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 in if ty1 == getStatType s2
159 then show ty1 ++ " add (" ++ show s1 ++ "," ++ show s2 ++ ")"
160 else error $ "LMAdd with different types! s1: "
161 ++ show s1 ++ ", s2: " ++ show s2
163 = let ty1 = getStatType s1
164 in if ty1 == getStatType s2
165 then show ty1 ++ " sub (" ++ show s1 ++ "," ++ show s2 ++ ")"
166 else error $ "LMSub with different types! s1: "
167 ++ show s1 ++ ", s2: " ++ show s2
170 -- | Concatenate an array together, separated by commas
171 commaCat :: Show a => [a] -> String
173 commaCat x = show (head x) ++ (concat $ map (\y -> "," ++ show y) (tail x))
175 -- | Concatenate an array together, separated by commas
176 spaceCat :: Show a => [a] -> String
178 spaceCat x = show (head x) ++ (concat $ map (\y -> " " ++ show y) (tail x))
180 -- -----------------------------------------------------------------------------
181 -- ** Operations on LLVM Basic Types and Variables
184 -- | Return the variable name or value of the 'LlvmVar'
185 -- in Llvm IR textual representation (e.g. @\@x@, @%y@ or @42@).
186 getName :: LlvmVar -> String
187 getName v@(LMGlobalVar _ _ _ _ _ _) = "@" ++ getPlainName v
188 getName v@(LMLocalVar _ _ ) = "%" ++ getPlainName v
189 getName v@(LMNLocalVar _ _ ) = "%" ++ getPlainName v
190 getName v@(LMLitVar _ ) = getPlainName v
192 -- | Return the variable name or value of the 'LlvmVar'
193 -- in a plain textual representation (e.g. @x@, @y@ or @42@).
194 getPlainName :: LlvmVar -> String
195 getPlainName (LMGlobalVar x _ _ _ _ _) = unpackFS x
196 getPlainName (LMLocalVar x _ ) = show x
197 getPlainName (LMNLocalVar x _ ) = unpackFS x
198 getPlainName (LMLitVar x ) = getLit x
200 -- | Print a literal value. No type.
201 getLit :: LlvmLit -> String
202 getLit (LMIntLit i _) = show ((fromInteger i)::Int)
203 getLit (LMFloatLit r LMFloat ) = fToStr $ realToFrac r
204 getLit (LMFloatLit r LMDouble) = dToStr r
205 getLit f@(LMFloatLit _ _) = error $ "Can't print this float literal!" ++ show f
207 -- | Return the 'LlvmType' of the 'LlvmVar'
208 getVarType :: LlvmVar -> LlvmType
209 getVarType (LMGlobalVar _ y _ _ _ _) = y
210 getVarType (LMLocalVar _ y ) = y
211 getVarType (LMNLocalVar _ y ) = y
212 getVarType (LMLitVar l ) = getLitType l
214 -- | Return the 'LlvmType' of a 'LlvmLit'
215 getLitType :: LlvmLit -> LlvmType
216 getLitType (LMIntLit _ t) = t
217 getLitType (LMFloatLit _ t) = t
219 -- | Return the 'LlvmType' of the 'LlvmStatic'
220 getStatType :: LlvmStatic -> LlvmType
221 getStatType (LMStaticLit l ) = getLitType l
222 getStatType (LMUninitType t) = t
223 getStatType (LMStaticStr _ t) = t
224 getStatType (LMStaticArray _ t) = t
225 getStatType (LMStaticStruc _ t) = t
226 getStatType (LMStaticPointer v) = getVarType v
227 getStatType (LMBitc _ t) = t
228 getStatType (LMPtoI _ t) = t
229 getStatType (LMAdd t _) = getStatType t
230 getStatType (LMSub t _) = getStatType t
231 getStatType (LMComment _) = error "Can't call getStatType on LMComment!"
233 -- | Return the 'LlvmType' of the 'LMGlobal'
234 getGlobalType :: LMGlobal -> LlvmType
235 getGlobalType (v, _) = getVarType v
237 -- | Return the 'LlvmVar' part of a 'LMGlobal'
238 getGlobalVar :: LMGlobal -> LlvmVar
239 getGlobalVar (v, _) = v
241 -- | Return the 'LlvmLinkageType' for a 'LlvmVar'
242 getLink :: LlvmVar -> LlvmLinkageType
243 getLink (LMGlobalVar _ _ l _ _ _) = l
246 -- | Add a pointer indirection to the supplied type. 'LMLabel' and 'LMVoid'
248 pLift :: LlvmType -> LlvmType
249 pLift (LMLabel) = error "Labels are unliftable"
250 pLift (LMVoid) = error "Voids are unliftable"
251 pLift x = LMPointer x
253 -- | Lower a variable of 'LMPointer' type.
254 pVarLift :: LlvmVar -> LlvmVar
255 pVarLift (LMGlobalVar s t l x a c) = LMGlobalVar s (pLift t) l x a c
256 pVarLift (LMLocalVar s t ) = LMLocalVar s (pLift t)
257 pVarLift (LMNLocalVar s t ) = LMNLocalVar s (pLift t)
258 pVarLift (LMLitVar _ ) = error $ "Can't lower a literal type!"
260 -- | Remove the pointer indirection of the supplied type. Only 'LMPointer'
261 -- constructors can be lowered.
262 pLower :: LlvmType -> LlvmType
263 pLower (LMPointer x) = x
264 pLower x = error $ show x ++ " is a unlowerable type, need a pointer"
266 -- | Lower a variable of 'LMPointer' type.
267 pVarLower :: LlvmVar -> LlvmVar
268 pVarLower (LMGlobalVar s t l x a c) = LMGlobalVar s (pLower t) l x a c
269 pVarLower (LMLocalVar s t ) = LMLocalVar s (pLower t)
270 pVarLower (LMNLocalVar s t ) = LMNLocalVar s (pLower t)
271 pVarLower (LMLitVar _ ) = error $ "Can't lower a literal type!"
273 -- | Test if the given 'LlvmType' is an integer
274 isInt :: LlvmType -> Bool
275 isInt (LMInt _) = True
278 -- | Test if the given 'LlvmType' is a floating point type
279 isFloat :: LlvmType -> Bool
280 isFloat LMFloat = True
281 isFloat LMDouble = True
282 isFloat LMFloat80 = True
283 isFloat LMFloat128 = True
286 -- | Test if the given 'LlvmType' is an 'LMPointer' construct
287 isPointer :: LlvmType -> Bool
288 isPointer (LMPointer _) = True
291 -- | Test if a 'LlvmVar' is global.
292 isGlobal :: LlvmVar -> Bool
293 isGlobal (LMGlobalVar _ _ _ _ _ _) = True
296 -- | Width in bits of an 'LlvmType', returns 0 if not applicable
297 llvmWidthInBits :: LlvmType -> Int
298 llvmWidthInBits (LMInt n) = n
299 llvmWidthInBits (LMFloat) = 32
300 llvmWidthInBits (LMDouble) = 64
301 llvmWidthInBits (LMFloat80) = 80
302 llvmWidthInBits (LMFloat128) = 128
303 -- Could return either a pointer width here or the width of what
304 -- it points to. We will go with the former for now.
305 llvmWidthInBits (LMPointer _) = llvmWidthInBits llvmWord
306 llvmWidthInBits (LMArray _ _) = llvmWidthInBits llvmWord
307 llvmWidthInBits LMLabel = 0
308 llvmWidthInBits LMVoid = 0
309 llvmWidthInBits (LMStruct tys) = sum $ map llvmWidthInBits tys
310 llvmWidthInBits (LMFunction _) = 0
311 llvmWidthInBits (LMAlias _ t) = llvmWidthInBits t
314 -- -----------------------------------------------------------------------------
315 -- ** Shortcut for Common Types
318 i128, i64, i32, i16, i8, i1, i8Ptr :: LlvmType
327 -- | The target architectures word size
328 llvmWord, llvmWordPtr :: LlvmType
329 llvmWord = LMInt (wORD_SIZE * 8)
330 llvmWordPtr = pLift llvmWord
332 -- -----------------------------------------------------------------------------
333 -- * LLVM Function Types
336 -- | An LLVM Function
337 data LlvmFunctionDecl = LlvmFunctionDecl {
338 -- | Unique identifier of the function
340 -- | LinkageType of the function
341 funcLinkage :: LlvmLinkageType,
342 -- | The calling convention of the function
343 funcCc :: LlvmCallConvention,
344 -- | Type of the returned value
345 decReturnType :: LlvmType,
346 -- | Indicates if this function uses varargs
347 decVarargs :: LlvmParameterListType,
348 -- | Parameter types and attributes
349 decParams :: [LlvmParameter],
350 -- | Function align value, must be power of 2
355 instance Show LlvmFunctionDecl where
356 show (LlvmFunctionDecl n l c r varg p a)
357 = let args = ((drop 1).concat) $ -- use drop since it can handle empty lists
358 map (\(t,a) -> "," ++ show t ++ " " ++ spaceCat a) p
360 VarArgs | not (null args) -> ", ..."
364 Just a' -> " align " ++ show a'
366 in show l ++ " " ++ show c ++ " " ++ show r ++ " @" ++ unpackFS n ++
367 "(" ++ args ++ varg' ++ ")" ++ align
369 type LlvmFunctionDecls = [LlvmFunctionDecl]
371 type LlvmParameter = (LlvmType, [LlvmParamAttr])
373 -- | LLVM Parameter Attributes.
375 -- Parameter attributes are used to communicate additional information about
376 -- the result or parameters of a function
378 -- | This indicates to the code generator that the parameter or return value
379 -- should be zero-extended to a 32-bit value by the caller (for a parameter)
380 -- or the callee (for a return value).
382 -- | This indicates to the code generator that the parameter or return value
383 -- should be sign-extended to a 32-bit value by the caller (for a parameter)
384 -- or the callee (for a return value).
386 -- | This indicates that this parameter or return value should be treated in
387 -- a special target-dependent fashion during while emitting code for a
388 -- function call or return (usually, by putting it in a register as opposed
391 -- | This indicates that the pointer parameter should really be passed by
392 -- value to the function.
394 -- | This indicates that the pointer parameter specifies the address of a
395 -- structure that is the return value of the function in the source program.
397 -- | This indicates that the pointer does not alias any global or any other
400 -- | This indicates that the callee does not make any copies of the pointer
401 -- that outlive the callee itself
403 -- | This indicates that the pointer parameter can be excised using the
404 -- trampoline intrinsics.
408 instance Show LlvmParamAttr where
409 show ZeroExt = "zeroext"
410 show SignExt = "signext"
414 show NoAlias = "noalias"
415 show NoCapture = "nocapture"
418 -- | Llvm Function Attributes.
420 -- Function attributes are set to communicate additional information about a
421 -- function. Function attributes are considered to be part of the function,
422 -- not of the function type, so functions with different parameter attributes
423 -- can have the same function type. Functions can have multiple attributes.
425 -- Descriptions taken from <http://llvm.org/docs/LangRef.html#fnattrs>
427 -- | This attribute indicates that the inliner should attempt to inline this
428 -- function into callers whenever possible, ignoring any active inlining
429 -- size threshold for this caller.
431 -- | This attribute indicates that the source code contained a hint that
432 -- inlining this function is desirable (such as the \"inline\" keyword in
433 -- C/C++). It is just a hint; it imposes no requirements on the inliner.
435 -- | This attribute indicates that the inliner should never inline this
436 -- function in any situation. This attribute may not be used together
437 -- with the alwaysinline attribute.
439 -- | This attribute suggests that optimization passes and code generator
440 -- passes make choices that keep the code size of this function low, and
441 -- otherwise do optimizations specifically to reduce code size.
443 -- | This function attribute indicates that the function never returns
444 -- normally. This produces undefined behavior at runtime if the function
445 -- ever does dynamically return.
447 -- | This function attribute indicates that the function never returns with
448 -- an unwind or exceptional control flow. If the function does unwind, its
449 -- runtime behavior is undefined.
451 -- | This attribute indicates that the function computes its result (or
452 -- decides to unwind an exception) based strictly on its arguments, without
453 -- dereferencing any pointer arguments or otherwise accessing any mutable
454 -- state (e.g. memory, control registers, etc) visible to caller functions.
455 -- It does not write through any pointer arguments (including byval
456 -- arguments) and never changes any state visible to callers. This means
457 -- that it cannot unwind exceptions by calling the C++ exception throwing
458 -- methods, but could use the unwind instruction.
460 -- | This attribute indicates that the function does not write through any
461 -- pointer arguments (including byval arguments) or otherwise modify any
462 -- state (e.g. memory, control registers, etc) visible to caller functions.
463 -- It may dereference pointer arguments and read state that may be set in
464 -- the caller. A readonly function always returns the same value (or unwinds
465 -- an exception identically) when called with the same set of arguments and
466 -- global state. It cannot unwind an exception by calling the C++ exception
467 -- throwing methods, but may use the unwind instruction.
469 -- | This attribute indicates that the function should emit a stack smashing
470 -- protector. It is in the form of a \"canary\"—a random value placed on the
471 -- stack before the local variables that's checked upon return from the
472 -- function to see if it has been overwritten. A heuristic is used to
473 -- determine if a function needs stack protectors or not.
475 -- If a function that has an ssp attribute is inlined into a function that
476 -- doesn't have an ssp attribute, then the resulting function will have an
479 -- | This attribute indicates that the function should always emit a stack
480 -- smashing protector. This overrides the ssp function attribute.
482 -- If a function that has an sspreq attribute is inlined into a function
483 -- that doesn't have an sspreq attribute or which has an ssp attribute,
484 -- then the resulting function will have an sspreq attribute.
486 -- | This attribute indicates that the code generator should not use a red
487 -- zone, even if the target-specific ABI normally permits it.
489 -- | This attributes disables implicit floating point instructions.
491 -- | This attribute disables prologue / epilogue emission for the function.
492 -- This can have very system-specific consequences.
496 instance Show LlvmFuncAttr where
497 show AlwaysInline = "alwaysinline"
498 show InlineHint = "inlinehint"
499 show NoInline = "noinline"
500 show OptSize = "optsize"
501 show NoReturn = "noreturn"
502 show NoUnwind = "nounwind"
503 show ReadNone = "readnon"
504 show ReadOnly = "readonly"
506 show SspReq = "ssqreq"
507 show NoRedZone = "noredzone"
508 show NoImplicitFloat = "noimplicitfloat"
512 -- | Different types to call a function.
514 -- | Normal call, allocate a new stack frame.
516 -- | Tail call, perform the call in the current stack frame.
520 -- | Different calling conventions a function can use.
521 data LlvmCallConvention
522 -- | The C calling convention.
523 -- This calling convention (the default if no other calling convention is
524 -- specified) matches the target C calling conventions. This calling
525 -- convention supports varargs function calls and tolerates some mismatch in
526 -- the declared prototype and implemented declaration of the function (as
529 -- | This calling convention attempts to make calls as fast as possible
530 -- (e.g. by passing things in registers). This calling convention allows
531 -- the target to use whatever tricks it wants to produce fast code for the
532 -- target, without having to conform to an externally specified ABI
533 -- (Application Binary Interface). Implementations of this convention should
534 -- allow arbitrary tail call optimization to be supported. This calling
535 -- convention does not support varargs and requires the prototype of al
536 -- callees to exactly match the prototype of the function definition.
538 -- | This calling convention attempts to make code in the caller as efficient
539 -- as possible under the assumption that the call is not commonly executed.
540 -- As such, these calls often preserve all registers so that the call does
541 -- not break any live ranges in the caller side. This calling convention
542 -- does not support varargs and requires the prototype of all callees to
543 -- exactly match the prototype of the function definition.
545 -- | Any calling convention may be specified by number, allowing
546 -- target-specific calling conventions to be used. Target specific calling
547 -- conventions start at 64.
549 -- | X86 Specific 'StdCall' convention. LLVM includes a specific alias for it
550 -- rather than just using CC_Ncc.
554 instance Show LlvmCallConvention where
556 show CC_Fastcc = "fastcc"
557 show CC_Coldcc = "coldcc"
558 show (CC_Ncc i) = "cc " ++ show i
559 show CC_X86_Stdcc = "x86_stdcallcc"
562 -- | Functions can have a fixed amount of parameters, or a variable amount.
563 data LlvmParameterListType
564 -- Fixed amount of arguments.
566 -- Variable amount of arguments.
571 -- | Linkage type of a symbol.
573 -- The description of the constructors is copied from the Llvm Assembly Language
574 -- Reference Manual <http://www.llvm.org/docs/LangRef.html#linkage>, because
575 -- they correspond to the Llvm linkage types.
577 -- | Global values with internal linkage are only directly accessible by
578 -- objects in the current module. In particular, linking code into a module
579 -- with an internal global value may cause the internal to be renamed as
580 -- necessary to avoid collisions. Because the symbol is internal to the
581 -- module, all references can be updated. This corresponds to the notion
582 -- of the @static@ keyword in C.
584 -- | Globals with @linkonce@ linkage are merged with other globals of the
585 -- same name when linkage occurs. This is typically used to implement
586 -- inline functions, templates, or other code which must be generated
587 -- in each translation unit that uses it. Unreferenced linkonce globals are
588 -- allowed to be discarded.
590 -- | @weak@ linkage is exactly the same as linkonce linkage, except that
591 -- unreferenced weak globals may not be discarded. This is used for globals
592 -- that may be emitted in multiple translation units, but that are not
593 -- guaranteed to be emitted into every translation unit that uses them. One
594 -- example of this are common globals in C, such as @int X;@ at global
597 -- | @appending@ linkage may only be applied to global variables of pointer
598 -- to array type. When two global variables with appending linkage are
599 -- linked together, the two global arrays are appended together. This is
600 -- the Llvm, typesafe, equivalent of having the system linker append
601 -- together @sections@ with identical names when .o files are linked.
603 -- | The semantics of this linkage follow the ELF model: the symbol is weak
604 -- until linked, if not linked, the symbol becomes null instead of being an
605 -- undefined reference.
607 -- | The symbol participates in linkage and can be used to resolve external
608 -- symbol references.
610 -- | Alias for 'ExternallyVisible' but with explicit textual form in LLVM
615 instance Show LlvmLinkageType where
616 show Internal = "internal"
617 show LinkOnce = "linkonce"
619 show Appending = "appending"
620 show ExternWeak = "extern_weak"
621 -- ExternallyVisible does not have a textual representation, it is
622 -- the linkage type a function resolves to if no other is specified
624 show ExternallyVisible = ""
625 show External = "external"
628 -- -----------------------------------------------------------------------------
632 -- | Llvm binary operators machine operations.
634 = LM_MO_Add -- ^ add two integer, floating point or vector values.
635 | LM_MO_Sub -- ^ subtract two ...
636 | LM_MO_Mul -- ^ multiply ..
637 | LM_MO_UDiv -- ^ unsigned integer or vector division.
638 | LM_MO_SDiv -- ^ signed integer ..
639 | LM_MO_FDiv -- ^ floating point ..
640 | LM_MO_URem -- ^ unsigned integer or vector remainder (mod)
641 | LM_MO_SRem -- ^ signed ...
642 | LM_MO_FRem -- ^ floating point ...
646 -- | Logical shift right
647 -- Shift right, filling with zero
649 -- | Arithmetic shift right
650 -- The most significant bits of the result will be equal to the sign bit of
654 | LM_MO_And -- ^ AND bitwise logical operation.
655 | LM_MO_Or -- ^ OR bitwise logical operation.
656 | LM_MO_Xor -- ^ XOR bitwise logical operation.
659 instance Show LlvmMachOp where
660 show LM_MO_Add = "add"
661 show LM_MO_Sub = "sub"
662 show LM_MO_Mul = "mul"
663 show LM_MO_UDiv = "udiv"
664 show LM_MO_SDiv = "sdiv"
665 show LM_MO_FDiv = "fdiv"
666 show LM_MO_URem = "urem"
667 show LM_MO_SRem = "srem"
668 show LM_MO_FRem = "frem"
669 show LM_MO_Shl = "shl"
670 show LM_MO_LShr = "lshr"
671 show LM_MO_AShr = "ashr"
672 show LM_MO_And = "and"
674 show LM_MO_Xor = "xor"
677 -- | Llvm compare operations.
679 = LM_CMP_Eq -- ^ Equal (Signed and Unsigned)
680 | LM_CMP_Ne -- ^ Not equal (Signed and Unsigned)
681 | LM_CMP_Ugt -- ^ Unsigned greater than
682 | LM_CMP_Uge -- ^ Unsigned greater than or equal
683 | LM_CMP_Ult -- ^ Unsigned less than
684 | LM_CMP_Ule -- ^ Unsigned less than or equal
685 | LM_CMP_Sgt -- ^ Signed greater than
686 | LM_CMP_Sge -- ^ Signed greater than or equal
687 | LM_CMP_Slt -- ^ Signed less than
688 | LM_CMP_Sle -- ^ Signed less than or equal
690 -- Float comparisons. GHC uses a mix of ordered and unordered float
692 | LM_CMP_Feq -- ^ Float equal
693 | LM_CMP_Fne -- ^ Float not equal
694 | LM_CMP_Fgt -- ^ Float greater than
695 | LM_CMP_Fge -- ^ Float greater than or equal
696 | LM_CMP_Flt -- ^ Float less than
697 | LM_CMP_Fle -- ^ Float less than or equal
700 instance Show LlvmCmpOp where
701 show LM_CMP_Eq = "eq"
702 show LM_CMP_Ne = "ne"
703 show LM_CMP_Ugt = "ugt"
704 show LM_CMP_Uge = "uge"
705 show LM_CMP_Ult = "ult"
706 show LM_CMP_Ule = "ule"
707 show LM_CMP_Sgt = "sgt"
708 show LM_CMP_Sge = "sge"
709 show LM_CMP_Slt = "slt"
710 show LM_CMP_Sle = "sle"
711 show LM_CMP_Feq = "oeq"
712 show LM_CMP_Fne = "une"
713 show LM_CMP_Fgt = "ogt"
714 show LM_CMP_Fge = "oge"
715 show LM_CMP_Flt = "olt"
716 show LM_CMP_Fle = "ole"
719 -- | Llvm cast operations.
721 = LM_Trunc -- ^ Integer truncate
722 | LM_Zext -- ^ Integer extend (zero fill)
723 | LM_Sext -- ^ Integer extend (sign fill)
724 | LM_Fptrunc -- ^ Float truncate
725 | LM_Fpext -- ^ Float extend
726 | LM_Fptoui -- ^ Float to unsigned Integer
727 | LM_Fptosi -- ^ Float to signed Integer
728 | LM_Uitofp -- ^ Unsigned Integer to Float
729 | LM_Sitofp -- ^ Signed Int to Float
730 | LM_Ptrtoint -- ^ Pointer to Integer
731 | LM_Inttoptr -- ^ Integer to Pointer
732 | LM_Bitcast -- ^ Cast between types where no bit manipulation is needed
735 instance Show LlvmCastOp where
736 show LM_Trunc = "trunc"
737 show LM_Zext = "zext"
738 show LM_Sext = "sext"
739 show LM_Fptrunc = "fptrunc"
740 show LM_Fpext = "fpext"
741 show LM_Fptoui = "fptoui"
742 show LM_Fptosi = "fptosi"
743 show LM_Uitofp = "uitofp"
744 show LM_Sitofp = "sitofp"
745 show LM_Ptrtoint = "ptrtoint"
746 show LM_Inttoptr = "inttoptr"
747 show LM_Bitcast = "bitcast"
750 -- -----------------------------------------------------------------------------
751 -- * Floating point conversion
754 -- | Convert a Haskell Double to an LLVM hex encoded floating point form. In
755 -- Llvm float literals can be printed in a big-endian hexadecimal format,
756 -- regardless of underlying architecture.
757 dToStr :: Double -> String
759 = let bs = doubleToBytes d
760 hex d' = case showHex d' "" of
761 [] -> error "dToStr: too few hex digits for float"
764 _ -> error "dToStr: too many hex digits for float"
766 str = map toUpper $ concat . fixEndian . (map hex) $ bs
769 -- | Convert a Haskell Float to an LLVM hex encoded floating point form.
770 -- LLVM uses the same encoding for both floats and doubles (16 digit hex
771 -- string) but floats must have the last half all zeroes so it can fit into
772 -- a float size type.
773 {-# NOINLINE fToStr #-}
774 fToStr :: Float -> String
775 fToStr = (dToStr . realToFrac)
777 -- | Reverse or leave byte data alone to fix endianness on this target.
778 fixEndian :: [a] -> [a]
779 #ifdef WORDS_BIGENDIAN