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* [SelectionDAG] Remove a check for type being a vector type after calling ↵Craig Topper2017-09-111-2/+0
| | | | | | | | getShiftAmountTy. NFCI getShiftAmountTy already returns the vector type when called for vectors. llvm-svn: 312924
* Fix typoMatt Arsenault2017-09-111-1/+1
| | | | llvm-svn: 312919
* Fixed a bug in splitting Scatter operation in the Type Legalizer.Elena Demikhovsky2017-09-111-7/+6
| | | | | | | | | After the split of the Scatter operation, the order of the new instructions is well defined - Lo goes before Hi. Otherwise the semantic of Scatter (from LSB to MSB) is broken. I'm chaining 2 nodes to prevent reordering. Differential Revision https://reviews.llvm.org/D37670 llvm-svn: 312894
* RegAllocFast: Fix warning; NFCMatthias Braun2017-09-091-2/+1
| | | | llvm-svn: 312852
* RegAllocFast: Cleanup; NFCMatthias Braun2017-09-092-300/+297
| | | | | | | | | | | | | - Use range based for - Variable names should start with upper case - Add `const` - Change class name to match filename - Fix doxygen comments - Use MCPhysReg instead of unsigned - Use references instead of pointers where things cannot be nullptr - Misc coding style improvements llvm-svn: 312846
* RegAllocFast: Move vector to class level to avoid reallocation; NFCMatthias Braun2017-09-091-2/+5
| | | | llvm-svn: 312845
* RegAllocFast: Remove write-only set; NFCMatthias Braun2017-09-091-10/+0
| | | | llvm-svn: 312844
* Fix a bug for rL312641.Wei Mi2017-09-081-4/+11
| | | | | | | | | | | rL312641 Allowed llvm.memcpy/memset/memmove to be tail calls when parent function return the intrinsics's first argument. However on arm-none-eabi platform, llvm.memcpy will be expanded to __aeabi_memcpy which doesn't have return value. The fix is to check the libcall name after expansion to match "memcpy/memset/memmove" before allowing those intrinsic to be tail calls. llvm-svn: 312799
* Preserve existing regs when adding pristines to LivePhysRegs/LiveRegUnitsKrzysztof Parzyszek2017-09-082-14/+43
| | | | | | Differential Revision: https://reviews.llvm.org/D37600 llvm-svn: 312797
* Fix a crash when emitting debug info for multi-reg function argumentsAdrian Prantl2017-09-081-14/+18
| | | | | | | | | by reusing more of the existing machinery This is a follow-up to r312169. Thanks to Björn Pettersson for the testcase! llvm-svn: 312773
* [XRay][CodeGen][PowerPC] Fix tail exit codegen for XRay in PPCDean Michael Berris2017-09-081-16/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: This fixes code-gen for XRay in PPC. The regression wasn't caught by codegen tests which we add in this change. What happened was the following: - For tail exits, we used to unconditionally prepend the returns/exits with a pseudo-instruction that gets lowered to the instrumentation sled (and leave the actual return/exit instruction as-is). - Changes to the XRay instrumentation pass caused the tail exits to suddenly also emit the tail exit pseudo-instruction, since the check for whether a return instruction was also a call instruction meant it was a tail exit instruction. - None of the tests caught the regression either due to non-existent tests, or the tests being disabled/removed for continuous breakage. This change re-introduces some of the basic tests and verifies that we're back to a state that allows the back-end to generate appropriate XRay instrumented binaries for PPC in the presence of tail exits. Reviewers: echristo, timshen Subscribers: nemanjai, kbarton, llvm-commits Differential Revision: https://reviews.llvm.org/D37570 llvm-svn: 312772
* Sink some IntrinsicInst.h and Intrinsics.h out of llvm/includeReid Kleckner2017-09-071-0/+1
| | | | | | | Many of these uses can get by with forward declarations. Hopefully this speeds up compilation after adding a single intrinsic. llvm-svn: 312759
* Revert r312318, r312325, r312424, r312489Richard Trieu2017-09-071-1/+0
| | | | | | | | | | r312318 - Debug info for variables whose type is shrinked to bool r312325, r312424, r312489 - Test case for r312318 Revision 312318 introduced a null dereference bug. Details in https://bugs.llvm.org/show_bug.cgi?id=34490 llvm-svn: 312758
* [DWARF] Line 0 should not have a discriminator.Paul Robinson2017-09-071-2/+2
| | | | | | | | It's meaningless and takes up extra space in the line table. Differential Revision: https://reviews.llvm.org/D37364 llvm-svn: 312751
* DAG: Allow creating extract_vector_elt post-legalizeMatt Arsenault2017-09-071-1/+4
| | | | | | | | | | | | | | | | Fixes some combine issues for AMDGPU where we weren't getting the many extract_vector_elt combines expected in a future patch. This should really be checking isOperationLegalOrCustom on the extract. That improves a number of x86 lit tests, but a few get stuck in an infinite loop from one place where a similar looking extract is created. I have a different workaround in the backend for that which keeps many of those improvements, but also adds a few regressions. llvm-svn: 312730
* [MachineCombiner] Update instruction depths incrementally for large BBs.Florian Hahn2017-09-072-23/+90
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: For large basic blocks with lots of combinable instructions, the MachineTraceMetrics computations in MachineCombiner can dominate the compile time, as computing the trace information is quadratic in the number of instructions in a BB and it's relevant successors/predecessors. In most cases, knowing the instruction depth should be enough to make combination decisions. As we already iterate over all instructions in a basic block, the instruction depth can be computed incrementally. This reduces the cost of machine-combine drastically in cases where lots of instructions are combined. The major drawback is that AFAIK, computing the critical path length cannot be done incrementally. Therefore we only compute instruction depths incrementally, for basic blocks with more instructions than inc_threshold. The -machine-combiner-inc-threshold option can be used to set the threshold and allows for easier experimenting and checking if using incremental updates for all basic blocks has any impact on the performance. Reviewers: sanjoy, Gerolf, MatzeB, efriedma, fhahn Reviewed By: fhahn Subscribers: kiranchandramohan, javed.absar, efriedma, llvm-commits Differential Revision: https://reviews.llvm.org/D36619 llvm-svn: 312719
* [MachineTraceMetrics] Add computeDepth function (NFCI).Florian Hahn2017-09-071-54/+46
| | | | | | | | | | | | | | | | Summary: This function is used in D36619 to update the instruction depths incrementally. Reviewers: efriedma, Gerolf, MatzeB, fhahn Reviewed By: fhahn Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D36696 llvm-svn: 312714
* Revert "[RegAlloc] Make sure live-ranges reflect the state of the IR when ↵Jonas Paulsson2017-09-072-8/+2
| | | | | | | | | | removing them" This temporarily reverts commit 463fa38 (r311401). See https://bugs.llvm.org/show_bug.cgi?id=34502 llvm-svn: 312708
* Insert IMPLICIT_DEFS for undef uses in tail mergingMatthias Braun2017-09-064-60/+118
| | | | | | | | | | | | | | | | | | | | | Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
* [IfConversion] Remove kill flags from common instructions as wellKrzysztof Parzyszek2017-09-061-4/+6
| | | | | | | | | | | | | | | | | | | When if-converting a diamond, two separate blocks will be placed back to back to form a straight line code. To ensure correctness of the liveness information, any registers that are live in the second block should not be killed in the first block, even if they were in the original code. Additionally, when the two blocks share common instructions at the beginning, these instructions will not be duplicated, but only placed once, before both of the blocks. Since the function "isIdenticalTo" (as used here) ignores kill flags, the common initial code in one block may have a kill flag for a register that is live in the other block. Because the code that removes kill flags only runs for the non-common parts of the predicated blocks, a kill flag mismatch in the common code could still lead to a live register being killed prematurely. llvm-svn: 312654
* [TailCall] Allow llvm.memcpy/memset/memmove to be tail calls when parentWei Mi2017-09-061-0/+11
| | | | | | | | | | | | | | | | | function return the intrinsics's first argument. llvm.memcpy/memset/memmove return void but they will return the first argument after they are expanded as libcalls. Now if the parent function has any return value, llvm.memcpy cannot be turned into tail call after expansion. The patch is to handle that case in SelectionDAGBuilder so when caller function return the same value as the first argument of llvm.memcpy, tail call is allowed. Differential Revision: https://reviews.llvm.org/D37406 llvm-svn: 312641
* [DAGCombiner] When combining EXTRACT_SUBVECTOR of a BUILD_VECTOR, make sure ↵Craig Topper2017-09-061-2/+3
| | | | | | we don't create a BUILD_VECTOR with an illegal type after type legalization. llvm-svn: 312621
* [CodeView] Don't output S_UDTs for nested typedefs.Zachary Turner2017-09-051-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | S_UDT records are basically the "bridge" between the debugger's expression evaluator and the type information. If you type (Foo*)nullptr into the watch window, the debugger looks for an S_UDT record named Foo. If it can find one, it displays your type. Otherwise you get an error. We have always understood this to mean that if you have code like this: struct A { int X; }; struct B { typedef A AT; AT Member; }; that you will get 3 S_UDT records. "A", "B", and "B::AT". Because if you were to type (B::AT*)nullptr into the debugger, it would need to find an S_UDT record named "B::AT". But "B::AT" is actually the S_UDT record that would be generated if B were a namespace, not a struct. So the debugger needs to be able to distinguish this case. So what it does is: 1. Look for an S_UDT named "B::AT". If it finds one, it knows that AT is in a namespace. 2. If it doesn't find one, split at the scope resolution operator, and look for an S_UDT named B. If it finds one, look up the type for B, and then look for AT as one of its members. With this algorithm, S_UDT records for nested typedefs are not just unnecessary, but actually wrong! The results of implementing this in clang are dramatic. It cuts our /DEBUG:FASTLINK PDB sizes by more than 50%, and we go from being ~20% larger than MSVC PDBs on average, to ~40% smaller. It also slightly speeds up link time. We get about 10% faster links than without this patch. Differential Revision: https://reviews.llvm.org/D37410 llvm-svn: 312583
* Add llvm.codeview.annotation to implement MSVC __annotationReid Kleckner2017-09-057-5/+56
| | | | | | | | | | | | | | | | | | Summary: This intrinsic represents a label with a list of associated metadata strings. It is modelled as reading and writing inaccessible memory so that it won't be removed as dead code. I think the intention is that the annotation strings should appear at most once in the debug info, so I marked it noduplicate. We are allowed to inline code with annotations as long as we strip the annotation, but that can be done later. Reviewers: majnemer Subscribers: eraman, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D36904 llvm-svn: 312569
* Revert "Re-enable "[MachineCopyPropagation] Extend pass to do COPY source ↵Sam McCall2017-09-043-580/+23
| | | | | | | | | | forwarding"" This crashes on boringSSL on PPC (will send reduced testcase) This reverts commit r312328. llvm-svn: 312490
* [XRay][CodeGen] Use PIC-friendly code in XRay sleds and remove synthetic ↵Dean Michael Berris2017-09-041-28/+25
| | | | | | | | | | | | | | | | | references in .text Summary: This is a re-roll of D36615 which uses PLT relocations in the back-end to the call to __xray_CustomEvent() when building in -fPIC and -fxray-instrument mode. Reviewers: pcc, djasper, bkramer Subscribers: sdardis, javed.absar, llvm-commits Differential Revision: https://reviews.llvm.org/D37373 llvm-svn: 312466
* [X86] Fix crash on assert of non-simple type after type-legalizationAyman Musa2017-09-031-5/+7
| | | | | | | | | | The function combineShuffleToVectorExtend in DAGCombine might generate an illegal typed node after "legalize types" phase, causing assertion on non-simple type to fail afterwards. Adding a type check in case the combine is running after the type legalize pass. Differential Revision: https://reviews.llvm.org/D37330 llvm-svn: 312438
* [MIParser] Ensure getHexUint doesn't produce APInts with a bitwidth of 0Jessica Paquette2017-09-011-2/+5
| | | | | | | | | | | | | | | | | | | | | If getHexUint reads in a hex 0, it will create an APInt with a value of 0. The number of active bits on this APInt is used to calculate the bitwidth of Result. The number of active bits is defined as an APInt's bitwidth - its number of leading 0s. Since this APInt is 0, its bitwidth and number of leading 0s are equal. Thus, Result is constructed with a bitwidth of 0, triggering an APInt assert. This commit fixes that by checking if the APInt is equal to 0, and setting the bitwidth to 32 if it is. Otherwise, it sets the bitwidth using getActiveBits. This caused issues when compiling MIR files with successor probabilities. In the case that a successor is tagged with a probability of 0, this assert would fire on debug builds. https://reviews.llvm.org/D37401 llvm-svn: 312387
* LiveIntervalAnalysis: Fix alias regunit reserved definitionMatthias Braun2017-09-013-3/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A register in CodeGen can be marked as reserved: In that case we consider the register always live and do not use (or rather ignore) kill/dead/undef operand flags. LiveIntervalAnalysis however tracks liveness per register unit (not per register). We already needed adjustments for this in r292871 to deal with super/sub registers. However I did not look at aliased register there. Looking at ARM: FPSCR (regunits FPSCR, FPSCR~FPSCR_NZCV) aliases with FPSCR_NZCV (regunits FPSCR_NZCV, FPSCR~FPSCR_NZCV) hence they share a register unit (FPSCR~FPSCR_NZCV) that represents the aliased parts of the registers. This shared register unit was previously considered non-reserved, however given that we uses of the reserved FPSCR potentially violate some rules (like uses without defs) we should make FPSCR~FPSCR_NZCV reserved too and stop tracking liveness for it. This patch: - Defines a register unit as reserved when: At least for one root register, the root register and all its super registers are reserved. - Adjust LiveIntervals::computeRegUnitRange() for new reserved definition. - Add MachineRegisterInfo::isReservedRegUnit() to have a canonical way of testing. - Stop computing LiveRanges for reserved register units in HMEditor even with UpdateFlags enabled. - Skip verification of uses of reserved reg units in the machine verifier (this usually didn't happen because there would be no cached liverange but there is no guarantee for that and I would run into this case before the HMEditor tweak, so may as well fix the verifier too). Note that this should only affect ARMs FPSCR/FPSCR_NZCV registers today; aliased registers are rarely used, the only other cases are hexagons P0-P3/P3_0 and C8/USR pairs which are not mixing reserved/non-reserved registers in an alias. Differential Revision: https://reviews.llvm.org/D37356 llvm-svn: 312348
* Re-enable "[MachineCopyPropagation] Extend pass to do COPY source forwarding"Geoff Berry2017-09-013-23/+580
| | | | | | | | | | | | | | | | | | | | | | | | | | | Issues addressed since original review: - Moved removal of dead instructions found by LiveIntervals::shrinkToUses() outside of loop iterating over instructions to avoid instructions being deleted while pointed to by iterator. - Fixed ARMLoadStoreOptimizer bug exposed by this change in r311907. - The pass no longer forwards COPYs to physical register uses, since doing so can break code that implicitly relies on the physical register number of the use. - The pass no longer forwards COPYs to undef uses, since doing so can break the machine verifier by creating LiveRanges that don't end on a use (since the undef operand is not considered a use). [MachineCopyPropagation] Extend pass to do COPY source forwarding This change extends MachineCopyPropagation to do COPY source forwarding. This change also extends the MachineCopyPropagation pass to be able to be run during register allocation, after physical registers have been assigned, but before the virtual registers have been re-written, which allows it to remove virtual register COPY LiveIntervals that become dead through the forwarding of all of their uses. llvm-svn: 312328
* Reland rL312315: [MergeICmps] MergeICmps is a new optimization pass that ↵Clement Courbet2017-09-011-0/+8
| | | | | | | | | | turns chains of integer Add missing header. This reverts commit 86dd6335cf7607af22f383a9a8e072ba929848cf. llvm-svn: 312322
* Debug info for variables whose type is shrinked to boolStrahinja Petrovic2017-09-011-0/+1
| | | | | | | | | | | | | This patch provides such debug information for integer variables whose type is shrinked to bool by providing dwarf expression which returns either constant initial value or other value. Patch by Nikola Prica. Differential Revision: https://reviews.llvm.org/D35994 llvm-svn: 312318
* Revert "[MergeICmps] MergeICmps is a new optimization pass that turns chains ↵Clement Courbet2017-09-011-8/+0
| | | | | | | | | | of integer" Break build This reverts commit d07ab866f7f88f81e49046d691a80dcd32d7198b. llvm-svn: 312317
* [MergeICmps] MergeICmps is a new optimization pass that turns chains of integerClement Courbet2017-09-011-0/+8
| | | | | | | | | | | | | | | | | comparisons into memcmp. Thanks to recent improvements in the LLVM codegen, the memcmp is typically inlined as a chain of efficient hardware comparisons. This typically benefits C++ member or nonmember operator==(). For now this is disabled by default until: - https://bugs.llvm.org/show_bug.cgi?id=33329 is complete - Benchmarks show that this is always useful. Differential Revision: https://reviews.llvm.org/D33987 llvm-svn: 312315
* [MachineOutliner] Recommit r312194, missed optimization remarksJessica Paquette2017-08-311-1/+36
| | | | | | | | | | | | | Before, this commit caused a buildbot failure: http://bb.pgr.jp/builders/test-llvm-i686-linux-RA/builds/6026/steps/test_llvm/logs/LLVM%20%3A%3A%20CodeGen__AArch64__machine-outliner-remarks.ll This was caused by the Key value in DiagnosticInfoOptimizationBase being deallocated before emitting the remarks defined in MachineOutliner.cpp. As of r312277 this should no longer be an issue. llvm-svn: 312280
* [DAGCombiner] Do a better job of ensuring we don't split elements when ↵Craig Topper2017-08-311-4/+7
| | | | | | combining an extract_subvector of a bitcasted build_vector. llvm-svn: 312253
* [codeview] Generalize DIExpression parsing to handle load chainsReid Kleckner2017-08-314-42/+46
| | | | | | | | | | | | | | | Summary: Hopefully this also clarifies exactly when and why we're rewriting certiain S_LOCALs using reference types: We're using the reference type to stand in for a zero-offset load. Reviewers: inglorion Subscribers: llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D37309 llvm-svn: 312247
* Revert r311525: "[XRay][CodeGen] Use PIC-friendly code in XRay sleds; remove ↵Daniel Jasper2017-08-311-25/+28
| | | | | | | | synthetic references in .text" Breaks builds internally. Will forward repo instructions to author. llvm-svn: 312243
* Revert r312194: "[MachineOutliner] Add missed optimization remarks for the ↵Daniel Jasper2017-08-311-36/+1
| | | | | | | | | outliner." Breaks on buildbot: http://bb.pgr.jp/builders/test-llvm-i686-linux-RA/builds/6026/steps/test_llvm/logs/LLVM%20%3A%3A%20CodeGen__AArch64__machine-outliner-remarks.ll llvm-svn: 312219
* Temporarily revert "Update branch coalescing to be a PowerPC specific pass"Eric Christopher2017-08-314-0/+763
| | | | | | | | From comments and code review it wasn't intended to be enabled by default yet. This reverts commit r311588. llvm-svn: 312214
* [MachineOutliner] Add missed optimization remarks for the outliner.Jessica Paquette2017-08-301-1/+36
| | | | | | | | | | | | | | This adds missed optimization remarks which report viable candidates that were not outlined because they would increase code size. Other remarks will come in separate commits. This will help to diagnose code size regressions and changes in outliner behaviour in projects using the outliner. https://reviews.llvm.org/D37085 llvm-svn: 312194
* Revert r312154 "Re-enable "[MachineCopyPropagation] Extend pass to do COPY ↵Hans Wennborg2017-08-303-577/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | source forwarding"" It caused PR34387: Assertion failed: (RegNo < NumRegs && "Attempting to access record for invalid register number!") > Issues identified by buildbots addressed since original review: > - Fixed ARMLoadStoreOptimizer bug exposed by this change in r311907. > - The pass no longer forwards COPYs to physical register uses, since > doing so can break code that implicitly relies on the physical > register number of the use. > - The pass no longer forwards COPYs to undef uses, since doing so > can break the machine verifier by creating LiveRanges that don't > end on a use (since the undef operand is not considered a use). > > [MachineCopyPropagation] Extend pass to do COPY source forwarding > > This change extends MachineCopyPropagation to do COPY source forwarding. > > This change also extends the MachineCopyPropagation pass to be able to > be run during register allocation, after physical registers have been > assigned, but before the virtual registers have been re-written, which > allows it to remove virtual register COPY LiveIntervals that become dead > through the forwarding of all of their uses. llvm-svn: 312178
* SelectionDAG: Emit correct debug info for multi-register function arguments.Adrian Prantl2017-08-301-0/+21
| | | | | | | | | Previously we would just describe the first register and then call it quits. This patch emits fragment expressions for each register. <rdar://problem/34075307> llvm-svn: 312169
* Refactor DIBuilder::createFragmentExpression into a static DIExpression memberAdrian Prantl2017-08-301-11/+8
| | | | | | NFC llvm-svn: 312165
* [GISel]: Add a clean up combiner during legalization.Aditya Nandakumar2017-08-301-101/+60
| | | | | | | | | | | Added a combiner which can clean up truncs/extends that are created in order to make the types work during legalization. Also moved the combineMerges to the LegalizeCombiner. https://reviews.llvm.org/D36880 llvm-svn: 312158
* Re-enable "[MachineCopyPropagation] Extend pass to do COPY source forwarding"Geoff Berry2017-08-303-23/+577
| | | | | | | | | | | | | | | | | | | | | | | Issues identified by buildbots addressed since original review: - Fixed ARMLoadStoreOptimizer bug exposed by this change in r311907. - The pass no longer forwards COPYs to physical register uses, since doing so can break code that implicitly relies on the physical register number of the use. - The pass no longer forwards COPYs to undef uses, since doing so can break the machine verifier by creating LiveRanges that don't end on a use (since the undef operand is not considered a use). [MachineCopyPropagation] Extend pass to do COPY source forwarding This change extends MachineCopyPropagation to do COPY source forwarding. This change also extends the MachineCopyPropagation pass to be able to be run during register allocation, after physical registers have been assigned, but before the virtual registers have been re-written, which allows it to remove virtual register COPY LiveIntervals that become dead through the forwarding of all of their uses. llvm-svn: 312154
* [codeview] make DbgVariableLocation::extractFromMachineInstruction use OptionalBob Haarman2017-08-303-29/+31
| | | | | | | | | | | | | | | | Summary: DbgVariableLocation::extractFromMachineInstruction originally returned a boolean indicating success. This change makes it return an Optional<DbgVariableLocation> so we cannot try to access the fields of the struct if they aren't valid. Reviewers: aprantl, rnk, zturner Subscribers: llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D37279 llvm-svn: 312143
* Re-land MachineInstr: Reason locally about some memory objects before going ↵Balaram Makam2017-08-301-17/+43
| | | | | | | | | | | | | | | | | | | | to AA. Summary: Reverts r311008 to reinstate r310825 with a fix. Refine alias checking for pseudo vs value to be conservative. This fixes the original failure in builtbot unittest SingleSource/UnitTests/2003-07-09-SignedArgs. Reviewers: hfinkel, nemanjai, efriedma Reviewed By: efriedma Subscribers: bjope, mcrosier, nhaehnle, javed.absar, llvm-commits Differential Revision: https://reviews.llvm.org/D36900 llvm-svn: 312126
* [codeview] add missing break in CodeGen/AsmPrinter/DebugHandlerBase.cppBob Haarman2017-08-291-0/+1
| | | | llvm-svn: 312055
* [CodeGen] Fix some Clang-tidy modernize-use-using and Include What You Use ↵Eugene Zelenko2017-08-298-180/+332
| | | | | | warnings; other minor fixes (NFC). llvm-svn: 312053
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