ghc-7.8.20140130: The GHC API

Safe HaskellNone
LanguageHaskell98

LlvmCodeGen.Base

Description

Base LLVM Code Generation module

Contains functions useful through out the code generator.

Synopsis

Documentation

type LiveGlobalRegs = [GlobalReg]Source

Global registers live on proc entry

type LlvmUnresData = (CLabel, Section, LlvmType, [UnresStatic])Source

Unresolved code. Of the form: (data label, data type, unresolved data)

type LlvmData = ([LMGlobal], [LlvmType])Source

Top level LLVM Data (globals and type aliases)

type UnresLabel = CmmLitSource

An unresolved Label.

Labels are unresolved when we haven't yet determined if they are defined in the module we are currently compiling, or an external one.

type LlvmVersion = IntSource

LLVM Version Number

defaultLlvmVersion :: LlvmVersionSource

The LLVM Version we assume if we don't know

data LlvmM aSource

The Llvm monad. Wraps LlvmEnv state as well as the IO monad

runLlvm :: DynFlags -> LlvmVersion -> BufHandle -> UniqSupply -> LlvmM () -> IO ()Source

Get initial Llvm environment.

liftStream :: Stream IO a x -> Stream LlvmM a xSource

Lift a stream into the LlvmM monad

withClearVars :: LlvmM a -> LlvmM aSource

Clear variables from the environment for a subcomputation

varLookup :: Uniquable key => key -> LlvmM (Maybe LlvmType)Source

Lookup variables or functions in the environment.

varInsert :: Uniquable key => key -> LlvmType -> LlvmM ()Source

Insert variables or functions into the environment.

markStackReg :: GlobalReg -> LlvmM ()Source

Set a register as allocated on the stack

checkStackReg :: GlobalReg -> LlvmM BoolSource

Check whether a register is allocated on the stack

funLookup :: Uniquable key => key -> LlvmM (Maybe LlvmType)Source

Lookup variables or functions in the environment.

funInsert :: Uniquable key => key -> LlvmType -> LlvmM ()Source

Insert variables or functions into the environment.

getLlvmVer :: LlvmM LlvmVersionSource

Get the LLVM version we are generating code for

getDynFlag :: (DynFlags -> a) -> LlvmM aSource

Get the platform we are generating code for

getLlvmPlatform :: LlvmM PlatformSource

Get the platform we are generating code for

dumpIfSetLlvm :: DumpFlag -> String -> SDoc -> LlvmM ()Source

Dumps the document if the corresponding flag has been set by the user

renderLlvm :: SDoc -> LlvmM ()Source

Prints the given contents to the output handle

runUs :: UniqSM a -> LlvmM aSource

Run a UniqSM action with our unique supply

markUsedVar :: LlvmVar -> LlvmM ()Source

Marks a variable as "used"

getUsedVars :: LlvmM [LlvmVar]Source

Return all variables marked as "used" so far

ghcInternalFunctions :: LlvmM ()Source

Here we pre-initialise some functions that are used internally by GHC so as to make sure they have the most general type in the case that user code also uses these functions but with a different type than GHC internally. (Main offender is treating return type as void instead of 'void *'). Fixes trac #5486.

getMetaUniqueId :: LlvmM IntSource

Allocate a new global unnamed metadata identifier

setUniqMeta :: Unique -> Int -> LlvmM ()Source

Sets metadata node for a given unique

getUniqMeta :: Unique -> LlvmM (Maybe Int)Source

Gets metadata node for given unique

freshSectionId :: LlvmM IntSource

Returns a fresh section ID

cmmToLlvmType :: CmmType -> LlvmTypeSource

Translate a basic CmmType to an LlvmType.

widthToLlvmFloat :: Width -> LlvmTypeSource

Translate a Cmm Float Width to a LlvmType.

widthToLlvmInt :: Width -> LlvmTypeSource

Translate a Cmm Bit Width to a LlvmType.

llvmFunTy :: LiveGlobalRegs -> LlvmM LlvmTypeSource

Llvm Function type for Cmm function

llvmStdFunAttrs :: [LlvmFuncAttr]Source

Llvm standard fun attributes

llvmFunAlign :: DynFlags -> LMAlignSource

Alignment to use for functions

llvmInfAlign :: DynFlags -> LMAlignSource

Alignment to use for into tables

llvmPtrBits :: DynFlags -> IntSource

Pointer width

mkLlvmFunc :: LiveGlobalRegs -> CLabel -> LlvmLinkageType -> LMSection -> LlvmBlocks -> LlvmM LlvmFunctionSource

Create a Haskell function in LLVM.

tysToParams :: [LlvmType] -> [LlvmParameter]Source

Convert a list of types to a list of function parameters (each with no parameter attributes)

getGlobalPtr :: LMString -> LlvmM LlvmVarSource

Create/get a pointer to a global value. Might return an alias if the value in question hasn't been defined yet. We especially make no guarantees on the type of the returned pointer.

generateAliases :: LlvmM ([LMGlobal], [LlvmType])Source

Generate definitions for aliases forward-referenced by getGlobalPtr.

Must be called at a point where we are sure that no new global definitions will be generated anymore!