971
* [llvm-exegesis][NFC] Rewrite of the YAML serialization.Guillaume Chatelet2018-09-253-18/+18
| | | | | | | | | | | | | | Summary: This is a NFC in preparation of exporting the initial registers as part of the YAML dump Reviewers: courbet Reviewed By: courbet Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D52427 llvm-svn: 342967
* [llvm-exegesis] Fix broken build bots.Guillaume Chatelet2018-09-202-15/+19
| | | | | | | | | | Reviewers: javed.absar Subscribers: tschuett, courbet, llvm-commits Differential Revision: https://reviews.llvm.org/D52302 llvm-svn: 342646
* [llvm-exegesis] Improve Register Setup (roll forward of D51856).Guillaume Chatelet2018-09-206-204/+311
| | | | | | | | | | | | | | Summary: Added function to set a register to a particular value + tests. Add EFLAGS test, use new setRegTo instead of setRegToConstant. Reviewers: courbet, javed.absar Subscribers: llvm-commits, tschuett, mgorny Differential Revision: https://reviews.llvm.org/D52297 llvm-svn: 342644
* Revert rL342465: Added function to set a register to a particular value + tests.Simon Pilgrim2018-09-181-245/+165
| | | | | | rL342465 is breaking the MSVC buildbots. llvm-svn: 342490
* Revert rL342466: [llvm-exegesis] Improve Register Setup.Simon Pilgrim2018-09-186-69/+42
| | | | | | | | | | | | | | | | rL342465 is breaking the MSVC buildbots, but I need to revert this dependent revision as well. Summary: Added function to set a register to a particular value + tests. Add EFLAGS test, use new setRegTo instead of setRegToConstant. Reviewers: courbet, javed.absar Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D51856 llvm-svn: 342489
* [llvm-exegesis] Improve Register Setup.Guillaume Chatelet2018-09-186-42/+69
| | | | | | | | | | | | | | Summary: Added function to set a register to a particular value + tests. Add EFLAGS test, use new setRegTo instead of setRegToConstant. Reviewers: courbet, javed.absar Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D51856 llvm-svn: 342466
* Added function to set a register to a particular value + tests.Guillaume Chatelet2018-09-181-165/+245
| | | | llvm-svn: 342465
* Improve Register SetupGuillaume Chatelet2018-09-182-8/+71
| | | | llvm-svn: 342464
* [llvm-exegesis] Add predefined floating point values so we can test impact ↵Guillaume Chatelet2018-09-172-0/+72
| | | | | | | | | | | | | | of special values on latency. Summary: This will be useful to generate many configurations and test instruction regimes (NaN, Inf, subnormal, normal). Reviewers: courbet Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D51858 llvm-svn: 342369
* Revert r342148 (and follow-on fix attempts r342154, r342180, r342182, r342193)Nico Weber2018-09-152-2/+0
| | | | | | | Many bots buildling with make have been broken for several days, e.g. http://lab.llvm.org:8011/builders/lld-x86_64-darwin13 llvm-svn: 342336
* [NFC] Link LLVMCore into LLVMExegesisARMTests.Richard Diamond2018-09-131-0/+1
| | | | | | | Fixes missing `llvm::LLVMContext::~LLVMContext()` symbols w/ `BUILD_SHARED_LIBS`. llvm-svn: 342193
* LLVMExegesisX86Tests: link to LLVMCore, too.Roman Lebedev2018-09-131-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes build for me. Refs. D52054 [215/217] Linking CXX executable unittests/tools/llvm-exegesis/X86/LLVMExegesisX86Tests FAILED: unittests/tools/llvm-exegesis/X86/LLVMExegesisX86Tests : && /usr/bin/g++ -pipe -O2 -g0 -UNDEBUG -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -fdiagnostics-color -ffunction-sections -fdata-sections -pipe -O2 -g0 -UNDEBUG -fuse-ld=lld -Wl,--color-diagnostics -Wl,-allow-shlib-undefined -Wl,-O3 -Wl,--gc-sections unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/AssemblerTest.cpp.o unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/AnalysisTest.cpp.o unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/SnippetGeneratorTest.cpp.o unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/RegisterAliasingTest.cpp.o unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/TargetTest.cpp.o -o unittests/tools/llvm-exegesis/X86/LLVMExegesisX86Tests -Wl,-rpath,/build/llvm-build-GCC-release/lib lib/libLLVMMC.so.8svn lib/libLLVMMCParser.so.8svn lib/libLLVMObject.so.8svn lib/libLLVMSymbolize.so.8svn lib/libLLVMX86CodeGen.so.8svn lib/libLLVMX86AsmParser.so.8svn lib/libLLVMX86AsmPrinter.so.8svn lib/libLLVMX86Desc.so.8svn lib/libLLVMX86Disassembler.so.8svn lib/libLLVMX86Info.so.8svn lib/libLLVMX86Utils.so.8svn lib/libLLVMSupport.so.8svn -lpthread lib/libgtest_main.so.8svn lib/libgtest.so.8svn -lpthread lib/libLLVMExegesis.so.8svn lib/libLLVMExegesisX86.so.8svn && : ld.lld: error: undefined symbol: llvm::LLVMContext::~LLVMContext() >>> referenced by AssemblerTest.cpp >>> unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/AssemblerTest.cpp.o:(exegesis::(anonymous namespace)::X86MachineFunctionGeneratorTest_DISABLED_JitFunction_Test::TestBody()) ld.lld: error: undefined symbol: llvm::LLVMContext::~LLVMContext() >>> referenced by AssemblerTest.cpp >>> unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/AssemblerTest.cpp.o:(exegesis::(anonymous namespace)::X86MachineFunctionGeneratorTest_DISABLED_JitFunctionXOR32rr_Default_Test::TestBody()) ld.lld: error: undefined symbol: llvm::LLVMContext::~LLVMContext() >>> referenced by AssemblerTest.cpp >>> unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/AssemblerTest.cpp.o:(void exegesis::MachineFunctionGeneratorBaseTest::Check<int, int, int, int, int, int, int, int>(exegesis::ExegesisTarget const&, llvm::ArrayRef<unsigned int>, llvm::MCInst, int, int, int, int, int, int, int, int)) ld.lld: error: undefined symbol: llvm::LLVMContext::~LLVMContext() >>> referenced by AssemblerTest.cpp >>> unittests/tools/llvm-exegesis/X86/CMakeFiles/LLVMExegesisX86Tests.dir/AssemblerTest.cpp.o:(exegesis::(anonymous namespace)::X86MachineFunctionGeneratorTest_DISABLED_JitFunctionMOV32ri_Test::TestBody()) collect2: error: ld returned 1 exit status ninja: build stopped: subcommand failed. llvm-svn: 342182
* [llvm-exegesis][NFC] Split BenchmarkRunner classClement Courbet2018-09-131-33/+27
| | | | | | | | | | | | | | | Summary: The snippet-generation part goes to the SnippetGenerator class. This will allow benchmarking arbitrary code (see PR38437). Reviewers: gchatelet Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D51979 llvm-svn: 342117
* Add header guards to some headers that are missing themArgyrios Kyrtzidis2018-09-031-0/+5
| | | | | | | Also adjust some of dsymutil's headers to put the header guards at the top, otherwise the compiler will not recognize them as header guards. llvm-svn: 341323
* [llvm-exegesis] Renaming classes and functions.Guillaume Chatelet2018-08-031-57/+56
| | | | | | | | | | | | Summary: Functional No Op. Reviewers: gchatelet Subscribers: tschuett, courbet, llvm-commits Differential Revision: https://reviews.llvm.org/D50231 llvm-svn: 338836
* [llvm-exegesis] Rename InstructionInstance into InstructionBuilder.Guillaume Chatelet2018-08-021-47/+47
| | | | | | | | | | Summary: Non functional change. Subscribers: tschuett, courbet, llvm-commits Differential Revision: https://reviews.llvm.org/D50176 llvm-svn: 338701
* [llvm-exegesis] Provide a way to handle memory instructions.Guillaume Chatelet2018-08-016-18/+97
| | | | | | | | | | | | | | | | | Summary: And implement memory instructions on X86. This fixes PR36906. Reviewers: gchatelet Reviewed By: gchatelet Subscribers: lebedev.ri, filcab, mgorny, tschuett, RKSimon, llvm-commits Differential Revision: https://reviews.llvm.org/D48935 llvm-svn: 338567
* [llvm-exegesis] Adjust AArch64 unit testJohn Brawn2018-07-031-4/+19
| | | | | | | The signature of setRegToConstant changed in r336171, so adjust the AArch64 unit test in a similar way to how the X86 unit test was changed in that commit. llvm-svn: 336188
* [llvm-exegesis] Add an AArch64 targetJohn Brawn2018-07-033-0/+62
| | | | | | | | | The target does just enough to be able to run llvm-exegesis in latency mode for at least some opcodes. Differential Revision: https://reviews.llvm.org/D48780 llvm-svn: 336187
* [llvm-exegesis] ExegisX86Target::setRegToConstant() should depend on the ↵Clement Courbet2018-07-031-7/+133
| | | | | | | | | | | | | | subtarget features. Summary: This fixes PR38008. Reviewers: gchatelet, RKSimon Subscribers: tschuett, craig.topper, llvm-commits Differential Revision: https://reviews.llvm.org/D48820 llvm-svn: 336171
* [llvm-exegesis] Get the BenchmarkRunner from the ExegesisTarget.Clement Courbet2018-06-262-8/+6
| | | | | | | | | | | | | | | Summary: This allows targets to override code generation for some instructions. As an example of override, this also moves ad-hoc instruction filtering for X86 into the X86 ExegesisTarget. Reviewers: gchatelet Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D48587 llvm-svn: 335582
* Fix unsigned/signed comparison failure in unittest.Eric Christopher2018-06-251-1/+1
| | | | llvm-svn: 335547
* [llvm-exegesis][NFC] Remove unnecessary member variables.Clement Courbet2018-06-251-1/+1
| | | | llvm-svn: 335470
* [llvm-exegesis] Generate snippet setup code.Clement Courbet2018-06-253-8/+104
| | | | | | | | | | | | | | | Summary: This ensures that the snippet always sees the same values for registers, making measurements reproducible. This will also allow exploring different values. Reviewers: gchatelet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D48542 llvm-svn: 335465
* [llvm-exegesis] Add mechanism to add target-specific passes.Clement Courbet2018-06-201-1/+2
| | | | | | | | | | | | | | Summary: createX86FloatingPointStackifierPass is disabled until we handle TracksLiveness correctly. Reviewers: gchatelet Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D48360 llvm-svn: 335117
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