1 --------------------------------------------------------------------------------
2 -- | The LLVM Type System.
5 module Llvm.Types where
7 #include "HsVersions.h"
20 -- -----------------------------------------------------------------------------
21 -- * LLVM Basic Types and Variables
24 -- | A global mutable variable. Maybe defined or external
25 type LMGlobal = (LlvmVar, Maybe LlvmStatic)
27 type LMString = FastString
32 = LMInt Int -- ^ An integer with a given width in bits.
33 | LMFloat -- ^ 32 bit floating point
34 | LMDouble -- ^ 64 bit floating point
35 | LMFloat80 -- ^ 80 bit (x86 only) floating point
36 | LMFloat128 -- ^ 128 bit floating point
37 | LMPointer LlvmType -- ^ A pointer to a 'LlvmType'
38 | LMArray Int LlvmType -- ^ An array of 'LlvmType'
39 | LMLabel -- ^ A 'LlvmVar' can represent a label (address)
40 | LMVoid -- ^ Void type
41 | LMStruct [LlvmType] -- ^ Structure type
42 | LMAlias LMString LlvmType -- ^ A type alias
44 -- | Function type, used to create pointers to functions
45 | LMFunction LlvmFunctionDecl
48 instance Show LlvmType where
49 show (LMInt size ) = "i" ++ show size
50 show (LMFloat ) = "float"
51 show (LMDouble ) = "double"
52 show (LMFloat80 ) = "x86_fp80"
53 show (LMFloat128 ) = "fp128"
54 show (LMPointer x ) = show x ++ "*"
55 show (LMArray nr tp ) = "[" ++ show nr ++ " x " ++ show tp ++ "]"
56 show (LMLabel ) = "label"
57 show (LMVoid ) = "void"
58 show (LMStruct tys ) = "{" ++ (commaCat tys) ++ "}"
60 show (LMFunction (LlvmFunctionDecl _ _ _ r varg p _))
61 = let args = ((drop 1).concat) $ -- use drop since it can handle empty lists
62 map (\(t,a) -> "," ++ show t ++ " " ++ spaceCat a) p
64 VarArgs | not (null args) -> ", ..."
67 in show r ++ " (" ++ args ++ varg' ++ ")"
69 show (LMAlias s _ ) = "%" ++ unpackFS s
71 -- | An LLVM section defenition. If Nothing then let LLVM decide the section
72 type LMSection = Maybe LMString
73 type LMAlign = Maybe Int
74 type LMConst = Bool -- ^ is a variable constant or not
78 -- | Variables with a global scope.
79 = LMGlobalVar LMString LlvmType LlvmLinkageType LMSection LMAlign LMConst
80 -- | Variables local to a function or parameters.
81 | LMLocalVar Unique LlvmType
82 -- | Named local variables. Sometimes we need to be able to explicitly name
83 -- variables (e.g for function arguments).
84 | LMNLocalVar LMString LlvmType
85 -- | A constant variable
89 instance Show LlvmVar where
90 show (LMLitVar x) = show x
91 show (x ) = show (getVarType x) ++ " " ++ getName x
94 -- | Llvm Literal Data.
96 -- These can be used inline in expressions.
98 -- | Refers to an integer constant (i64 42).
99 = LMIntLit Integer LlvmType
100 -- | Floating point literal
101 | LMFloatLit Double LlvmType
104 instance Show LlvmLit where
105 show l = show (getLitType l) ++ " " ++ getLit l
108 -- | Llvm Static Data.
110 -- These represent the possible global level variables and constants.
112 = LMComment LMString -- ^ A comment in a static section
113 | LMStaticLit LlvmLit -- ^ A static variant of a literal value
114 | LMUninitType LlvmType -- ^ For uninitialised data
115 | LMStaticStr LMString LlvmType -- ^ Defines a static 'LMString'
116 | LMStaticArray [LlvmStatic] LlvmType -- ^ A static array
117 | LMStaticStruc [LlvmStatic] LlvmType -- ^ A static structure type
118 | LMStaticPointer LlvmVar -- ^ A pointer to other data
120 -- static expressions, could split out but leave
121 -- for moment for ease of use. Not many of them.
123 | LMBitc LlvmStatic LlvmType -- ^ Pointer to Pointer conversion
124 | LMPtoI LlvmStatic LlvmType -- ^ Pointer to Integer conversion
125 | LMAdd LlvmStatic LlvmStatic -- ^ Constant addition operation
126 | LMSub LlvmStatic LlvmStatic -- ^ Constant subtraction operation
128 instance Show LlvmStatic where
129 show (LMComment s) = "; " ++ unpackFS s
130 show (LMStaticLit l ) = show l
131 show (LMUninitType t) = show t ++ " undef"
132 show (LMStaticStr s t) = show t ++ " c\"" ++ unpackFS s ++ "\\00\""
134 show (LMStaticArray d t)
135 = let struc = case d of
137 ts -> "[" ++ show (head ts) ++
138 concat (map (\x -> "," ++ show x) (tail ts)) ++ "]"
139 in show t ++ " " ++ struc
141 show (LMStaticStruc d t)
142 = let struc = case d of
144 ts -> "{" ++ show (head ts) ++
145 concat (map (\x -> "," ++ show x) (tail ts)) ++ "}"
146 in show t ++ " " ++ struc
148 show (LMStaticPointer v) = show v
151 = show t ++ " bitcast (" ++ show v ++ " to " ++ show t ++ ")"
154 = show t ++ " ptrtoint (" ++ show v ++ " to " ++ show t ++ ")"
157 = let ty1 = getStatType s1
158 op = if isFloat ty1 then " fadd (" else " add ("
159 in if ty1 == getStatType s2
160 then show ty1 ++ op ++ show s1 ++ "," ++ show s2 ++ ")"
161 else error $ "LMAdd with different types! s1: "
162 ++ show s1 ++ ", s2: " ++ show s2
164 = let ty1 = getStatType s1
165 op = if isFloat ty1 then " fsub (" else " sub ("
166 in if ty1 == getStatType s2
167 then show ty1 ++ op ++ show s1 ++ "," ++ show s2 ++ ")"
168 else error $ "LMSub with different types! s1: "
169 ++ show s1 ++ ", s2: " ++ show s2
172 -- | Concatenate an array together, separated by commas
173 commaCat :: Show a => [a] -> String
175 commaCat x = show (head x) ++ (concat $ map (\y -> "," ++ show y) (tail x))
177 -- | Concatenate an array together, separated by commas
178 spaceCat :: Show a => [a] -> String
180 spaceCat x = show (head x) ++ (concat $ map (\y -> " " ++ show y) (tail x))
182 -- -----------------------------------------------------------------------------
183 -- ** Operations on LLVM Basic Types and Variables
186 -- | Return the variable name or value of the 'LlvmVar'
187 -- in Llvm IR textual representation (e.g. @\@x@, @%y@ or @42@).
188 getName :: LlvmVar -> String
189 getName v@(LMGlobalVar _ _ _ _ _ _) = "@" ++ getPlainName v
190 getName v@(LMLocalVar _ _ ) = "%" ++ getPlainName v
191 getName v@(LMNLocalVar _ _ ) = "%" ++ getPlainName v
192 getName v@(LMLitVar _ ) = getPlainName v
194 -- | Return the variable name or value of the 'LlvmVar'
195 -- in a plain textual representation (e.g. @x@, @y@ or @42@).
196 getPlainName :: LlvmVar -> String
197 getPlainName (LMGlobalVar x _ _ _ _ _) = unpackFS x
198 getPlainName (LMLocalVar x _ ) = show x
199 getPlainName (LMNLocalVar x _ ) = unpackFS x
200 getPlainName (LMLitVar x ) = getLit x
202 -- | Print a literal value. No type.
203 getLit :: LlvmLit -> String
204 getLit (LMIntLit i _) = show ((fromInteger i)::Int)
205 getLit (LMFloatLit r LMFloat ) = fToStr $ realToFrac r
206 getLit (LMFloatLit r LMDouble) = dToStr r
207 getLit f@(LMFloatLit _ _) = error $ "Can't print this float literal!" ++ show f
209 -- | Return the 'LlvmType' of the 'LlvmVar'
210 getVarType :: LlvmVar -> LlvmType
211 getVarType (LMGlobalVar _ y _ _ _ _) = y
212 getVarType (LMLocalVar _ y ) = y
213 getVarType (LMNLocalVar _ y ) = y
214 getVarType (LMLitVar l ) = getLitType l
216 -- | Return the 'LlvmType' of a 'LlvmLit'
217 getLitType :: LlvmLit -> LlvmType
218 getLitType (LMIntLit _ t) = t
219 getLitType (LMFloatLit _ t) = t
221 -- | Return the 'LlvmType' of the 'LlvmStatic'
222 getStatType :: LlvmStatic -> LlvmType
223 getStatType (LMStaticLit l ) = getLitType l
224 getStatType (LMUninitType t) = t
225 getStatType (LMStaticStr _ t) = t
226 getStatType (LMStaticArray _ t) = t
227 getStatType (LMStaticStruc _ t) = t
228 getStatType (LMStaticPointer v) = getVarType v
229 getStatType (LMBitc _ t) = t
230 getStatType (LMPtoI _ t) = t
231 getStatType (LMAdd t _) = getStatType t
232 getStatType (LMSub t _) = getStatType t
233 getStatType (LMComment _) = error "Can't call getStatType on LMComment!"
235 -- | Return the 'LlvmType' of the 'LMGlobal'
236 getGlobalType :: LMGlobal -> LlvmType
237 getGlobalType (v, _) = getVarType v
239 -- | Return the 'LlvmVar' part of a 'LMGlobal'
240 getGlobalVar :: LMGlobal -> LlvmVar
241 getGlobalVar (v, _) = v
243 -- | Return the 'LlvmLinkageType' for a 'LlvmVar'
244 getLink :: LlvmVar -> LlvmLinkageType
245 getLink (LMGlobalVar _ _ l _ _ _) = l
248 -- | Add a pointer indirection to the supplied type. 'LMLabel' and 'LMVoid'
250 pLift :: LlvmType -> LlvmType
251 pLift (LMLabel) = error "Labels are unliftable"
252 pLift (LMVoid) = error "Voids are unliftable"
253 pLift x = LMPointer x
255 -- | Lower a variable of 'LMPointer' type.
256 pVarLift :: LlvmVar -> LlvmVar
257 pVarLift (LMGlobalVar s t l x a c) = LMGlobalVar s (pLift t) l x a c
258 pVarLift (LMLocalVar s t ) = LMLocalVar s (pLift t)
259 pVarLift (LMNLocalVar s t ) = LMNLocalVar s (pLift t)
260 pVarLift (LMLitVar _ ) = error $ "Can't lower a literal type!"
262 -- | Remove the pointer indirection of the supplied type. Only 'LMPointer'
263 -- constructors can be lowered.
264 pLower :: LlvmType -> LlvmType
265 pLower (LMPointer x) = x
266 pLower x = error $ show x ++ " is a unlowerable type, need a pointer"
268 -- | Lower a variable of 'LMPointer' type.
269 pVarLower :: LlvmVar -> LlvmVar
270 pVarLower (LMGlobalVar s t l x a c) = LMGlobalVar s (pLower t) l x a c
271 pVarLower (LMLocalVar s t ) = LMLocalVar s (pLower t)
272 pVarLower (LMNLocalVar s t ) = LMNLocalVar s (pLower t)
273 pVarLower (LMLitVar _ ) = error $ "Can't lower a literal type!"
275 -- | Test if the given 'LlvmType' is an integer
276 isInt :: LlvmType -> Bool
277 isInt (LMInt _) = True
280 -- | Test if the given 'LlvmType' is a floating point type
281 isFloat :: LlvmType -> Bool
282 isFloat LMFloat = True
283 isFloat LMDouble = True
284 isFloat LMFloat80 = True
285 isFloat LMFloat128 = True
288 -- | Test if the given 'LlvmType' is an 'LMPointer' construct
289 isPointer :: LlvmType -> Bool
290 isPointer (LMPointer _) = True
293 -- | Test if a 'LlvmVar' is global.
294 isGlobal :: LlvmVar -> Bool
295 isGlobal (LMGlobalVar _ _ _ _ _ _) = True
298 -- | Width in bits of an 'LlvmType', returns 0 if not applicable
299 llvmWidthInBits :: LlvmType -> Int
300 llvmWidthInBits (LMInt n) = n
301 llvmWidthInBits (LMFloat) = 32
302 llvmWidthInBits (LMDouble) = 64
303 llvmWidthInBits (LMFloat80) = 80
304 llvmWidthInBits (LMFloat128) = 128
305 -- Could return either a pointer width here or the width of what
306 -- it points to. We will go with the former for now.
307 llvmWidthInBits (LMPointer _) = llvmWidthInBits llvmWord
308 llvmWidthInBits (LMArray _ _) = llvmWidthInBits llvmWord
309 llvmWidthInBits LMLabel = 0
310 llvmWidthInBits LMVoid = 0
311 llvmWidthInBits (LMStruct tys) = sum $ map llvmWidthInBits tys
312 llvmWidthInBits (LMFunction _) = 0
313 llvmWidthInBits (LMAlias _ t) = llvmWidthInBits t
316 -- -----------------------------------------------------------------------------
317 -- ** Shortcut for Common Types
320 i128, i64, i32, i16, i8, i1, i8Ptr :: LlvmType
329 -- | The target architectures word size
330 llvmWord, llvmWordPtr :: LlvmType
331 llvmWord = LMInt (wORD_SIZE * 8)
332 llvmWordPtr = pLift llvmWord
334 -- -----------------------------------------------------------------------------
335 -- * LLVM Function Types
338 -- | An LLVM Function
339 data LlvmFunctionDecl = LlvmFunctionDecl {
340 -- | Unique identifier of the function
342 -- | LinkageType of the function
343 funcLinkage :: LlvmLinkageType,
344 -- | The calling convention of the function
345 funcCc :: LlvmCallConvention,
346 -- | Type of the returned value
347 decReturnType :: LlvmType,
348 -- | Indicates if this function uses varargs
349 decVarargs :: LlvmParameterListType,
350 -- | Parameter types and attributes
351 decParams :: [LlvmParameter],
352 -- | Function align value, must be power of 2
357 instance Show LlvmFunctionDecl where
358 show (LlvmFunctionDecl n l c r varg p a)
359 = let args = ((drop 1).concat) $ -- use drop since it can handle empty lists
360 map (\(t,a) -> "," ++ show t ++ " " ++ spaceCat a) p
362 VarArgs | not (null args) -> ", ..."
366 Just a' -> " align " ++ show a'
368 in show l ++ " " ++ show c ++ " " ++ show r ++ " @" ++ unpackFS n ++
369 "(" ++ args ++ varg' ++ ")" ++ align
371 type LlvmFunctionDecls = [LlvmFunctionDecl]
373 type LlvmParameter = (LlvmType, [LlvmParamAttr])
375 -- | LLVM Parameter Attributes.
377 -- Parameter attributes are used to communicate additional information about
378 -- the result or parameters of a function
380 -- | This indicates to the code generator that the parameter or return value
381 -- should be zero-extended to a 32-bit value by the caller (for a parameter)
382 -- or the callee (for a return value).
384 -- | This indicates to the code generator that the parameter or return value
385 -- should be sign-extended to a 32-bit value by the caller (for a parameter)
386 -- or the callee (for a return value).
388 -- | This indicates that this parameter or return value should be treated in
389 -- a special target-dependent fashion during while emitting code for a
390 -- function call or return (usually, by putting it in a register as opposed
393 -- | This indicates that the pointer parameter should really be passed by
394 -- value to the function.
396 -- | This indicates that the pointer parameter specifies the address of a
397 -- structure that is the return value of the function in the source program.
399 -- | This indicates that the pointer does not alias any global or any other
402 -- | This indicates that the callee does not make any copies of the pointer
403 -- that outlive the callee itself
405 -- | This indicates that the pointer parameter can be excised using the
406 -- trampoline intrinsics.
410 instance Show LlvmParamAttr where
411 show ZeroExt = "zeroext"
412 show SignExt = "signext"
416 show NoAlias = "noalias"
417 show NoCapture = "nocapture"
420 -- | Llvm Function Attributes.
422 -- Function attributes are set to communicate additional information about a
423 -- function. Function attributes are considered to be part of the function,
424 -- not of the function type, so functions with different parameter attributes
425 -- can have the same function type. Functions can have multiple attributes.
427 -- Descriptions taken from <http://llvm.org/docs/LangRef.html#fnattrs>
429 -- | This attribute indicates that the inliner should attempt to inline this
430 -- function into callers whenever possible, ignoring any active inlining
431 -- size threshold for this caller.
433 -- | This attribute indicates that the source code contained a hint that
434 -- inlining this function is desirable (such as the \"inline\" keyword in
435 -- C/C++). It is just a hint; it imposes no requirements on the inliner.
437 -- | This attribute indicates that the inliner should never inline this
438 -- function in any situation. This attribute may not be used together
439 -- with the alwaysinline attribute.
441 -- | This attribute suggests that optimization passes and code generator
442 -- passes make choices that keep the code size of this function low, and
443 -- otherwise do optimizations specifically to reduce code size.
445 -- | This function attribute indicates that the function never returns
446 -- normally. This produces undefined behavior at runtime if the function
447 -- ever does dynamically return.
449 -- | This function attribute indicates that the function never returns with
450 -- an unwind or exceptional control flow. If the function does unwind, its
451 -- runtime behavior is undefined.
453 -- | This attribute indicates that the function computes its result (or
454 -- decides to unwind an exception) based strictly on its arguments, without
455 -- dereferencing any pointer arguments or otherwise accessing any mutable
456 -- state (e.g. memory, control registers, etc) visible to caller functions.
457 -- It does not write through any pointer arguments (including byval
458 -- arguments) and never changes any state visible to callers. This means
459 -- that it cannot unwind exceptions by calling the C++ exception throwing
460 -- methods, but could use the unwind instruction.
462 -- | This attribute indicates that the function does not write through any
463 -- pointer arguments (including byval arguments) or otherwise modify any
464 -- state (e.g. memory, control registers, etc) visible to caller functions.
465 -- It may dereference pointer arguments and read state that may be set in
466 -- the caller. A readonly function always returns the same value (or unwinds
467 -- an exception identically) when called with the same set of arguments and
468 -- global state. It cannot unwind an exception by calling the C++ exception
469 -- throwing methods, but may use the unwind instruction.
471 -- | This attribute indicates that the function should emit a stack smashing
472 -- protector. It is in the form of a \"canary\"—a random value placed on the
473 -- stack before the local variables that's checked upon return from the
474 -- function to see if it has been overwritten. A heuristic is used to
475 -- determine if a function needs stack protectors or not.
477 -- If a function that has an ssp attribute is inlined into a function that
478 -- doesn't have an ssp attribute, then the resulting function will have an
481 -- | This attribute indicates that the function should always emit a stack
482 -- smashing protector. This overrides the ssp function attribute.
484 -- If a function that has an sspreq attribute is inlined into a function
485 -- that doesn't have an sspreq attribute or which has an ssp attribute,
486 -- then the resulting function will have an sspreq attribute.
488 -- | This attribute indicates that the code generator should not use a red
489 -- zone, even if the target-specific ABI normally permits it.
491 -- | This attributes disables implicit floating point instructions.
493 -- | This attribute disables prologue / epilogue emission for the function.
494 -- This can have very system-specific consequences.
498 instance Show LlvmFuncAttr where
499 show AlwaysInline = "alwaysinline"
500 show InlineHint = "inlinehint"
501 show NoInline = "noinline"
502 show OptSize = "optsize"
503 show NoReturn = "noreturn"
504 show NoUnwind = "nounwind"
505 show ReadNone = "readnon"
506 show ReadOnly = "readonly"
508 show SspReq = "ssqreq"
509 show NoRedZone = "noredzone"
510 show NoImplicitFloat = "noimplicitfloat"
514 -- | Different types to call a function.
516 -- | Normal call, allocate a new stack frame.
518 -- | Tail call, perform the call in the current stack frame.
522 -- | Different calling conventions a function can use.
523 data LlvmCallConvention
524 -- | The C calling convention.
525 -- This calling convention (the default if no other calling convention is
526 -- specified) matches the target C calling conventions. This calling
527 -- convention supports varargs function calls and tolerates some mismatch in
528 -- the declared prototype and implemented declaration of the function (as
531 -- | This calling convention attempts to make calls as fast as possible
532 -- (e.g. by passing things in registers). This calling convention allows
533 -- the target to use whatever tricks it wants to produce fast code for the
534 -- target, without having to conform to an externally specified ABI
535 -- (Application Binary Interface). Implementations of this convention should
536 -- allow arbitrary tail call optimization to be supported. This calling
537 -- convention does not support varargs and requires the prototype of al
538 -- callees to exactly match the prototype of the function definition.
540 -- | This calling convention attempts to make code in the caller as efficient
541 -- as possible under the assumption that the call is not commonly executed.
542 -- As such, these calls often preserve all registers so that the call does
543 -- not break any live ranges in the caller side. This calling convention
544 -- does not support varargs and requires the prototype of all callees to
545 -- exactly match the prototype of the function definition.
547 -- | Any calling convention may be specified by number, allowing
548 -- target-specific calling conventions to be used. Target specific calling
549 -- conventions start at 64.
551 -- | X86 Specific 'StdCall' convention. LLVM includes a specific alias for it
552 -- rather than just using CC_Ncc.
556 instance Show LlvmCallConvention where
558 show CC_Fastcc = "fastcc"
559 show CC_Coldcc = "coldcc"
560 show (CC_Ncc i) = "cc " ++ show i
561 show CC_X86_Stdcc = "x86_stdcallcc"
564 -- | Functions can have a fixed amount of parameters, or a variable amount.
565 data LlvmParameterListType
566 -- Fixed amount of arguments.
568 -- Variable amount of arguments.
573 -- | Linkage type of a symbol.
575 -- The description of the constructors is copied from the Llvm Assembly Language
576 -- Reference Manual <http://www.llvm.org/docs/LangRef.html#linkage>, because
577 -- they correspond to the Llvm linkage types.
579 -- | Global values with internal linkage are only directly accessible by
580 -- objects in the current module. In particular, linking code into a module
581 -- with an internal global value may cause the internal to be renamed as
582 -- necessary to avoid collisions. Because the symbol is internal to the
583 -- module, all references can be updated. This corresponds to the notion
584 -- of the @static@ keyword in C.
586 -- | Globals with @linkonce@ linkage are merged with other globals of the
587 -- same name when linkage occurs. This is typically used to implement
588 -- inline functions, templates, or other code which must be generated
589 -- in each translation unit that uses it. Unreferenced linkonce globals are
590 -- allowed to be discarded.
592 -- | @weak@ linkage is exactly the same as linkonce linkage, except that
593 -- unreferenced weak globals may not be discarded. This is used for globals
594 -- that may be emitted in multiple translation units, but that are not
595 -- guaranteed to be emitted into every translation unit that uses them. One
596 -- example of this are common globals in C, such as @int X;@ at global
599 -- | @appending@ linkage may only be applied to global variables of pointer
600 -- to array type. When two global variables with appending linkage are
601 -- linked together, the two global arrays are appended together. This is
602 -- the Llvm, typesafe, equivalent of having the system linker append
603 -- together @sections@ with identical names when .o files are linked.
605 -- | The semantics of this linkage follow the ELF model: the symbol is weak
606 -- until linked, if not linked, the symbol becomes null instead of being an
607 -- undefined reference.
609 -- | The symbol participates in linkage and can be used to resolve external
610 -- symbol references.
612 -- | Alias for 'ExternallyVisible' but with explicit textual form in LLVM
617 instance Show LlvmLinkageType where
618 show Internal = "internal"
619 show LinkOnce = "linkonce"
621 show Appending = "appending"
622 show ExternWeak = "extern_weak"
623 -- ExternallyVisible does not have a textual representation, it is
624 -- the linkage type a function resolves to if no other is specified
626 show ExternallyVisible = ""
627 show External = "external"
630 -- -----------------------------------------------------------------------------
634 -- | Llvm binary operators machine operations.
636 = LM_MO_Add -- ^ add two integer, floating point or vector values.
637 | LM_MO_Sub -- ^ subtract two ...
638 | LM_MO_Mul -- ^ multiply ..
639 | LM_MO_UDiv -- ^ unsigned integer or vector division.
640 | LM_MO_SDiv -- ^ signed integer ..
641 | LM_MO_URem -- ^ unsigned integer or vector remainder (mod)
642 | LM_MO_SRem -- ^ signed ...
644 | LM_MO_FAdd -- ^ add two floating point or vector values.
645 | LM_MO_FSub -- ^ subtract two ...
646 | LM_MO_FMul -- ^ multiply ...
647 | LM_MO_FDiv -- ^ divide ...
648 | LM_MO_FRem -- ^ remainder ...
652 -- | Logical shift right
653 -- Shift right, filling with zero
655 -- | Arithmetic shift right
656 -- The most significant bits of the result will be equal to the sign bit of
660 | LM_MO_And -- ^ AND bitwise logical operation.
661 | LM_MO_Or -- ^ OR bitwise logical operation.
662 | LM_MO_Xor -- ^ XOR bitwise logical operation.
665 instance Show LlvmMachOp where
666 show LM_MO_Add = "add"
667 show LM_MO_Sub = "sub"
668 show LM_MO_Mul = "mul"
669 show LM_MO_UDiv = "udiv"
670 show LM_MO_SDiv = "sdiv"
671 show LM_MO_URem = "urem"
672 show LM_MO_SRem = "srem"
673 show LM_MO_FAdd = "fadd"
674 show LM_MO_FSub = "fsub"
675 show LM_MO_FMul = "fmul"
676 show LM_MO_FDiv = "fdiv"
677 show LM_MO_FRem = "frem"
678 show LM_MO_Shl = "shl"
679 show LM_MO_LShr = "lshr"
680 show LM_MO_AShr = "ashr"
681 show LM_MO_And = "and"
683 show LM_MO_Xor = "xor"
686 -- | Llvm compare operations.
688 = LM_CMP_Eq -- ^ Equal (Signed and Unsigned)
689 | LM_CMP_Ne -- ^ Not equal (Signed and Unsigned)
690 | LM_CMP_Ugt -- ^ Unsigned greater than
691 | LM_CMP_Uge -- ^ Unsigned greater than or equal
692 | LM_CMP_Ult -- ^ Unsigned less than
693 | LM_CMP_Ule -- ^ Unsigned less than or equal
694 | LM_CMP_Sgt -- ^ Signed greater than
695 | LM_CMP_Sge -- ^ Signed greater than or equal
696 | LM_CMP_Slt -- ^ Signed less than
697 | LM_CMP_Sle -- ^ Signed less than or equal
699 -- Float comparisons. GHC uses a mix of ordered and unordered float
701 | LM_CMP_Feq -- ^ Float equal
702 | LM_CMP_Fne -- ^ Float not equal
703 | LM_CMP_Fgt -- ^ Float greater than
704 | LM_CMP_Fge -- ^ Float greater than or equal
705 | LM_CMP_Flt -- ^ Float less than
706 | LM_CMP_Fle -- ^ Float less than or equal
709 instance Show LlvmCmpOp where
710 show LM_CMP_Eq = "eq"
711 show LM_CMP_Ne = "ne"
712 show LM_CMP_Ugt = "ugt"
713 show LM_CMP_Uge = "uge"
714 show LM_CMP_Ult = "ult"
715 show LM_CMP_Ule = "ule"
716 show LM_CMP_Sgt = "sgt"
717 show LM_CMP_Sge = "sge"
718 show LM_CMP_Slt = "slt"
719 show LM_CMP_Sle = "sle"
720 show LM_CMP_Feq = "oeq"
721 show LM_CMP_Fne = "une"
722 show LM_CMP_Fgt = "ogt"
723 show LM_CMP_Fge = "oge"
724 show LM_CMP_Flt = "olt"
725 show LM_CMP_Fle = "ole"
728 -- | Llvm cast operations.
730 = LM_Trunc -- ^ Integer truncate
731 | LM_Zext -- ^ Integer extend (zero fill)
732 | LM_Sext -- ^ Integer extend (sign fill)
733 | LM_Fptrunc -- ^ Float truncate
734 | LM_Fpext -- ^ Float extend
735 | LM_Fptoui -- ^ Float to unsigned Integer
736 | LM_Fptosi -- ^ Float to signed Integer
737 | LM_Uitofp -- ^ Unsigned Integer to Float
738 | LM_Sitofp -- ^ Signed Int to Float
739 | LM_Ptrtoint -- ^ Pointer to Integer
740 | LM_Inttoptr -- ^ Integer to Pointer
741 | LM_Bitcast -- ^ Cast between types where no bit manipulation is needed
744 instance Show LlvmCastOp where
745 show LM_Trunc = "trunc"
746 show LM_Zext = "zext"
747 show LM_Sext = "sext"
748 show LM_Fptrunc = "fptrunc"
749 show LM_Fpext = "fpext"
750 show LM_Fptoui = "fptoui"
751 show LM_Fptosi = "fptosi"
752 show LM_Uitofp = "uitofp"
753 show LM_Sitofp = "sitofp"
754 show LM_Ptrtoint = "ptrtoint"
755 show LM_Inttoptr = "inttoptr"
756 show LM_Bitcast = "bitcast"
759 -- -----------------------------------------------------------------------------
760 -- * Floating point conversion
763 -- | Convert a Haskell Double to an LLVM hex encoded floating point form. In
764 -- Llvm float literals can be printed in a big-endian hexadecimal format,
765 -- regardless of underlying architecture.
766 dToStr :: Double -> String
768 = let bs = doubleToBytes d
769 hex d' = case showHex d' "" of
770 [] -> error "dToStr: too few hex digits for float"
773 _ -> error "dToStr: too many hex digits for float"
775 str = map toUpper $ concat . fixEndian . (map hex) $ bs
778 -- | Convert a Haskell Float to an LLVM hex encoded floating point form.
779 -- LLVM uses the same encoding for both floats and doubles (16 digit hex
780 -- string) but floats must have the last half all zeroes so it can fit into
781 -- a float size type.
782 {-# NOINLINE fToStr #-}
783 fToStr :: Float -> String
784 fToStr = (dToStr . realToFrac)
786 -- | Reverse or leave byte data alone to fix endianness on this target.
787 fixEndian :: [a] -> [a]
788 #ifdef WORDS_BIGENDIAN