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path: root/lib/CodeGen/TargetLoweringBase.cpp
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* IR: add "cmpxchg weak" variant to support permitted failure.Tim Northover2014-06-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit adds a weak variant of the cmpxchg operation, as described in C++11. A cmpxchg instruction with this modifier is permitted to fail to store, even if the comparison indicated it should. As a result, cmpxchg instructions must return a flag indicating success in addition to their original iN value loaded. Thus, for uniformity *all* cmpxchg instructions now return "{ iN, i1 }". The second flag is 1 when the store succeeded. At the DAG level, a new ATOMIC_CMP_SWAP_WITH_SUCCESS node has been added as the natural representation for the new cmpxchg instructions. It is a strong cmpxchg. By default this gets Expanded to the existing ATOMIC_CMP_SWAP during Legalization, so existing backends should see no change in behaviour. If they wish to deal with the enhanced node instead, they can call setOperationAction on it. Beware: as a node with 2 results, it cannot be selected from TableGen. Currently, no use is made of the extra information provided in this patch. Test updates are almost entirely adapting the input IR to the new scheme. Summary for out of tree users: ------------------------------ + Legacy Bitcode files are upgraded during read. + Legacy assembly IR files will be invalid. + Front-ends must adapt to different type for "cmpxchg". + Backends should be unaffected by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210903 91177308-0d34-0410-b5e6-96231b3b80d8
* InitLibcallNames can take a Triple instead of a TargetMachine.Eric Christopher2014-06-02
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210045 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused variable.Eric Christopher2014-05-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209391 91177308-0d34-0410-b5e6-96231b3b80d8
* X86TTI: Adjust sdiv cost now that we can lower it on plain SSE2.Benjamin Kramer2014-04-27
| | | | | | | Includes a fix for a horrible typo that caused all SDIV costs to be slightly off :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207371 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r206749 till a final decision about the intrinsics is made.Michael Zolotukhin2014-04-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207313 91177308-0d34-0410-b5e6-96231b3b80d8
* Set default value of HasExtractBitsInsn to falseYi Jiang2014-04-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206803 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r206732. This time without optimization of branches.Michael Zolotukhin2014-04-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206749 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r206732 which is causing llc to crash on most of the build bots.Chandler Carruth2014-04-21
| | | | | | | | Original commit message: Implement builtins for safe division: safe.sdiv.iN, safe.udiv.iN, safe.srem.iN, safe.urem.iN (iN = i8, i61, i32, or i64). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206735 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement builtins for safe division: safe.sdiv.iN, safe.udiv.iN, safe.srem.iN,Michael Zolotukhin2014-04-21
| | | | | | | | safe.urem.iN (iN = i8, i16, i32, or i64). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206732 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] More 'nullptr' conversion. In some cases just using a boolean check ↵Craig Topper2014-04-14
| | | | | | instead of comparing to nullptr. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206142 91177308-0d34-0410-b5e6-96231b3b80d8
* Change shouldSplitVectorElementType to better match the description.Matt Arsenault2014-03-31
| | | | | | Pass the entire vector type, and not just the element. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205247 91177308-0d34-0410-b5e6-96231b3b80d8
* CodeGen: add sensible defaults for the ISD::FROUND operationTim Northover2014-03-29
| | | | | | Some exotic types didn't know how to handle FROUND, which ARM64 uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205088 91177308-0d34-0410-b5e6-96231b3b80d8
* CodeGenPrep: wrangle IR to exploit AArch64 tbz/tbnz inst.Tim Northover2014-03-29
| | | | | | | | | | | | | | | | Given IR like: %bit = and %val, #imm-with-1-bit-set %tst = icmp %bit, 0 br i1 %tst, label %true, label %false some targets can emit just a single instruction (tbz/tbnz in the AArch64 case). However, with ISel acting at the basic-block level, all three instructions need to be together for this to be possible. This adds another transformation to CodeGenPrep to expose these opportunities, if targets opt in via the hook. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205086 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Replace llvm::tie with std::tie.Benjamin Kramer2014-03-02
| | | | | | The old implementation is no longer needed in C++11. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202644 91177308-0d34-0410-b5e6-96231b3b80d8
* move getNameWithPrefix and getSymbol to TargetMachine.Rafael Espindola2014-02-19
| | | | | | | | | | TargetLoweringBase is implemented in CodeGen, so before this patch we had a dependency fom Target to CodeGen. This would show up as a link failure of llvm-stress when building with -DBUILD_SHARED_LIBS=ON. This fixes pr18900. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201711 91177308-0d34-0410-b5e6-96231b3b80d8
* Add back r201608, r201622, r201624 and r201625Rafael Espindola2014-02-19
| | | | | | | | | | | | | | r201608 made llvm corretly handle private globals with MachO. r201622 fixed a bug in it and r201624 and r201625 were changes for using private linkage, assuming that llvm would do the right thing. They all got reverted because r201608 introduced a crash in LTO. This patch includes a fix for that. The issue was that TargetLoweringObjectFile now has to be initialized before we can mangle names of private globals. This is trivially true during the normal codegen pipeline (the asm printer does it), but LTO has to do it manually. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201700 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r201622 and r201608.Daniel Jasper2014-02-19
| | | | | | | This causes the LLVMgold plugin to segfault. More information on the replies to r201608. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201669 91177308-0d34-0410-b5e6-96231b3b80d8
* Avoid an infinite cycle with private linkage and -f{data|function}-sections.Rafael Espindola2014-02-19
| | | | | | | | | | When outputting an object we check its section to find its name, but when looking for the section with -ffunction-section we look for the symbol name. Break the loop by requesting a name with the private prefix when constructing the section name. This matches the behavior before r201608. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201622 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR18743.Rafael Espindola2014-02-18
| | | | | | | | | | | | | | | | | | | | | | | | The IR @foo = private constant i32 42 is valid, but before this patch we would produce an invalid MachO from it. It was invalid because it would use an L label in a section where the liker needs the labels in order to atomize it. One way of fixing it would be to just reject this IR in the backend, but that would not be very front end friendly. What this patch does is use an 'l' prefix in sections that we know the linker requires symbols for atomizing them. This allows frontends to just use private and not worry about which sections they go to or how the linker handles them. One small issue with this strategy is that now a symbol name depends on the section, which is not available before codegen. This is not a problem in practice. The reason is that it only happens with private linkage, which will be ignored by the non codegen users (llvm-nm and llvm-ar). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201608 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename some member variables from TD to DL.Rafael Espindola2014-02-18
| | | | | | TargetData was renamed DataLayout back in r165242. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201581 91177308-0d34-0410-b5e6-96231b3b80d8
* TargetLowering: n * r where n > 2 should be an illegal addressing modeTom Stellard2014-02-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201433 91177308-0d34-0410-b5e6-96231b3b80d8
* Disable compare sinking in CodeGenPrepare when multiple condition registers ↵Hal Finkel2014-01-02
| | | | | | | | | | | | | | | | | | | are available As noted in the comment above CodeGenPrepare::OptimizeInst, which aggressively sinks compares to reduce pressure on the condition register(s), for targets such as PowerPC with multiple condition registers, this may not be the right thing to do. This adds an HasMultipleConditionRegisters boolean to TLI, and CodeGenPrepare::OptimizeInst is skipped when HasMultipleConditionRegisters is true. This functionality will be used by the PowerPC backend in an upcoming commit. Especially when the PowerPC backend starts tracking individual condition register bits as separate allocatable entities (which will happen in this upcoming commit), this sinking from CodeGenPrepare::OptimizeInst is significantly suboptimial. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198354 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the 's' DataLayout specificationRafael Espindola2014-01-01
| | | | | | | | | | | | | | | | | | | | | | | During the years there have been some attempts at figuring out how to align byval arguments. A look at the commit log suggests that they were * Use the ABI alignment. * When that was not sufficient for x86-64, I added the 's' specification to DataLayout. * When that was not sufficient Evan added the virtual getByValTypeAlignment. * When even that was not sufficient, we just got the FE to add the alignment to the byval. This patch is just a simple cleanup that removes my first attempt at fixing the problem. I also added an AArch64 implementation of getByValTypeAlignment to make sure this patch is a nop. I also left the 's' parsing for backward compatibility. I will send a short email to llvmdev about the change for anyone maintaining an out of tree target. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198287 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused variable from r195944.Lang Hames2013-11-29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195945 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor a lot of patchpoint/stackmap related code to simplify and make itLang Hames2013-11-29
| | | | | | | | | | | | | | | | | | | | | | | | target independent. Most of the x86 specific stackmap/patchpoint handling was necessitated by the use of the native address-mode format for frame index operands. PEI has now been modified to treat stackmap/patchpoint similarly to DEBUG_INFO, allowing us to use a simple, platform independent register/offset pair for frame indexes on stackmap/patchpoints. Notes: - Folding is now platform independent and automatically supported. - Emiting patchpoints with direct memory references now just involves calling the TargetLoweringBase::emitPatchPoint utility method from the target's XXXTargetLowering::EmitInstrWithCustomInserter method. (See X86TargetLowering for an example). - No more ugly platform-specific operand parsers. This patch shouldn't change the generated output for X86. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195944 91177308-0d34-0410-b5e6-96231b3b80d8
* Add addrspacecast instruction.Matt Arsenault2013-11-15
| | | | | | Patch by Michele Scandale! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194760 91177308-0d34-0410-b5e6-96231b3b80d8
* LegalizeDAG: allow libcalls for max/min atomic operationsTim Northover2013-10-25
| | | | | | | | | | | ARM processors without ldrex/strex need to be able to make libcalls for all atomic operations, including the newer min/max versions. The alternative would probably be expanding these operations in terms of cmpxchg (as x86 does always), but in the configurations where this matters code-size tends to be paramount so the libcall is more desirable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193398 91177308-0d34-0410-b5e6-96231b3b80d8
* SelectionDAG: Pass along the original argument/element type in ISD::InputArgTom Stellard2013-10-23
| | | | | | | | | | | | | | | | For some targets, it is useful to be able to look at the original type of an argument without having to dig through the original IR. This also fixes a bug in SelectionDAGBuilder where InputArg.PartOffset was not taking into account the offset of structure elements. Patch by: Justin Holewinski Tom Stellard: - Changed the type of ArgVT to EVT, so it can store non-simple types like v3i32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193214 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused TargetLowering field.Matt Arsenault2013-10-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193113 91177308-0d34-0410-b5e6-96231b3b80d8
* CodeGen: Emit a libcall if the target doesn't support 16-byte wide atomicsDavid Majnemer2013-10-18
| | | | | | | | | | | There are targets that support i128 sized scalars but cannot emit instructions that modify them directly. The proper thing to do is to emit a libcall. This fixes PR17481. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192957 91177308-0d34-0410-b5e6-96231b3b80d8
* SelectionDAG: Use correct pointer size when lowering function arguments v2Tom Stellard2013-08-26
| | | | | | | | | | | | | | | | This adds minimal support to the SelectionDAG for handling address spaces with different pointer sizes. The SelectionDAG should now correctly lower pointer function arguments to the correct size as well as generate the correct code when lowering getelementptr. This patch also updates the R600 DataLayout to use 32-bit pointers for the local address space. v2: - Add more helper functions to TargetLoweringBase - Use CHECK-LABEL for tests git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189221 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a llvm.copysign intrinsicHal Finkel2013-08-19
| | | | | | | | | | | | | | | | | | | | | This adds a llvm.copysign intrinsic; We already have Libfunc recognition for copysign (which is turned into the FCOPYSIGN SDAG node). In order to autovectorize calls to copysign in the loop vectorizer, we need a corresponding intrinsic as well. In addition to the expected changes to the language reference, the loop vectorizer, BasicTTI, and the SDAG builder (the intrinsic is transformed into an FCOPYSIGN node, just like the function call), this also adds FCOPYSIGN to a few lists in LegalizeVector{Ops,Types} so that vector copysigns can be expanded. In TargetLoweringBase::initActions, I've made the default action for FCOPYSIGN be Expand for vector types. This seems correct for all in-tree targets, and I think is the right thing to do because, previously, there was no way to generate vector-values FCOPYSIGN nodes (and most targets don't specify an action for vector-typed FCOPYSIGN). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188728 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Add in the stackprotector libcall.Michael Gottesman2013-08-12
| | | | | | | We support this libcall on all platforms except for OpenBSD (See lib/Codegen/StackProtector.cpp). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188193 91177308-0d34-0410-b5e6-96231b3b80d8
* Set ISD::FROUND to Expand by default for all typesHal Finkel2013-08-09
| | | | | | | | | | | For most libm ISD nodes, TargetLoweringBase::initActions sets the default scalar-type action to Expand, and leaves the vector-type action default as Legal. This is not appropriate for the new ISD::FROUND node (which no backend but PowerPC handles explicitly). Fixes PR16842. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188048 91177308-0d34-0410-b5e6-96231b3b80d8
* Add ISD::FROUND for libm round()Hal Finkel2013-08-07
| | | | | | | | | | | | | | | All libm floating-point rounding functions, except for round(), had their own ISD nodes. Recent PowerPC cores have an instruction for round(), and so here I'm adding ISD::FROUND so that round() can be custom lowered as well. For the most part, this is straightforward. I've added an intrinsic and a matching ISD node just like those for nearbyint() and friends. The SelectionDAG pattern I've named frnd (because ISD::FP_ROUND has already claimed fround). This will be used by the PowerPC backend in a follow-up commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187926 91177308-0d34-0410-b5e6-96231b3b80d8
* Add LLVMContext argument to getSetCCResultTypeMatt Arsenault2013-05-18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182180 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused ShouldFoldAtomicFences flag.Tim Northover2013-04-20
| | | | | | | | I think it's almost impossible to fold atomic fences profitably under LLVM/C++11 semantics. As a result, this is now unused and just cluttering up the target interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179940 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the target options specified on a function to reset the back-end.Bill Wendling2013-04-05
| | | | | | | | | During LTO, the target options on functions within the same Module may change. This would necessitate resetting some of the back-end. Do this for X86, because it's a Friday afternoon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178917 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the old CodePlacementOpt pass.Benjamin Kramer2013-03-29
| | | | | | It was superseded by MachineBlockPlacement and disabled by default since LLVM 3.1. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178349 91177308-0d34-0410-b5e6-96231b3b80d8
* Set properties for f128 type.Akira Hatanaka2013-03-01
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176378 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR10475Michael Liao2013-03-01
| | | | | | | | | | | | | | | | - ISD::SHL/SRL/SRA must have either both scalar or both vector operands but TLI.getShiftAmountTy() so far only return scalar type. As a result, backend logic assuming that breaks. - Rename the original TLI.getShiftAmountTy() to TLI.getScalarShiftAmountTy() and re-define TLI.getShiftAmountTy() to return target-specificed scalar type or the same vector type as the 1st operand. - Fix most TICG logic assuming TLI.getShiftAmountTy() a simple scalar type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176364 91177308-0d34-0410-b5e6-96231b3b80d8
* Update TargetLowering ivars for name policy.Jim Grosbach2013-02-20
| | | | | | | | | | | http://llvm.org/docs/CodingStandards.html#name-types-functions-variables-and-enumerators-properly ivars should be camel-case and start with an upper-case letter. A few in TargetLowering were starting with a lower-case letter. No functional change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175667 91177308-0d34-0410-b5e6-96231b3b80d8
* enable SDISel sincos optimization for GNU environmentsPaul Redmond2013-02-15
| | | | | | | | | | | | | - add sincos to runtime library if target triple environment is GNU - added canCombineSinCosLibcall() which checks that sincos is in the RTL and if the environment is GNU then unsafe fpmath is enabled (required to preserve errno) - extended sincos-opt lit test Reviewed by: Hal Finkel git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175283 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach SDISel to combine fsin / fcos into a fsincos node if the followingEvan Cheng2013-01-29
| | | | | | | | | | | | | | | | | | | conditions are met: 1. They share the same operand and are in the same BB. 2. Both outputs are used. 3. The target has a native instruction that maps to ISD::FSINCOS node or the target provides a sincos library call. Implemented the generic optimization in sdisel and enabled it for Mac OSX. Also added an additional optimization for x86_64 Mac OSX by using an alternative entry point __sincos_stret which returns the two results in xmm0 / xmm1. rdar://13087969 PR13204 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173755 91177308-0d34-0410-b5e6-96231b3b80d8
* Split TargetLowering into a CodeGen and a SelectionDAG part.Benjamin Kramer2013-01-11
This fixes some of the cycles between libCodeGen and libSelectionDAG. It's still a complete mess but as long as the edges consist of virtual call it doesn't cause breakage. BasicTTI did static calls and thus broke some build configurations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172246 91177308-0d34-0410-b5e6-96231b3b80d8
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