GHC.Llvm.Syntax

The LLVM abstract syntax.

Documentation

type LlvmBlockId = Unique

Block labels

data LlvmBlock

A block of LLVM code.

Constructors

LlvmBlock

Fields

• blockLabel :: LlvmBlockId

  The code label for this block

• blockStmts :: [LlvmStatement]

  A list of LlvmStatement's representing the code for this block. This list must end with a control flow statement.

type LlvmBlocks = [LlvmBlock]

data LlvmModule

An LLVM Module. This is a top level container in LLVM.

Constructors

LlvmModule

Fields

• modComments :: [LMString]

  Comments to include at the start of the module.

• modAliases :: [LlvmAlias]

  LLVM Alias type definitions.

• modMeta :: [MetaDecl]

  LLVM meta data.

• modGlobals :: [LMGlobal]

  Global variables to include in the module.

• modFwdDecls :: LlvmFunctionDecls

  LLVM Functions used in this module but defined in other modules.

• modFuncs :: LlvmFunctions

  LLVM Functions defined in this module.

data LlvmFunction

An LLVM Function

Constructors

LlvmFunction

Fields

• funcDecl :: LlvmFunctionDecl

  The signature of this declared function.

• funcArgs :: [LMString]

  The functions arguments

• funcAttrs :: [LlvmFuncAttr]

  The function attributes.

• funcSect :: LMSection

  The section to put the function into,

• funcPrefix :: Maybe LlvmStatic

  Prefix data

• funcBody :: LlvmBlocks

  The body of the functions.

type LlvmFunctions = [LlvmFunction]

type SingleThreaded = Bool

data LlvmSyncOrdering

LLVM ordering types for synchronization purposes. (Introduced in LLVM 3.0). Please see the LLVM documentation for a better description.

Constructors

SyncUnord

Some partial order of operations exists.

SyncMonotonic

A single total order for operations at a single address exists.

SyncAcquire

Acquire synchronization operation.

SyncRelease

Release synchronization operation.

SyncAcqRel

Acquire + Release synchronization operation.

SyncSeqCst

Full sequential Consistency operation.

Instances

Show LlvmSyncOrdering

Defined in GHC.Llvm.Syntax

Methods

showsPrec :: Int -> LlvmSyncOrdering -> ShowS

show :: LlvmSyncOrdering -> String

showList :: [LlvmSyncOrdering] -> ShowS

Eq LlvmSyncOrdering

Defined in GHC.Llvm.Syntax

Methods

(==) :: LlvmSyncOrdering -> LlvmSyncOrdering -> Bool

(/=) :: LlvmSyncOrdering -> LlvmSyncOrdering -> Bool

data LlvmAtomicOp

LLVM atomic operations. Please see the atomicrmw instruction in the LLVM documentation for a complete description.

Constructors

LAO_Xchg

LAO_Add

LAO_Sub

LAO_And

LAO_Nand

LAO_Or

LAO_Xor

LAO_Max

LAO_Min

LAO_Umax

LAO_Umin

Instances

Show LlvmAtomicOp

Defined in GHC.Llvm.Syntax

Methods

showsPrec :: Int -> LlvmAtomicOp -> ShowS

show :: LlvmAtomicOp -> String

showList :: [LlvmAtomicOp] -> ShowS

Eq LlvmAtomicOp

Defined in GHC.Llvm.Syntax

Methods

(==) :: LlvmAtomicOp -> LlvmAtomicOp -> Bool

(/=) :: LlvmAtomicOp -> LlvmAtomicOp -> Bool

data LlvmStatement

Llvm Statements

Constructors

Assignment LlvmVar LlvmExpression

Assign an expression to a variable: * dest: Variable to assign to * source: Source expression

Fence Bool LlvmSyncOrdering

Memory fence operation

Branch LlvmVar

Always branch to the target label

BranchIf LlvmVar LlvmVar LlvmVar

Branch to label targetTrue if cond is true otherwise to label targetFalse * cond: condition that will be tested, must be of type i1 * targetTrue: label to branch to if cond is true * targetFalse: label to branch to if cond is false

Comment [LMString]

Comment Plain comment.

MkLabel LlvmBlockId

Set a label on this position. * name: Identifier of this label, unique for this module

Store LlvmVar LlvmVar LMAlign

Store variable value in pointer ptr. If value is of type t then ptr must be of type t*. * value: Variable/Constant to store. * ptr: Location to store the value in

Switch LlvmVar LlvmVar [(LlvmVar, LlvmVar)]

Multiway branch * scrutinee: Variable or constant which must be of integer type that is determines which arm is chosen. * def: The default label if there is no match in target. * target: A list of (value,label) where the value is an integer constant and label the corresponding label to jump to if the scrutinee matches the value.

Return (Maybe LlvmVar)

Return a result. * result: The variable or constant to return

Unreachable

An instruction for the optimizer that the code following is not reachable

Expr LlvmExpression

Raise an expression to a statement (if don't want result or want to use Llvm unnamed values.

Nop

A nop LLVM statement. Useful as its often more efficient to use this then to wrap LLvmStatement in a Just or [].

MetaStmt [MetaAnnot] LlvmStatement

A LLVM statement with metadata attached to it.

Instances

Eq LlvmStatement

Defined in GHC.Llvm.Syntax

Methods

(==) :: LlvmStatement -> LlvmStatement -> Bool

(/=) :: LlvmStatement -> LlvmStatement -> Bool

data LlvmExpression

Llvm Expressions

Constructors

Alloca LlvmType Int

Allocate amount * sizeof(tp) bytes on the stack * tp: LlvmType to reserve room for * amount: The nr of tp's which must be allocated

LlvmOp LlvmMachOp LlvmVar LlvmVar

Perform the machine operator op on the operands left and right * op: operator * left: left operand * right: right operand

Compare LlvmCmpOp LlvmVar LlvmVar

Perform a compare operation on the operands left and right * op: operator * left: left operand * right: right operand

Extract LlvmVar LlvmVar

Extract a scalar element from a vector * val: The vector * idx: The index of the scalar within the vector

ExtractV LlvmVar Int

Extract a scalar element from a structure * val: The structure * idx: The index of the scalar within the structure Corresponds to "extractvalue" instruction.

Insert LlvmVar LlvmVar LlvmVar

Insert a scalar element into a vector * val: The source vector * elt: The scalar to insert * index: The index at which to insert the scalar

Malloc LlvmType Int

Allocate amount * sizeof(tp) bytes on the heap * tp: LlvmType to reserve room for * amount: The nr of tp's which must be allocated

Load LlvmVar LMAlign

Load the value at location ptr

ALoad LlvmSyncOrdering SingleThreaded LlvmVar

Atomic load of the value at location ptr

GetElemPtr Bool LlvmVar [LlvmVar]

Navigate in a structure, selecting elements * inbound: Is the pointer inbounds? (computed pointer doesn't overflow) * ptr: Location of the structure * indexes: A list of indexes to select the correct value.

Cast LlvmCastOp LlvmVar LlvmType

Cast the variable from to the to type. This is an abstraction of three cast operators in Llvm, inttoptr, ptrtoint and bitcast. * cast: Cast type * from: Variable to cast * to: type to cast to

AtomicRMW LlvmAtomicOp LlvmVar LlvmVar LlvmSyncOrdering

Atomic read-modify-write operation * op: Atomic operation * addr: Address to modify * operand: Operand to operation * ordering: Ordering requirement

CmpXChg LlvmVar LlvmVar LlvmVar LlvmSyncOrdering LlvmSyncOrdering

Compare-and-exchange operation * addr: Address to modify * old: Expected value * new: New value * suc_ord: Ordering required in success case * fail_ord: Ordering required in failure case, can be no stronger than suc_ord

Result is an i1, true if store was successful.

Call LlvmCallType LlvmVar [LlvmVar] [LlvmFuncAttr]

Call a function. The result is the value of the expression. * tailJumps: CallType to signal if the function should be tail called * fnptrval: An LLVM value containing a pointer to a function to be invoked. Can be indirect. Should be LMFunction type. * args: Concrete arguments for the parameters * attrs: A list of function attributes for the call. Only NoReturn, NoUnwind, ReadOnly and ReadNone are valid here.

CallM LlvmCallType LlvmVar [MetaExpr] [LlvmFuncAttr]

Call a function as above but potentially taking metadata as arguments. * tailJumps: CallType to signal if the function should be tail called * fnptrval: An LLVM value containing a pointer to a function to be invoked. Can be indirect. Should be LMFunction type. * args: Arguments that may include metadata. * attrs: A list of function attributes for the call. Only NoReturn, NoUnwind, ReadOnly and ReadNone are valid here.

Phi LlvmType [(LlvmVar, LlvmVar)]

Merge variables from different basic blocks which are predecessors of this basic block in a new variable of type tp. * tp: type of the merged variable, must match the types of the predecessor variables. * predecessors: A list of variables and the basic block that they originate from.

Asm LMString LMString LlvmType [LlvmVar] Bool Bool

Inline assembly expression. Syntax is very similar to the style used by GCC. * assembly: Actual inline assembly code. * constraints: Operand constraints. * return ty: Return type of function. * vars: Any variables involved in the assembly code. * sideeffect: Does the expression have side effects not visible from the constraints list. * alignstack: Should the stack be conservatively aligned before this expression is executed.

MExpr [MetaAnnot] LlvmExpression

A LLVM expression with metadata attached to it.

Instances

Eq LlvmExpression

Defined in GHC.Llvm.Syntax

Methods

(==) :: LlvmExpression -> LlvmExpression -> Bool

(/=) :: LlvmExpression -> LlvmExpression -> Bool