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path: root/compiler/GHC/Driver/Config/StgToCmm.hs
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* Add fused multiply-add instructionssheaf2023-05-111-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds eight new primops that fuse a multiplication and an addition or subtraction: - `{fmadd,fmsub,fnmadd,fnmsub}{Float,Double}#` fmadd x y z is x * y + z, computed with a single rounding step. This patch implements code generation for these primops in the following backends: - X86, AArch64 and PowerPC NCG, - LLVM - C WASM uses the C implementation. The primops are unsupported in the JavaScript backend. The following constant folding rules are also provided: - compute a * b + c when a, b, c are all literals, - x * y + 0 ==> x * y, - ±1 * y + z ==> z ± y and x * ±1 + z ==> z ± x. NB: the constant folding rules incorrectly handle signed zero. This is a known limitation with GHC's floating-point constant folding rules (#21227), which we hope to resolve in the future.
* Add Javascript backendSylvain Henry2022-11-291-2/+3
| | | | | | | | | | | | | | | Add JS backend adapted from the GHCJS project by Luite Stegeman. Some features haven't been ported or implemented yet. Tests for these features have been disabled with an associated gitlab ticket. Bump array submodule Work funded by IOG. Co-authored-by: Jeffrey Young <jeffrey.young@iohk.io> Co-authored-by: Luite Stegeman <stegeman@gmail.com> Co-authored-by: Josh Meredith <joshmeredith2008@gmail.com>
* compiler: allow big arith for wasm32Cheng Shao2022-11-111-1/+1
| | | | | This patch enables Cmm big arithmetic on wasm32, since 64-bit arithmetic can be efficiently lowered to wasm32 opcodes.
* Export pprTrace and friends from GHC.Prelude.Andreas Klebinger2022-11-031-3/+2
| | | | | Introduces GHC.Prelude.Basic which can be used in modules which are a dependency of the ppr code.
* Make debug a `Bool` not an `Int` in `StgToCmmConfig`John Ericson2022-05-231-1/+1
| | | | | | | We don't need any more resolution than this. Rename the field to `stgToCmmEmitDebugInfo` to indicate it is no longer conveying any "level" information.
* Change `Backend` type and remove direct dependencieswip/backend-as-recordNorman Ramsey2022-05-211-5/+8
| | | | | | | | | | | | | | | | | | | With this change, `Backend` becomes an abstract type (there are no more exposed value constructors). Decisions that were formerly made by asking "is the current back end equal to (or different from) this named value constructor?" are now made by interrogating the back end about its properties, which are functions exported by `GHC.Driver.Backend`. There is a description of how to migrate code using `Backend` in the user guide. Clients using the GHC API can find a backdoor to access the Backend datatype in GHC.Driver.Backend.Internal. Bumps haddock submodule. Fixes #20927
* Make floating-point abs IEEE 754 compliantARATA Mizuki2022-05-111-2/+0
| | | | | | The old code used by via-C backend didn't handle the sign bit of NaN. See #21043.
* StgToCmm.cgTopBinding: no isNCG, use binBlobThreshdoyougnu2022-03-021-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | This is a one line change. It is a fixup from MR!7325, was pointed out in review of MR!7442, specifically: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7442#note_406581 The change removes isNCG check from cgTopBinding. Instead it changes the type of binBlobThresh in DynFlags from Word to Maybe Word, where a Just 0 or a Nothing indicates an infinite threshold and thus the disable CmmFileEmbed case in the original check. This improves the cohesion of the module because more NCG related Backend stuff is moved into, and checked in, StgToCmm.Config. Note, that the meaning of a Just 0 or a Nothing in binBlobThresh is indicated in a comment next to its field in GHC.StgToCmm.Config. DynFlags: binBlobThresh: Word -> Maybe Word StgToCmm.Config: binBlobThesh add not ncg check DynFlags.binBlob: move Just 0 check to dflags init StgToCmm.binBlob: only check isNCG, Just 0 check to dflags StgToCmm.Config: strictify binBlobThresh
* Ticky profiling improvements.Matthew Pickering2022-03-021-0/+1
| | | | | | | | | | | | | | | | | | | | This adds a number of changes to ticky-ticky profiling. When an executable is profiled with IPE profiling it's now possible to associate id-related ticky counters to their source location. This works by emitting the info table address as part of the counter which can be looked up in the IPE table. Add a `-ticky-ap-thunk` flag. This flag prevents the use of some standard thunks which are precompiled into the RTS. This means reduced cache locality and increased code size. But it allows better attribution of execution cost to specific source locations instead of simple attributing it to the standard thunk. ticky-ticky now uses the `arg` field to emit additional information about counters in json format. When ticky-ticky is used in combination with the eventlog eventlog2html can be used to generate a html table from the eventlog similar to the old text output for ticky-ticky.
* Ticky: Gate tag-inference dummy ticky-counters behind a flag.Andreas Klebinger2022-02-251-0/+1
| | | | | | | | | | Tag inference included a way to collect stats about avoided tag-checks. This was dony by emitting "dummy" ticky entries with counts corresponding to predicted/unpredicated tag checks. This behaviour for ticky is now gated behind -fticky-tag-checks. I also documented ticky-LNE in the process.
* Tag inference work.Andreas Klebinger2022-02-121-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This does three major things: * Enforce the invariant that all strict fields must contain tagged pointers. * Try to predict the tag on bindings in order to omit tag checks. * Allows functions to pass arguments unlifted (call-by-value). The former is "simply" achieved by wrapping any constructor allocations with a case which will evaluate the respective strict bindings. The prediction is done by a new data flow analysis based on the STG representation of a program. This also helps us to avoid generating redudant cases for the above invariant. StrictWorkers are created by W/W directly and SpecConstr indirectly. See the Note [Strict Worker Ids] Other minor changes: * Add StgUtil module containing a few functions needed by, but not specific to the tag analysis. ------------------------- Metric Decrease: T12545 T18698b T18140 T18923 LargeRecord Metric Increase: LargeRecord ManyAlternatives ManyConstructors T10421 T12425 T12707 T13035 T13056 T13253 T13253-spj T13379 T15164 T18282 T18304 T18698a T1969 T20049 T3294 T4801 T5321FD T5321Fun T783 T9233 T9675 T9961 T19695 WWRec -------------------------
* StgToCmm: decouple DynFlags, add StgToCmmConfigdoyougnu2022-01-311-0/+74
StgToCmm: add Config, remove CgInfoDownwards StgToCmm: runC api change to take StgToCmmConfig StgToCmm: CgInfoDownad -> StgToCmmConfig StgToCmm.Monad: update getters/setters/withers StgToCmm: remove CallOpts in StgToCmm.Closure StgToCmm: remove dynflag references StgToCmm: PtrOpts removed StgToCmm: add TMap to config, Prof - dynflags StgToCmm: add omit yields to config StgToCmm.ExtCode: remove redundant import StgToCmm.Heap: remove references to dynflags StgToCmm: codeGen api change, DynFlags -> Config StgToCmm: remove dynflags in Env and StgToCmm StgToCmm.DataCon: remove dynflags references StgToCmm: remove dynflag references in DataCon StgToCmm: add backend avx flags to config StgToCmm.Prim: remove dynflag references StgToCmm.Expr: remove dynflag references StgToCmm.Bind: remove references to dynflags StgToCmm: move DoAlignSanitisation to Cmm.Type StgToCmm: remove PtrOpts in Cmm.Parser.y DynFlags: update ipInitCode api StgToCmm: Config Module is single source of truth StgToCmm: Lazy config breaks IORef deadlock testsuite: bump countdeps threshold StgToCmm.Config: strictify fields except UpdFrame Strictifying UpdFrameOffset causes the RTS build with stage1 to deadlock. Additionally, before the deadlock performance of the RTS is noticeably slower. StgToCmm.Config: add field descriptions StgToCmm: revert strictify on Module in config testsuite: update CountDeps tests StgToCmm: update comment, fix exports Specifically update comment about loopification passed into dynflags then stored into stgToCmmConfig. And remove getDynFlags from Monad.hs exports Types.Name: add pprFullName function StgToCmm.Ticky: use pprFullname, fixup ExtCode imports Cmm.Info: revert cmmGetClosureType removal StgToCmm.Bind: use pprFullName, Config update comments StgToCmm: update closureDescription api StgToCmm: SAT altHeapCheck StgToCmm: default render for Info table, ticky Use default rendering contexts for info table and ticky ticky, which should be independent of command line input. testsuite: bump count deps pprFullName: flag for ticky vs normal style output convertInfoProvMap: remove unused parameter StgToCmm.Config: add backend flags to config StgToCmm.Config: remove Backend from Config StgToCmm.Prim: refactor Backend call sites StgToCmm.Prim: remove redundant imports StgToCmm.Config: refactor vec compatibility check StgToCmm.Config: add allowQuotRem2 flag StgToCmm.Ticky: print internal names with parens StgToCmm.Bind: dispatch ppr based on externality StgToCmm: Add pprTickyname, Fix ticky naming Accidently removed the ctx for ticky SDoc output. The only relevant flag is sdocPprDebug which was accidental set to False due to using defaultSDocContext without altering the flag. StgToCmm: remove stateful fields in config fixup: config: remove redundant imports StgToCmm: move Sequel type to its own module StgToCmm: proliferate getCallMethod updated api StgToCmm.Monad: add FCodeState to Monad Api StgToCmm: add second reader monad to FCode fixup: Prim.hs: missed a merge conflict fixup: Match countDeps tests to HEAD StgToCmm.Monad: withState -> withCgState To disambiguate it from mtl withState. This withState shouldn't be returning the new state as a value. However, fixing this means tackling the knot tying in CgState and so is very difficult since it changes when the thunk of the knot is forced which either leads to deadlock or to compiler panic.
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