1. 10 Feb, 2015 1 commit
    • Ben Gamari's avatar
      llvmGen: move to LLVM 3.6 exclusively · 5d5abdca
      Ben Gamari authored
      Summary:
      Rework llvmGen to use LLVM 3.6 exclusively. The plans for the 7.12 release are to ship LLVM alongside GHC in the interests of user (and developer) sanity.
      
      Along the way, refactor TNTC support to take advantage of the new `prefix` data support in LLVM 3.6. This allows us to drop the section-reordering component of the LLVM mangler.
      
      Test Plan: Validate, look at emitted code
      
      Reviewers: dterei, austin, scpmw
      
      Reviewed By: austin
      
      Subscribers: erikd, awson, spacekitteh, thomie, carter
      
      Differential Revision: https://phabricator.haskell.org/D530
      
      GHC Trac Issues: #10074
      5d5abdca
  2. 28 Dec, 2014 1 commit
    • Erik de Castro Lopo's avatar
      LlvmCodeGen cross-compiling fixes (#9895) · 58ac9c8f
      Erik de Castro Lopo authored
      Summary:
      * Throw an error when cross-compiling without a target definition.
        When cross compiling via LLVM, a target 'datalayout' and 'triple' must
        be defined or LLVM will generate code for the compile host instead of
        the compile target.
      
      * Add aarch64-unknown-linux-gnu target.
        The datalayout and triple lines were found by using clang to compile a
        small C program and -emit-llvm to get the LLVM IR output.
      Signed-off-by: Erik de Castro Lopo's avatarErik de Castro Lopo <erikd@mega-nerd.com>
      
      Test Plan: validate
      
      Reviewers: rwbarton, carter, hvr, bgamari, austin
      
      Reviewed By: austin
      
      Subscribers: carter, thomie, garious
      
      Differential Revision: https://phabricator.haskell.org/D585
      
      GHC Trac Issues: #9895
      58ac9c8f
  3. 21 Nov, 2014 1 commit
    • Ben Gamari's avatar
      llvmGen: Compatibility with LLVM 3.5 (re #9142) · e16a342d
      Ben Gamari authored
      Due to changes in LLVM 3.5 aliases now may only refer to definitions.
      Previously to handle symbols defined outside of the current commpilation
      unit GHC would emit both an `external` declaration, as well as an alias
      pointing to it, e.g.,
      
          @stg_BCO_info = external global i8
          @stg_BCO_info$alias = alias private i8* @stg_BCO_info
      
      Where references to `stg_BCO_info` will use the alias
      `stg_BCO_info$alias`. This is not permitted under the new alias
      behavior, resulting in errors resembling,
      
          Alias must point to a definition
          i8* @"stg_BCO_info$alias"
      
      To fix this, we invert the naming relationship between aliases and
      definitions. That is, now the symbol definition takes the name
      `@stg_BCO_info$def` and references use the actual name, `@stg_BCO_info`.
      This means the external symbols can be handled by simply emitting an
      `external` declaration,
      
          @stg_BCO_info = external global i8
      
      Whereas in the case of a forward declaration we emit,
      
          @stg_BCO_info = alias private i8* @stg_BCO_info$def
      
      Reviewed By: austin
      
      Differential Revision: https://phabricator.haskell.org/D155
      e16a342d
  4. 19 Nov, 2014 2 commits
  5. 15 May, 2014 1 commit
    • Herbert Valerio Riedel's avatar
      Add LANGUAGE pragmas to compiler/ source files · 23892440
      Herbert Valerio Riedel authored
      In some cases, the layout of the LANGUAGE/OPTIONS_GHC lines has been
      reorganized, while following the convention, to
      
      - place `{-# LANGUAGE #-}` pragmas at the top of the source file, before
        any `{-# OPTIONS_GHC #-}`-lines.
      
      - Moreover, if the list of language extensions fit into a single
        `{-# LANGUAGE ... -#}`-line (shorter than 80 characters), keep it on one
        line. Otherwise split into `{-# LANGUAGE ... -#}`-lines for each
        individual language extension. In both cases, try to keep the
        enumeration alphabetically ordered.
        (The latter layout is preferable as it's more diff-friendly)
      
      While at it, this also replaces obsolete `{-# OPTIONS ... #-}` pragma
      occurences by `{-# OPTIONS_GHC ... #-}` pragmas.
      23892440
  6. 24 Aug, 2013 2 commits
  7. 27 Jun, 2013 2 commits
    • Peter Wortmann's avatar
      Major Llvm refactoring · a948fe83
      Peter Wortmann authored
      This combined patch reworks the LLVM backend in a number of ways:
      
      1. Most prominently, we introduce a LlvmM monad carrying the contents of
         the old LlvmEnv around. This patch completely removes LlvmEnv and
         refactors towards standard library monad combinators wherever possible.
      
      2. Support for streaming - we can now generate chunks of Llvm for Cmm as
         it comes in. This might improve our speed.
      
      3. To allow streaming, we need a more flexible way to handle forward
         references. The solution (getGlobalPtr) unifies LlvmCodeGen.Data
         and getHsFunc as well.
      
      4. Skip alloca-allocation for registers that are actually never written.
         LLVM will automatically eliminate these, but output is smaller and
         friendlier to human eyes this way.
      
      5. We use LlvmM to collect references for llvm.used. This allows places
         other than cmmProcLlvmGens to generate entries.
      a948fe83
    • Peter Wortmann's avatar
      Extend globals to aliases · 720a87c7
      Peter Wortmann authored
      Also give them a proper constructor - getGlobalVar and getGlobalValue
      map directly to the accessors.
      720a87c7
  8. 20 Jun, 2013 1 commit
  9. 02 Mar, 2013 1 commit
  10. 25 Jan, 2013 1 commit
  11. 12 Nov, 2012 1 commit
    • Simon Marlow's avatar
      Remove OldCmm, convert backends to consume new Cmm · d92bd17f
      Simon Marlow authored
      This removes the OldCmm data type and the CmmCvt pass that converts
      new Cmm to OldCmm.  The backends (NCGs, LLVM and C) have all been
      converted to consume new Cmm.
      
      The main difference between the two data types is that conditional
      branches in new Cmm have both true/false successors, whereas in OldCmm
      the false case was a fallthrough.  To generate slightly better code we
      occasionally need to invert a conditional to ensure that the
      branch-not-taken becomes a fallthrough; this was previously done in
      CmmCvt, and it is now done in CmmContFlowOpt.
      
      We could go further and use the Hoopl Block representation for native
      code, which would mean that we could use Hoopl's postorderDfs and
      analyses for native code, but for now I've left it as is, using the
      old ListGraph representation for native code.
      d92bd17f
  12. 30 Oct, 2012 2 commits
    • gmainlan@microsoft.com's avatar
      Generate correct LLVM for the new register allocation scheme. · dcf88e66
      gmainlan@microsoft.com authored
      We now have accurate global register liveness information attached to all Cmm
      procedures and jumps. With this patch, the LLVM back end uses this information
      to pass only the live floating point (F and D) registers on tail calls. This
      makes the LLVM back end compatible with the new register allocation strategy.
      
      Ideally the GHC LLVM calling convention would put all registers that are always
      live first in the parameter sequence. Unfortunately the specification is written
      so that on x86-64 SpLim (always live) is passed after the R registers. Therefore
      we must always pass *something* in the R registers, so we pass the LLVM value
      undef.
      dcf88e66
    • gmainlan@microsoft.com's avatar
      Attach global register liveness info to Cmm procedures. · 5ee08ddf
      gmainlan@microsoft.com authored
      All Cmm procedures now include the set of global registers that are live on
      procedure entry, i.e., the global registers used to pass arguments to the
      procedure. Only global registers that are use to pass arguments are included in
      this list.
      5ee08ddf
  13. 16 Sep, 2012 2 commits
  14. 28 Aug, 2012 1 commit
  15. 12 Jun, 2012 1 commit
  16. 12 Jan, 2012 2 commits
  17. 06 Dec, 2011 1 commit
    • dterei's avatar
      Fix trac # 5486 · fe60dd4a
      dterei authored
      LLVM has a problem when the user imports some FFI types
      like memcpy and memset in a manner that conflicts with
      the types that GHC uses internally.
      
      So now we pre-initialise the environment with the most
      general types for these functions.
      fe60dd4a
  18. 02 Oct, 2011 1 commit
  19. 25 Aug, 2011 1 commit
  20. 21 Aug, 2011 1 commit
    • kgardas's avatar
      enable ARM specific target data layout and triple again · 748883b4
      kgardas authored
      This patch is allowed by the 'on ARMv7 with VFPv3[D16] support pass
       appropriate -mattr value to LLVM llc' patch. The trick is that LLVM
      by default (probably!) does not enable VFP, but GHC requires it
      so LLVM's llc asserts on unavailable floating point register. i.e. GHC/LLVM
      backend compiles into LLVM code which is using floats, but llc thinks
      no float regs for this are available. Passing appropriate llc option
      which is implemented in patch mentioned above fixes this issue.
      748883b4
  21. 10 Aug, 2011 3 commits
  22. 06 Jul, 2011 1 commit
    • batterseapower's avatar
      Refactoring: explicitly mark whether we have an info table in RawCmm · 41ca0b8d
      batterseapower authored
      I introduced this to support explicitly recording the info table label
      in RawCmm for another patch I am working on, but it turned out to lead
      to significant simplification in those parts of the compiler that
      consume RawCmm.
      
      Now, instead of lots of tests for null [CmmStatic] we have a simple
      test of a Maybe, and have reduced the number of guys that need to know
      how to convert entry->info labels by a TON. There are only 3 callers
      of that function now!
      41ca0b8d
  23. 05 Jul, 2011 1 commit
    • batterseapower's avatar
      Refactoring: use a structured CmmStatics type rather than [CmmStatic] · 54843b5b
      batterseapower authored
      I observed that the [CmmStatics] within CmmData uses the list in a very stylised way.
      The first item in the list is almost invariably a CmmDataLabel. Many parts of the
      compiler pattern match on this list and fail if this is not true.
      
      This patch makes the invariant explicit by introducing a structured type CmmStatics
      that holds the label and the list of remaining [CmmStatic].
      
      There is one wrinkle: the x86 backend sometimes wants to output an alignment directive just
      before the label. However, this can be easily fixed up by parameterising the native codegen
      over the type of CmmStatics (though the GenCmmTop parameterisation) and using a pair
      (Alignment, CmmStatics) there instead.
      
      As a result, I think we will be able to remove CmmAlign and CmmDataLabel from the CmmStatic
      data type, thus nuking a lot of code and failing pattern matches. This change will come as part
      of my next patch.
      54843b5b
  24. 04 May, 2011 1 commit
    • dterei's avatar
      LLVM: Support LLVM 2.9 (#5103) · 50e0db45
      dterei authored
      Instead of using the GNU As subsection feature on Linux/Windows
      for TNTC we now use the LLVM Mangler on all platforms.
      50e0db45
  25. 24 Jan, 2011 1 commit
    • Simon Marlow's avatar
      Merge in new code generator branch. · 889c084e
      Simon Marlow authored
      This changes the new code generator to make use of the Hoopl package
      for dataflow analysis.  Hoopl is a new boot package, and is maintained
      in a separate upstream git repository (as usual, GHC has its own
      lagging darcs mirror in http://darcs.haskell.org/packages/hoopl).
      
      During this merge I squashed recent history into one patch.  I tried
      to rebase, but the history had some internal conflicts of its own
      which made rebase extremely confusing, so I gave up. The history I
      squashed was:
      
        - Update new codegen to work with latest Hoopl
        - Add some notes on new code gen to cmm-notes
        - Enable Hoopl lag package.
        - Add SPJ note to cmm-notes
        - Improve GC calls on new code generator.
      
      Work in this branch was done by:
         - Milan Straka <fox@ucw.cz>
         - John Dias <dias@cs.tufts.edu>
         - David Terei <davidterei@gmail.com>
      
      Edward Z. Yang <ezyang@mit.edu> merged in further changes from GHC HEAD
      and fixed a few bugs.
      889c084e
  26. 18 Jul, 2010 1 commit
  27. 14 Jul, 2010 1 commit
  28. 13 Jul, 2010 1 commit
  29. 07 Jul, 2010 1 commit
  30. 24 Jun, 2010 1 commit
  31. 22 Jun, 2010 2 commits