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* [RISCV] Add support for -ffixed-xX flagsSimon Cook2019-10-221-0/+5
| | | | | | | | | | | This adds support for reserving GPRs such that the compiler will not choose a register for register allocation. The implementation follows the same design as for AArch64; each reserved register becomes a target feature and used for getting the reserved registers for a given MachineFunction. The backend checks that it does not need to write to any reserved register; if it does a relevant error is generated. Differential Revision: https://reviews.llvm.org/D67185
* [RISCV] Switch to the Machine SchedulerLuis Marques2019-09-171-0/+1
| | | | | | | | | Most of the test changes are trivial instruction reorderings and differing register allocations, without any obvious performance impact. Differential Revision: https://reviews.llvm.org/D66973 llvm-svn: 372106
* Revert Patch from PhabricatorLuis Marques2019-09-171-1/+0
| | | | | | This reverts r372092 (git commit e38695a0255c9e7b53639f349f8101bae1ce5c04) llvm-svn: 372104
* Patch from PhabricatorLuis Marques2019-09-171-0/+1
| | | | llvm-svn: 372092
* [RISCV] Add support for RVC HINT instructionsLuis Marques2019-08-211-0/+2
| | | | | | | | | The hint instructions are enabled by default (if the standard C extension is enabled). To disable them pass -mattr=-rvc-hints. Differential Revision: https://reviews.llvm.org/D62592 llvm-svn: 369528
* [RISCV GlobalISel] Adding initial GlobalISel infrastructureDaniel Sanders2019-08-201-0/+17
| | | | | | | | | | | | | | | | | | | Summary: Add an initial GlobalISel skeleton for RISCV. It can only run ir translator for `ret void`. Patch by Andrew Wei Reviewers: asb, sabuasal, apazos, lenary, simoncook, lewis-revill, edward-jones, rogfer01, xiangzhai, rovka, Petar.Avramovic, mgorny, dsanders Reviewed By: dsanders Subscribers: pzheng, s.egerton, dsanders, hiraditya, rbar, johnrusso, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, psnobl, benna, Jim, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D65219 llvm-svn: 369467
* [RISCV] Add basic RV32E definitions and MC layer supportAlex Bradbury2019-03-221-0/+2
| | | | | | | | | | | | | | | | | | | | | The RISC-V ISA defines RV32E as an alternative "base" instruction set encoding, that differs from RV32I by having only 16 rather than 32 registers. This patch adds basic definitions for RV32E as well as MC layer support (assembling, disassembling) and tests. The only supported ABI on RV32E is ILP32E. Add a new RISCVFeatures::validate() helper to RISCVUtils which can be called from codegen or MC layer libraries to validate the combination of TargetTriple and FeatureBitSet. Other targets have similar checks (e.g. erroring if SPE is enabled on PPC64 or oddspreg + o32 ABI on Mips), but they either duplicate the checks (Mips), or fail to check for both codegen and MC codepaths (PPC). Codegen for the ILP32E ABI support and RV32E codegen are left for a future patch/patches. Differential Revision: https://reviews.llvm.org/D59470 llvm-svn: 356744
* [RISCV] Support -target-abi at the MC layer and for codegenAlex Bradbury2019-03-091-3/+7
| | | | | | | | | | | | | | | | This patch adds proper handling of -target-abi, as accepted by llvm-mc and llc. Lowering (codegen) for the hard-float ABIs will follow in a subsequent patch. However, this patch does add MC layer support for the hard float and RVE ABIs (emission of the appropriate ELF flags https://github.com/riscv/riscv-elf-psabi-doc/blob/master/riscv-elf.md#-file-header). ABI parsing must be shared between codegen and the MC layer, so we add computeTargetABI to RISCVUtils. A warning will be printed if an invalid or unrecognized ABI is given. Differential Revision: https://reviews.llvm.org/D59023 llvm-svn: 355771
* [RISCV][NFC] Move some std::string to StringRefAlex Bradbury2019-02-191-2/+2
| | | | llvm-svn: 354333
* Update the file headers across all of the LLVM projects in the monorepoChandler Carruth2019-01-191-4/+3
| | | | | | | | | | | | | | | | | 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
* [RISCV] Define FeatureRelax and shouldForceRelocation for RISCV linker ↵Shiva Chen2018-05-151-0/+2
| | | | | | | | | | | | | | relaxation 1. Deine FeatureRelax to enable/disable linker relaxation. 2. Define shouldForceRelocation to preserve relocation types even if the fixup can be resolved when linker relaxation enabled. This is necessary for correctness as offsets may change during relaxation. Differential Revision: https://reviews.llvm.org/D46674 llvm-svn: 332318
* [RISCV] MC layer support for load/store instructions of the C (compressed) ↵Alex Bradbury2017-12-071-0/+2
| | | | | | | | | | extension Differential Revision: https://reviews.llvm.org/D40001 Patch by Shiva Chen. llvm-svn: 320037
* [RISCV] MC layer support for the standard RV32D instruction set extensionAlex Bradbury2017-12-071-0/+2
| | | | | | | | | | | As the FPR32 and FPR64 registers have the same names, use validateTargetOperandClass in RISCVAsmParser to coerce a parsed FPR32 to an FPR64 when necessary. The rest of this patch is very similar to the RV32F patch. Differential Revision: https://reviews.llvm.org/D39895 llvm-svn: 320023
* [RISCV] MC layer support for the standard RV32F instruction set extensionAlex Bradbury2017-12-071-0/+2
| | | | | | | | | | | | | The most interesting part of this patch is probably the handling of rounding mode arguments. Sadly, the RISC-V assembler handles floating point rounding modes as a special "argument" when it would be more consistent to handle them like the atomics, opcode suffixes. This patch supports parsing this optional parameter, using InstAlias to allow parsing these floating point instructions when no rounding mode is specified. Differential Revision: https://reviews.llvm.org/D39893 llvm-svn: 320020
* Fix a bunch more layering of CodeGen headers that are in TargetDavid Blaikie2017-11-171-1/+1
| | | | | | | | All these headers already depend on CodeGen headers so moving them into CodeGen fixes the layering (since CodeGen depends on Target, not the other way around). llvm-svn: 318490
* [RISCV] MC layer support for the standard RV32A instruction set extensionAlex Bradbury2017-11-091-1/+3
| | | | llvm-svn: 317791
* [RISCV] MC layer support for the standard RV32M instruction set extensionAlex Bradbury2017-11-091-0/+2
| | | | llvm-svn: 317788
* [RISCV] Initial codegen support for ALU operationsAlex Bradbury2017-10-191-0/+75
This adds the minimum necessary to support codegen for simple ALU operations on RV32. Prolog and epilog insertion, support for memory operations etc etc follow in future patches. Leave guessInstructionProperties=1 until https://reviews.llvm.org/D37065 is reviewed and lands. Differential Revision: https://reviews.llvm.org/D29933 llvm-svn: 316188
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