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 VarArgs p _))
61 = show r ++ " (" ++ (either commaCat commaCat p) ++ ", ...)"
62 show (LMFunction (LlvmFunctionDecl _ _ _ r FixedArgs p _))
63 = show r ++ " (" ++ (either commaCat commaCat p) ++ ")"
65 show (LMAlias s _ ) = "%" ++ unpackFS s
67 -- | An LLVM section defenition. If Nothing then let LLVM decide the section
68 type LMSection = Maybe LMString
69 type LMAlign = Maybe Int
70 type LMConst = Bool -- ^ is a variable constant or not
74 -- | Variables with a global scope.
75 = LMGlobalVar LMString LlvmType LlvmLinkageType LMSection LMAlign LMConst
76 -- | Variables local to a function or parameters.
77 | LMLocalVar Unique LlvmType
78 -- | Named local variables. Sometimes we need to be able to explicitly name
79 -- variables (e.g for function arguments).
80 | LMNLocalVar LMString LlvmType
81 -- | A constant variable
85 instance Show LlvmVar where
86 show (LMLitVar x) = show x
87 show (x ) = show (getVarType x) ++ " " ++ getName x
90 -- | Llvm Literal Data.
92 -- These can be used inline in expressions.
94 -- | Refers to an integer constant (i64 42).
95 = LMIntLit Integer LlvmType
96 -- | Floating point literal
97 | LMFloatLit Double LlvmType
100 instance Show LlvmLit where
101 show l = show (getLitType l) ++ " " ++ getLit l
104 -- | Llvm Static Data.
106 -- These represent the possible global level variables and constants.
108 = LMComment LMString -- ^ A comment in a static section
109 | LMStaticLit LlvmLit -- ^ A static variant of a literal value
110 | LMUninitType LlvmType -- ^ For uninitialised data
111 | LMStaticStr LMString LlvmType -- ^ Defines a static 'LMString'
112 | LMStaticArray [LlvmStatic] LlvmType -- ^ A static array
113 | LMStaticStruc [LlvmStatic] LlvmType -- ^ A static structure type
114 | LMStaticPointer LlvmVar -- ^ A pointer to other data
116 -- static expressions, could split out but leave
117 -- for moment for ease of use. Not many of them.
119 | LMBitc LlvmStatic LlvmType -- ^ Pointer to Pointer conversion
120 | LMPtoI LlvmStatic LlvmType -- ^ Pointer to Integer conversion
121 | LMAdd LlvmStatic LlvmStatic -- ^ Constant addition operation
122 | LMSub LlvmStatic LlvmStatic -- ^ Constant subtraction operation
124 instance Show LlvmStatic where
125 show (LMComment s) = "; " ++ unpackFS s
126 show (LMStaticLit l ) = show l
127 show (LMUninitType t) = show t ++ " undef"
128 show (LMStaticStr s t) = show t ++ " c\"" ++ unpackFS s ++ "\\00\""
130 show (LMStaticArray d t)
131 = let struc = case d of
133 ts -> "[" ++ show (head ts) ++
134 concat (map (\x -> "," ++ show x) (tail ts)) ++ "]"
135 in show t ++ " " ++ struc
137 show (LMStaticStruc d t)
138 = let struc = case d of
140 ts -> "{" ++ show (head ts) ++
141 concat (map (\x -> "," ++ show x) (tail ts)) ++ "}"
142 in show t ++ " " ++ struc
144 show (LMStaticPointer v) = show v
147 = show t ++ " bitcast (" ++ show v ++ " to " ++ show t ++ ")"
150 = show t ++ " ptrtoint (" ++ show v ++ " to " ++ show t ++ ")"
153 = let ty1 = getStatType s1
154 in if ty1 == getStatType s2
155 then show ty1 ++ " add (" ++ show s1 ++ "," ++ show s2 ++ ")"
156 else error $ "LMAdd with different types! s1: "
157 ++ show s1 ++ ", s2: " ++ show s2
159 = let ty1 = getStatType s1
160 in if ty1 == getStatType s2
161 then show ty1 ++ " sub (" ++ show s1 ++ "," ++ show s2 ++ ")"
162 else error $ "LMSub with different types! s1: "
163 ++ show s1 ++ ", s2: " ++ show s2
166 -- | Concatenate an array together, separated by commas
167 commaCat :: Show a => [a] -> String
169 commaCat x = show (head x) ++ (concat $ map (\y -> "," ++ show y) (tail x))
171 -- -----------------------------------------------------------------------------
172 -- ** Operations on LLVM Basic Types and Variables
175 -- | Return the variable name or value of the 'LlvmVar'
176 -- in Llvm IR textual representation (e.g. @\@x@, @%y@ or @42@).
177 getName :: LlvmVar -> String
178 getName v@(LMGlobalVar _ _ _ _ _ _) = "@" ++ getPlainName v
179 getName v@(LMLocalVar _ _ ) = "%" ++ getPlainName v
180 getName v@(LMNLocalVar _ _ ) = "%" ++ getPlainName v
181 getName v@(LMLitVar _ ) = getPlainName v
183 -- | Return the variable name or value of the 'LlvmVar'
184 -- in a plain textual representation (e.g. @x@, @y@ or @42@).
185 getPlainName :: LlvmVar -> String
186 getPlainName (LMGlobalVar x _ _ _ _ _) = unpackFS x
187 getPlainName (LMLocalVar x _ ) = show x
188 getPlainName (LMNLocalVar x _ ) = unpackFS x
189 getPlainName (LMLitVar x ) = getLit x
191 -- | Print a literal value. No type.
192 getLit :: LlvmLit -> String
193 getLit (LMIntLit i _) = show ((fromInteger i)::Int)
194 getLit (LMFloatLit r _) = dToStr r
196 -- | Return the 'LlvmType' of the 'LlvmVar'
197 getVarType :: LlvmVar -> LlvmType
198 getVarType (LMGlobalVar _ y _ _ _ _) = y
199 getVarType (LMLocalVar _ y ) = y
200 getVarType (LMNLocalVar _ y ) = y
201 getVarType (LMLitVar l ) = getLitType l
203 -- | Return the 'LlvmType' of a 'LlvmLit'
204 getLitType :: LlvmLit -> LlvmType
205 getLitType (LMIntLit _ t) = t
206 getLitType (LMFloatLit _ t) = t
208 -- | Return the 'LlvmType' of the 'LlvmStatic'
209 getStatType :: LlvmStatic -> LlvmType
210 getStatType (LMStaticLit l ) = getLitType l
211 getStatType (LMUninitType t) = t
212 getStatType (LMStaticStr _ t) = t
213 getStatType (LMStaticArray _ t) = t
214 getStatType (LMStaticStruc _ t) = t
215 getStatType (LMStaticPointer v) = getVarType v
216 getStatType (LMBitc _ t) = t
217 getStatType (LMPtoI _ t) = t
218 getStatType (LMAdd t _) = getStatType t
219 getStatType (LMSub t _) = getStatType t
220 getStatType (LMComment _) = error "Can't call getStatType on LMComment!"
222 -- | Return the 'LlvmType' of the 'LMGlobal'
223 getGlobalType :: LMGlobal -> LlvmType
224 getGlobalType (v, _) = getVarType v
226 -- | Return the 'LlvmVar' part of a 'LMGlobal'
227 getGlobalVar :: LMGlobal -> LlvmVar
228 getGlobalVar (v, _) = v
230 -- | Return the 'LlvmLinkageType' for a 'LlvmVar'
231 getLink :: LlvmVar -> LlvmLinkageType
232 getLink (LMGlobalVar _ _ l _ _ _) = l
235 -- | Add a pointer indirection to the supplied type. 'LMLabel' and 'LMVoid'
237 pLift :: LlvmType -> LlvmType
238 pLift (LMLabel) = error "Labels are unliftable"
239 pLift (LMVoid) = error "Voids are unliftable"
240 pLift x = LMPointer x
242 -- | Lower a variable of 'LMPointer' type.
243 pVarLift :: LlvmVar -> LlvmVar
244 pVarLift (LMGlobalVar s t l x a c) = LMGlobalVar s (pLift t) l x a c
245 pVarLift (LMLocalVar s t ) = LMLocalVar s (pLift t)
246 pVarLift (LMNLocalVar s t ) = LMNLocalVar s (pLift t)
247 pVarLift (LMLitVar _ ) = error $ "Can't lower a literal type!"
249 -- | Remove the pointer indirection of the supplied type. Only 'LMPointer'
250 -- constructors can be lowered.
251 pLower :: LlvmType -> LlvmType
252 pLower (LMPointer x) = x
253 pLower x = error $ show x ++ " is a unlowerable type, need a pointer"
255 -- | Lower a variable of 'LMPointer' type.
256 pVarLower :: LlvmVar -> LlvmVar
257 pVarLower (LMGlobalVar s t l x a c) = LMGlobalVar s (pLower t) l x a c
258 pVarLower (LMLocalVar s t ) = LMLocalVar s (pLower t)
259 pVarLower (LMNLocalVar s t ) = LMNLocalVar s (pLower t)
260 pVarLower (LMLitVar _ ) = error $ "Can't lower a literal type!"
262 -- | Test if the given 'LlvmType' is an integer
263 isInt :: LlvmType -> Bool
264 isInt (LMInt _) = True
267 -- | Test if the given 'LlvmType' is a floating point type
268 isFloat :: LlvmType -> Bool
269 isFloat LMFloat = True
270 isFloat LMDouble = True
271 isFloat LMFloat80 = True
272 isFloat LMFloat128 = True
275 -- | Test if the given 'LlvmType' is an 'LMPointer' construct
276 isPointer :: LlvmType -> Bool
277 isPointer (LMPointer _) = True
280 -- | Test if a 'LlvmVar' is global.
281 isGlobal :: LlvmVar -> Bool
282 isGlobal (LMGlobalVar _ _ _ _ _ _) = True
285 -- | Width in bits of an 'LlvmType', returns 0 if not applicable
286 llvmWidthInBits :: LlvmType -> Int
287 llvmWidthInBits (LMInt n) = n
288 llvmWidthInBits (LMFloat) = 32
289 llvmWidthInBits (LMDouble) = 64
290 llvmWidthInBits (LMFloat80) = 80
291 llvmWidthInBits (LMFloat128) = 128
292 -- Could return either a pointer width here or the width of what
293 -- it points to. We will go with the former for now.
294 llvmWidthInBits (LMPointer _) = llvmWidthInBits llvmWord
295 llvmWidthInBits (LMArray _ _) = llvmWidthInBits llvmWord
296 llvmWidthInBits LMLabel = 0
297 llvmWidthInBits LMVoid = 0
298 llvmWidthInBits (LMStruct tys) = sum $ map llvmWidthInBits tys
299 llvmWidthInBits (LMFunction _) = 0
300 llvmWidthInBits (LMAlias _ t) = llvmWidthInBits t
303 -- -----------------------------------------------------------------------------
304 -- ** Shortcut for Common Types
307 i128, i64, i32, i16, i8, i1, i8Ptr :: LlvmType
316 -- | The target architectures word size
317 llvmWord, llvmWordPtr :: LlvmType
318 llvmWord = LMInt (wORD_SIZE * 8)
319 llvmWordPtr = pLift llvmWord
321 -- -----------------------------------------------------------------------------
322 -- * LLVM Function Types
325 -- | An LLVM Function
326 data LlvmFunctionDecl = LlvmFunctionDecl {
327 -- | Unique identifier of the function.
329 -- | LinkageType of the function.
330 funcLinkage :: LlvmLinkageType,
331 -- | The calling convention of the function.
332 funcCc :: LlvmCallConvention,
333 -- | Type of the returned value
334 decReturnType :: LlvmType,
335 -- | Indicates if this function uses varargs
336 decVarargs :: LlvmParameterListType,
337 -- | Signature of the parameters, can be just types or full vars
338 -- if parameter names are required.
339 decParams :: Either [LlvmType] [LlvmVar],
340 -- | Function align value, must be power of 2
345 instance Show LlvmFunctionDecl where
346 show (LlvmFunctionDecl n l c r varg p a)
347 = let varg' = if varg == VarArgs then ", ..." else ""
349 Just a' -> " align " ++ show a'
351 in show l ++ " " ++ show c ++ " " ++ show r ++ " @" ++ unpackFS n ++
352 "(" ++ (either commaCat commaCat p) ++ varg' ++ ")" ++ align
354 type LlvmFunctionDecls = [LlvmFunctionDecl]
357 -- | Llvm Function Attributes.
359 -- Function attributes are set to communicate additional information about a
360 -- function. Function attributes are considered to be part of the function,
361 -- not of the function type, so functions with different parameter attributes
362 -- can have the same function type. Functions can have multiple attributes.
364 -- Descriptions taken from <http://llvm.org/docs/LangRef.html#fnattrs>
366 -- | This attribute indicates that the inliner should attempt to inline this
367 -- function into callers whenever possible, ignoring any active inlining
368 -- size threshold for this caller.
370 -- | This attribute indicates that the source code contained a hint that
371 -- inlining this function is desirable (such as the \"inline\" keyword in
372 -- C/C++). It is just a hint; it imposes no requirements on the inliner.
374 -- | This attribute indicates that the inliner should never inline this
375 -- function in any situation. This attribute may not be used together
376 -- with the alwaysinline attribute.
378 -- | This attribute suggests that optimization passes and code generator
379 -- passes make choices that keep the code size of this function low, and
380 -- otherwise do optimizations specifically to reduce code size.
382 -- | This function attribute indicates that the function never returns
383 -- normally. This produces undefined behavior at runtime if the function
384 -- ever does dynamically return.
386 -- | This function attribute indicates that the function never returns with
387 -- an unwind or exceptional control flow. If the function does unwind, its
388 -- runtime behavior is undefined.
390 -- | This attribute indicates that the function computes its result (or
391 -- decides to unwind an exception) based strictly on its arguments, without
392 -- dereferencing any pointer arguments or otherwise accessing any mutable
393 -- state (e.g. memory, control registers, etc) visible to caller functions.
394 -- It does not write through any pointer arguments (including byval
395 -- arguments) and never changes any state visible to callers. This means
396 -- that it cannot unwind exceptions by calling the C++ exception throwing
397 -- methods, but could use the unwind instruction.
399 -- | This attribute indicates that the function does not write through any
400 -- pointer arguments (including byval arguments) or otherwise modify any
401 -- state (e.g. memory, control registers, etc) visible to caller functions.
402 -- It may dereference pointer arguments and read state that may be set in
403 -- the caller. A readonly function always returns the same value (or unwinds
404 -- an exception identically) when called with the same set of arguments and
405 -- global state. It cannot unwind an exception by calling the C++ exception
406 -- throwing methods, but may use the unwind instruction.
408 -- | This attribute indicates that the function should emit a stack smashing
409 -- protector. It is in the form of a \"canary\"—a random value placed on the
410 -- stack before the local variables that's checked upon return from the
411 -- function to see if it has been overwritten. A heuristic is used to
412 -- determine if a function needs stack protectors or not.
414 -- If a function that has an ssp attribute is inlined into a function that
415 -- doesn't have an ssp attribute, then the resulting function will have an
418 -- | This attribute indicates that the function should always emit a stack
419 -- smashing protector. This overrides the ssp function attribute.
421 -- If a function that has an sspreq attribute is inlined into a function
422 -- that doesn't have an sspreq attribute or which has an ssp attribute,
423 -- then the resulting function will have an sspreq attribute.
425 -- | This attribute indicates that the code generator should not use a red
426 -- zone, even if the target-specific ABI normally permits it.
428 -- | This attributes disables implicit floating point instructions.
430 -- | This attribute disables prologue / epilogue emission for the function.
431 -- This can have very system-specific consequences.
435 instance Show LlvmFuncAttr where
436 show AlwaysInline = "alwaysinline"
437 show InlineHint = "inlinehint"
438 show NoInline = "noinline"
439 show OptSize = "optsize"
440 show NoReturn = "noreturn"
441 show NoUnwind = "nounwind"
442 show ReadNone = "readnon"
443 show ReadOnly = "readonly"
445 show SspReq = "ssqreq"
446 show NoRedZone = "noredzone"
447 show NoImplicitFloat = "noimplicitfloat"
451 -- | Different types to call a function.
453 -- | Normal call, allocate a new stack frame.
455 -- | Tail call, perform the call in the current stack frame.
459 -- | Different calling conventions a function can use.
460 data LlvmCallConvention
461 -- | The C calling convention.
462 -- This calling convention (the default if no other calling convention is
463 -- specified) matches the target C calling conventions. This calling
464 -- convention supports varargs function calls and tolerates some mismatch in
465 -- the declared prototype and implemented declaration of the function (as
468 -- | This calling convention attempts to make calls as fast as possible
469 -- (e.g. by passing things in registers). This calling convention allows
470 -- the target to use whatever tricks it wants to produce fast code for the
471 -- target, without having to conform to an externally specified ABI
472 -- (Application Binary Interface). Implementations of this convention should
473 -- allow arbitrary tail call optimization to be supported. This calling
474 -- convention does not support varargs and requires the prototype of al
475 -- callees to exactly match the prototype of the function definition.
477 -- | This calling convention attempts to make code in the caller as efficient
478 -- as possible under the assumption that the call is not commonly executed.
479 -- As such, these calls often preserve all registers so that the call does
480 -- not break any live ranges in the caller side. This calling convention
481 -- does not support varargs and requires the prototype of all callees to
482 -- exactly match the prototype of the function definition.
484 -- | Any calling convention may be specified by number, allowing
485 -- target-specific calling conventions to be used. Target specific calling
486 -- conventions start at 64.
488 -- | X86 Specific 'StdCall' convention. LLVM includes a specific alias for it
489 -- rather than just using CC_Ncc.
493 instance Show LlvmCallConvention where
495 show CC_Fastcc = "fastcc"
496 show CC_Coldcc = "coldcc"
497 show (CC_Ncc i) = "cc " ++ show i
498 show CC_X86_Stdcc = "x86_stdcallcc"
501 -- | Functions can have a fixed amount of parameters, or a variable amount.
502 data LlvmParameterListType
503 -- Fixed amount of arguments.
505 -- Variable amount of arguments.
510 -- | Linkage type of a symbol.
512 -- The description of the constructors is copied from the Llvm Assembly Language
513 -- Reference Manual <http://www.llvm.org/docs/LangRef.html#linkage>, because
514 -- they correspond to the Llvm linkage types.
516 -- | Global values with internal linkage are only directly accessible by
517 -- objects in the current module. In particular, linking code into a module
518 -- with an internal global value may cause the internal to be renamed as
519 -- necessary to avoid collisions. Because the symbol is internal to the
520 -- module, all references can be updated. This corresponds to the notion
521 -- of the @static@ keyword in C.
523 -- | Globals with @linkonce@ linkage are merged with other globals of the
524 -- same name when linkage occurs. This is typically used to implement
525 -- inline functions, templates, or other code which must be generated
526 -- in each translation unit that uses it. Unreferenced linkonce globals are
527 -- allowed to be discarded.
529 -- | @weak@ linkage is exactly the same as linkonce linkage, except that
530 -- unreferenced weak globals may not be discarded. This is used for globals
531 -- that may be emitted in multiple translation units, but that are not
532 -- guaranteed to be emitted into every translation unit that uses them. One
533 -- example of this are common globals in C, such as @int X;@ at global
536 -- | @appending@ linkage may only be applied to global variables of pointer
537 -- to array type. When two global variables with appending linkage are
538 -- linked together, the two global arrays are appended together. This is
539 -- the Llvm, typesafe, equivalent of having the system linker append
540 -- together @sections@ with identical names when .o files are linked.
542 -- | The semantics of this linkage follow the ELF model: the symbol is weak
543 -- until linked, if not linked, the symbol becomes null instead of being an
544 -- undefined reference.
546 -- | The symbol participates in linkage and can be used to resolve external
547 -- symbol references.
549 -- | Alias for 'ExternallyVisible' but with explicit textual form in LLVM
554 instance Show LlvmLinkageType where
555 show Internal = "internal"
556 show LinkOnce = "linkonce"
558 show Appending = "appending"
559 show ExternWeak = "extern_weak"
560 -- ExternallyVisible does not have a textual representation, it is
561 -- the linkage type a function resolves to if no other is specified
563 show ExternallyVisible = ""
564 show External = "external"
567 -- -----------------------------------------------------------------------------
571 -- | Llvm binary operators machine operations.
573 = LM_MO_Add -- ^ add two integer, floating point or vector values.
574 | LM_MO_Sub -- ^ subtract two ...
575 | LM_MO_Mul -- ^ multiply ..
576 | LM_MO_UDiv -- ^ unsigned integer or vector division.
577 | LM_MO_SDiv -- ^ signed integer ..
578 | LM_MO_FDiv -- ^ floating point ..
579 | LM_MO_URem -- ^ unsigned integer or vector remainder (mod)
580 | LM_MO_SRem -- ^ signed ...
581 | LM_MO_FRem -- ^ floating point ...
585 -- | Logical shift right
586 -- Shift right, filling with zero
588 -- | Arithmetic shift right
589 -- The most significant bits of the result will be equal to the sign bit of
593 | LM_MO_And -- ^ AND bitwise logical operation.
594 | LM_MO_Or -- ^ OR bitwise logical operation.
595 | LM_MO_Xor -- ^ XOR bitwise logical operation.
598 instance Show LlvmMachOp where
599 show LM_MO_Add = "add"
600 show LM_MO_Sub = "sub"
601 show LM_MO_Mul = "mul"
602 show LM_MO_UDiv = "udiv"
603 show LM_MO_SDiv = "sdiv"
604 show LM_MO_FDiv = "fdiv"
605 show LM_MO_URem = "urem"
606 show LM_MO_SRem = "srem"
607 show LM_MO_FRem = "frem"
608 show LM_MO_Shl = "shl"
609 show LM_MO_LShr = "lshr"
610 show LM_MO_AShr = "ashr"
611 show LM_MO_And = "and"
613 show LM_MO_Xor = "xor"
616 -- | Llvm compare operations.
618 = LM_CMP_Eq -- ^ Equal (Signed and Unsigned)
619 | LM_CMP_Ne -- ^ Not equal (Signed and Unsigned)
620 | LM_CMP_Ugt -- ^ Unsigned greater than
621 | LM_CMP_Uge -- ^ Unsigned greater than or equal
622 | LM_CMP_Ult -- ^ Unsigned less than
623 | LM_CMP_Ule -- ^ Unsigned less than or equal
624 | LM_CMP_Sgt -- ^ Signed greater than
625 | LM_CMP_Sge -- ^ Signed greater than or equal
626 | LM_CMP_Slt -- ^ Signed less than
627 | LM_CMP_Sle -- ^ Signed less than or equal
629 -- Float comparisons. GHC uses a mix of ordered and unordered float
631 | LM_CMP_Feq -- ^ Float equal
632 | LM_CMP_Fne -- ^ Float not equal
633 | LM_CMP_Fgt -- ^ Float greater than
634 | LM_CMP_Fge -- ^ Float greater than or equal
635 | LM_CMP_Flt -- ^ Float less than
636 | LM_CMP_Fle -- ^ Float less than or equal
639 instance Show LlvmCmpOp where
640 show LM_CMP_Eq = "eq"
641 show LM_CMP_Ne = "ne"
642 show LM_CMP_Ugt = "ugt"
643 show LM_CMP_Uge = "uge"
644 show LM_CMP_Ult = "ult"
645 show LM_CMP_Ule = "ule"
646 show LM_CMP_Sgt = "sgt"
647 show LM_CMP_Sge = "sge"
648 show LM_CMP_Slt = "slt"
649 show LM_CMP_Sle = "sle"
650 show LM_CMP_Feq = "oeq"
651 show LM_CMP_Fne = "une"
652 show LM_CMP_Fgt = "ogt"
653 show LM_CMP_Fge = "oge"
654 show LM_CMP_Flt = "olt"
655 show LM_CMP_Fle = "ole"
658 -- | Llvm cast operations.
660 = LM_Trunc -- ^ Integer truncate
661 | LM_Zext -- ^ Integer extend (zero fill)
662 | LM_Sext -- ^ Integer extend (sign fill)
663 | LM_Fptrunc -- ^ Float truncate
664 | LM_Fpext -- ^ Float extend
665 | LM_Fptoui -- ^ Float to unsigned Integer
666 | LM_Fptosi -- ^ Float to signed Integer
667 | LM_Uitofp -- ^ Unsigned Integer to Float
668 | LM_Sitofp -- ^ Signed Int to Float
669 | LM_Ptrtoint -- ^ Pointer to Integer
670 | LM_Inttoptr -- ^ Integer to Pointer
671 | LM_Bitcast -- ^ Cast between types where no bit manipulation is needed
674 instance Show LlvmCastOp where
675 show LM_Trunc = "trunc"
676 show LM_Zext = "zext"
677 show LM_Sext = "sext"
678 show LM_Fptrunc = "fptrunc"
679 show LM_Fpext = "fpext"
680 show LM_Fptoui = "fptoui"
681 show LM_Fptosi = "fptosi"
682 show LM_Uitofp = "uitofp"
683 show LM_Sitofp = "sitofp"
684 show LM_Ptrtoint = "ptrtoint"
685 show LM_Inttoptr = "inttoptr"
686 show LM_Bitcast = "bitcast"
689 -- -----------------------------------------------------------------------------
690 -- * Floating point conversion
693 -- | Convert a Haskell Double to an LLVM hex encoded floating point form. In
694 -- Llvm float literals can be printed in a big-endian hexadecimal format,
695 -- regardless of underlying architecture.
696 dToStr :: Double -> String
698 = let bs = doubleToBytes d
699 hex d' = case showHex d' "" of
700 [] -> error "dToStr: too few hex digits for float"
703 _ -> error "dToStr: too many hex digits for float"
705 str = map toUpper $ concat . fixEndian . (map hex) $ bs
708 -- | Reverse or leave byte data alone to fix endianness on this target.
709 fixEndian :: [a] -> [a]
710 #ifdef WORDS_BIGENDIAN