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)
26 -- | A global constant variable
27 type LMConstant = (LlvmVar, LlvmStatic)
29 type LMString = FastString
34 = LMInt Int -- ^ An integer with a given width in bits.
35 | LMFloat -- ^ 32 bit floating point
36 | LMDouble -- ^ 64 bit floating point
37 | LMFloat80 -- ^ 80 bit (x86 only) floating point
38 | LMFloat128 -- ^ 128 bit floating point
39 | LMPointer LlvmType -- ^ A pointer to a 'LlvmType'
40 | LMArray Int LlvmType -- ^ An array of 'LlvmType'
41 | LMLabel -- ^ A 'LlvmVar' can represent a label (address)
42 | LMVoid -- ^ Void type
43 | LMStruct [LlvmType] -- ^ Structure type
44 | LMAlias LMString LlvmType -- ^ A type alias
46 -- | Function type, used to create pointers to functions
47 | LMFunction LlvmFunctionDecl
50 instance Show LlvmType where
51 show (LMInt size ) = "i" ++ show size
52 show (LMFloat ) = "float"
53 show (LMDouble ) = "double"
54 show (LMFloat80 ) = "x86_fp80"
55 show (LMFloat128 ) = "fp128"
56 show (LMPointer x ) = show x ++ "*"
57 show (LMArray nr tp ) = "[" ++ show nr ++ " x " ++ show tp ++ "]"
58 show (LMLabel ) = "label"
59 show (LMVoid ) = "void"
60 show (LMStruct tys ) = "{" ++ (commaCat tys) ++ "}"
62 show (LMFunction (LlvmFunctionDecl _ _ _ r VarArgs p _))
63 = show r ++ " (" ++ (either commaCat commaCat p) ++ ", ...)"
64 show (LMFunction (LlvmFunctionDecl _ _ _ r FixedArgs p _))
65 = show r ++ " (" ++ (either commaCat commaCat p) ++ ")"
67 show (LMAlias s _ ) = "%" ++ unpackFS s
69 -- | An LLVM section defenition. If Nothing then let LLVM decide the section
70 type LMSection = Maybe LMString
71 type LMAlign = Maybe Int
75 -- | Variables with a global scope.
76 = LMGlobalVar LMString LlvmType LlvmLinkageType LMSection LMAlign
77 -- | Variables local to a function or parameters.
78 | LMLocalVar Unique LlvmType
79 -- | Named local variables. Sometimes we need to be able to explicitly name
80 -- variables (e.g for function arguments).
81 | LMNLocalVar LMString LlvmType
82 -- | A constant variable
86 instance Show LlvmVar where
87 show (LMLitVar x) = show x
88 show (x ) = show (getVarType x) ++ " " ++ getName x
91 -- | Llvm Literal Data.
93 -- These can be used inline in expressions.
95 -- | Refers to an integer constant (i64 42).
96 = LMIntLit Integer LlvmType
97 -- | Floating point literal
98 | LMFloatLit Double LlvmType
101 instance Show LlvmLit where
102 show l = show (getLitType l) ++ " " ++ getLit l
105 -- | Llvm Static Data.
107 -- These represent the possible global level variables and constants.
109 = LMComment LMString -- ^ A comment in a static section
110 | LMStaticLit LlvmLit -- ^ A static variant of a literal value
111 | LMUninitType LlvmType -- ^ For uninitialised data
112 | LMStaticStr LMString LlvmType -- ^ Defines a static 'LMString'
113 | LMStaticArray [LlvmStatic] LlvmType -- ^ A static array
114 | LMStaticStruc [LlvmStatic] LlvmType -- ^ A static structure type
115 | LMStaticPointer LlvmVar -- ^ A pointer to other data
117 -- static expressions, could split out but leave
118 -- for moment for ease of use. Not many of them.
120 | LMBitc LlvmStatic LlvmType -- ^ Pointer to Pointer conversion
121 | LMPtoI LlvmStatic LlvmType -- ^ Pointer to Integer conversion
122 | LMAdd LlvmStatic LlvmStatic -- ^ Constant addition operation
123 | LMSub LlvmStatic LlvmStatic -- ^ Constant subtraction operation
125 instance Show LlvmStatic where
126 show (LMComment s) = "; " ++ unpackFS s
127 show (LMStaticLit l ) = show l
128 show (LMUninitType t) = show t ++ " undef"
129 show (LMStaticStr s t) = show t ++ " c\"" ++ unpackFS s ++ "\\00\""
131 show (LMStaticArray d t)
132 = let struc = case d of
134 ts -> "[" ++ show (head ts) ++
135 concat (map (\x -> "," ++ show x) (tail ts)) ++ "]"
136 in show t ++ " " ++ struc
138 show (LMStaticStruc d t)
139 = let struc = case d of
141 ts -> "{" ++ show (head ts) ++
142 concat (map (\x -> "," ++ show x) (tail ts)) ++ "}"
143 in show t ++ " " ++ struc
145 show (LMStaticPointer v) = show v
148 = show t ++ " bitcast (" ++ show v ++ " to " ++ show t ++ ")"
151 = show t ++ " ptrtoint (" ++ show v ++ " to " ++ show t ++ ")"
154 = let ty1 = getStatType s1
155 in if ty1 == getStatType s2
156 then show ty1 ++ " add (" ++ show s1 ++ "," ++ show s2 ++ ")"
157 else error $ "LMAdd with different types! s1: "
158 ++ show s1 ++ ", s2: " ++ show s2
160 = let ty1 = getStatType s1
161 in if ty1 == getStatType s2
162 then show ty1 ++ " sub (" ++ show s1 ++ "," ++ show s2 ++ ")"
163 else error $ "LMSub with different types! s1: "
164 ++ show s1 ++ ", s2: " ++ show s2
167 -- | Concatenate an array together, separated by commas
168 commaCat :: Show a => [a] -> String
170 commaCat x = show (head x) ++ (concat $ map (\y -> "," ++ show y) (tail x))
172 -- -----------------------------------------------------------------------------
173 -- ** Operations on LLVM Basic Types and Variables
176 -- | Return the variable name or value of the 'LlvmVar'
177 -- in Llvm IR textual representation (e.g. @\@x@, @%y@ or @42@).
178 getName :: LlvmVar -> String
179 getName v@(LMGlobalVar _ _ _ _ _) = "@" ++ getPlainName v
180 getName v@(LMLocalVar _ _ ) = "%" ++ getPlainName v
181 getName v@(LMNLocalVar _ _ ) = "%" ++ getPlainName v
182 getName v@(LMLitVar _ ) = getPlainName v
184 -- | Return the variable name or value of the 'LlvmVar'
185 -- in a plain textual representation (e.g. @x@, @y@ or @42@).
186 getPlainName :: LlvmVar -> String
187 getPlainName (LMGlobalVar x _ _ _ _) = unpackFS x
188 getPlainName (LMLocalVar x _ ) = show x
189 getPlainName (LMNLocalVar x _ ) = unpackFS x
190 getPlainName (LMLitVar x ) = getLit x
192 -- | Print a literal value. No type.
193 getLit :: LlvmLit -> String
194 getLit (LMIntLit i _) = show ((fromInteger i)::Int)
195 getLit (LMFloatLit r _) = dToStr r
197 -- | Return the 'LlvmType' of the 'LlvmVar'
198 getVarType :: LlvmVar -> LlvmType
199 getVarType (LMGlobalVar _ y _ _ _) = y
200 getVarType (LMLocalVar _ y ) = y
201 getVarType (LMNLocalVar _ y ) = y
202 getVarType (LMLitVar l ) = getLitType l
204 -- | Return the 'LlvmType' of a 'LlvmLit'
205 getLitType :: LlvmLit -> LlvmType
206 getLitType (LMIntLit _ t) = t
207 getLitType (LMFloatLit _ t) = t
209 -- | Return the 'LlvmType' of the 'LlvmStatic'
210 getStatType :: LlvmStatic -> LlvmType
211 getStatType (LMStaticLit l ) = getLitType l
212 getStatType (LMUninitType t) = t
213 getStatType (LMStaticStr _ t) = t
214 getStatType (LMStaticArray _ t) = t
215 getStatType (LMStaticStruc _ t) = t
216 getStatType (LMStaticPointer v) = getVarType v
217 getStatType (LMBitc _ t) = t
218 getStatType (LMPtoI _ t) = t
219 getStatType (LMAdd t _) = getStatType t
220 getStatType (LMSub t _) = getStatType t
221 getStatType (LMComment _) = error "Can't call getStatType on LMComment!"
223 -- | Return the 'LlvmType' of the 'LMGlobal'
224 getGlobalType :: LMGlobal -> LlvmType
225 getGlobalType (v, _) = getVarType v
227 -- | Return the 'LlvmVar' part of a 'LMGlobal'
228 getGlobalVar :: LMGlobal -> LlvmVar
229 getGlobalVar (v, _) = v
231 -- | Return the 'LlvmLinkageType' for a 'LlvmVar'
232 getLink :: LlvmVar -> LlvmLinkageType
233 getLink (LMGlobalVar _ _ l _ _) = l
236 -- | Add a pointer indirection to the supplied type. 'LMLabel' and 'LMVoid'
238 pLift :: LlvmType -> LlvmType
239 pLift (LMLabel) = error "Labels are unliftable"
240 pLift (LMVoid) = error "Voids are unliftable"
241 pLift x = LMPointer x
243 -- | Lower a variable of 'LMPointer' type.
244 pVarLift :: LlvmVar -> LlvmVar
245 pVarLift (LMGlobalVar s t l x a) = LMGlobalVar s (pLift t) l x a
246 pVarLift (LMLocalVar s t ) = LMLocalVar s (pLift t)
247 pVarLift (LMNLocalVar s t ) = LMNLocalVar s (pLift t)
248 pVarLift (LMLitVar _ ) = error $ "Can't lower a literal type!"
250 -- | Remove the pointer indirection of the supplied type. Only 'LMPointer'
251 -- constructors can be lowered.
252 pLower :: LlvmType -> LlvmType
253 pLower (LMPointer x) = x
254 pLower x = error $ show x ++ " is a unlowerable type, need a pointer"
256 -- | Lower a variable of 'LMPointer' type.
257 pVarLower :: LlvmVar -> LlvmVar
258 pVarLower (LMGlobalVar s t l x a) = LMGlobalVar s (pLower t) l x a
259 pVarLower (LMLocalVar s t ) = LMLocalVar s (pLower t)
260 pVarLower (LMNLocalVar s t ) = LMNLocalVar s (pLower t)
261 pVarLower (LMLitVar _ ) = error $ "Can't lower a literal type!"
263 -- | Test if the given 'LlvmType' is an integer
264 isInt :: LlvmType -> Bool
265 isInt (LMInt _) = True
268 -- | Test if the given 'LlvmType' is a floating point type
269 isFloat :: LlvmType -> Bool
270 isFloat LMFloat = True
271 isFloat LMDouble = True
272 isFloat LMFloat80 = True
273 isFloat LMFloat128 = True
276 -- | Test if the given 'LlvmType' is an 'LMPointer' construct
277 isPointer :: LlvmType -> Bool
278 isPointer (LMPointer _) = True
281 -- | Test if a 'LlvmVar' is global.
282 isGlobal :: LlvmVar -> Bool
283 isGlobal (LMGlobalVar _ _ _ _ _) = True
286 -- | Width in bits of an 'LlvmType', returns 0 if not applicable
287 llvmWidthInBits :: LlvmType -> Int
288 llvmWidthInBits (LMInt n) = n
289 llvmWidthInBits (LMFloat) = 32
290 llvmWidthInBits (LMDouble) = 64
291 llvmWidthInBits (LMFloat80) = 80
292 llvmWidthInBits (LMFloat128) = 128
293 -- Could return either a pointer width here or the width of what
294 -- it points to. We will go with the former for now.
295 llvmWidthInBits (LMPointer _) = llvmWidthInBits llvmWord
296 llvmWidthInBits (LMArray _ _) = llvmWidthInBits llvmWord
297 llvmWidthInBits LMLabel = 0
298 llvmWidthInBits LMVoid = 0
299 llvmWidthInBits (LMStruct tys) = sum $ map llvmWidthInBits tys
300 llvmWidthInBits (LMFunction _) = 0
301 llvmWidthInBits (LMAlias _ t) = llvmWidthInBits t
304 -- -----------------------------------------------------------------------------
305 -- ** Shortcut for Common Types
308 i128, i64, i32, i16, i8, i1, i8Ptr :: LlvmType
317 -- | The target architectures word size
318 llvmWord, llvmWordPtr :: LlvmType
319 llvmWord = LMInt (wORD_SIZE * 8)
320 llvmWordPtr = pLift llvmWord
322 -- -----------------------------------------------------------------------------
323 -- * LLVM Function Types
326 -- | An LLVM Function
327 data LlvmFunctionDecl = LlvmFunctionDecl {
328 -- | Unique identifier of the function.
330 -- | LinkageType of the function.
331 funcLinkage :: LlvmLinkageType,
332 -- | The calling convention of the function.
333 funcCc :: LlvmCallConvention,
334 -- | Type of the returned value
335 decReturnType :: LlvmType,
336 -- | Indicates if this function uses varargs
337 decVarargs :: LlvmParameterListType,
338 -- | Signature of the parameters, can be just types or full vars
339 -- if parameter names are required.
340 decParams :: Either [LlvmType] [LlvmVar],
341 -- | Function align value, must be power of 2
346 instance Show LlvmFunctionDecl where
347 show (LlvmFunctionDecl n l c r varg p a)
348 = let varg' = if varg == VarArgs then ", ..." else ""
350 Just a' -> " align " ++ show a'
352 in show l ++ " " ++ show c ++ " " ++ show r ++ " @" ++ unpackFS n ++
353 "(" ++ (either commaCat commaCat p) ++ varg' ++ ")" ++ align
355 type LlvmFunctionDecls = [LlvmFunctionDecl]
358 -- | Llvm Function Attributes.
360 -- Function attributes are set to communicate additional information about a
361 -- function. Function attributes are considered to be part of the function,
362 -- not of the function type, so functions with different parameter attributes
363 -- can have the same function type. Functions can have multiple attributes.
365 -- Descriptions taken from <http://llvm.org/docs/LangRef.html#fnattrs>
367 -- | This attribute indicates that the inliner should attempt to inline this
368 -- function into callers whenever possible, ignoring any active inlining
369 -- size threshold for this caller.
371 -- | This attribute indicates that the source code contained a hint that
372 -- inlining this function is desirable (such as the \"inline\" keyword in
373 -- C/C++). It is just a hint; it imposes no requirements on the inliner.
375 -- | This attribute indicates that the inliner should never inline this
376 -- function in any situation. This attribute may not be used together
377 -- with the alwaysinline attribute.
379 -- | This attribute suggests that optimization passes and code generator
380 -- passes make choices that keep the code size of this function low, and
381 -- otherwise do optimizations specifically to reduce code size.
383 -- | This function attribute indicates that the function never returns
384 -- normally. This produces undefined behavior at runtime if the function
385 -- ever does dynamically return.
387 -- | This function attribute indicates that the function never returns with
388 -- an unwind or exceptional control flow. If the function does unwind, its
389 -- runtime behavior is undefined.
391 -- | This attribute indicates that the function computes its result (or
392 -- decides to unwind an exception) based strictly on its arguments, without
393 -- dereferencing any pointer arguments or otherwise accessing any mutable
394 -- state (e.g. memory, control registers, etc) visible to caller functions.
395 -- It does not write through any pointer arguments (including byval
396 -- arguments) and never changes any state visible to callers. This means
397 -- that it cannot unwind exceptions by calling the C++ exception throwing
398 -- methods, but could use the unwind instruction.
400 -- | This attribute indicates that the function does not write through any
401 -- pointer arguments (including byval arguments) or otherwise modify any
402 -- state (e.g. memory, control registers, etc) visible to caller functions.
403 -- It may dereference pointer arguments and read state that may be set in
404 -- the caller. A readonly function always returns the same value (or unwinds
405 -- an exception identically) when called with the same set of arguments and
406 -- global state. It cannot unwind an exception by calling the C++ exception
407 -- throwing methods, but may use the unwind instruction.
409 -- | This attribute indicates that the function should emit a stack smashing
410 -- protector. It is in the form of a \"canary\"—a random value placed on the
411 -- stack before the local variables that's checked upon return from the
412 -- function to see if it has been overwritten. A heuristic is used to
413 -- determine if a function needs stack protectors or not.
415 -- If a function that has an ssp attribute is inlined into a function that
416 -- doesn't have an ssp attribute, then the resulting function will have an
419 -- | This attribute indicates that the function should always emit a stack
420 -- smashing protector. This overrides the ssp function attribute.
422 -- If a function that has an sspreq attribute is inlined into a function
423 -- that doesn't have an sspreq attribute or which has an ssp attribute,
424 -- then the resulting function will have an sspreq attribute.
426 -- | This attribute indicates that the code generator should not use a red
427 -- zone, even if the target-specific ABI normally permits it.
429 -- | This attributes disables implicit floating point instructions.
431 -- | This attribute disables prologue / epilogue emission for the function.
432 -- This can have very system-specific consequences.
436 instance Show LlvmFuncAttr where
437 show AlwaysInline = "alwaysinline"
438 show InlineHint = "inlinehint"
439 show NoInline = "noinline"
440 show OptSize = "optsize"
441 show NoReturn = "noreturn"
442 show NoUnwind = "nounwind"
443 show ReadNone = "readnon"
444 show ReadOnly = "readonly"
446 show SspReq = "ssqreq"
447 show NoRedZone = "noredzone"
448 show NoImplicitFloat = "noimplicitfloat"
452 -- | Different types to call a function.
454 -- | Normal call, allocate a new stack frame.
456 -- | Tail call, perform the call in the current stack frame.
460 -- | Different calling conventions a function can use.
461 data LlvmCallConvention
462 -- | The C calling convention.
463 -- This calling convention (the default if no other calling convention is
464 -- specified) matches the target C calling conventions. This calling
465 -- convention supports varargs function calls and tolerates some mismatch in
466 -- the declared prototype and implemented declaration of the function (as
469 -- | This calling convention attempts to make calls as fast as possible
470 -- (e.g. by passing things in registers). This calling convention allows
471 -- the target to use whatever tricks it wants to produce fast code for the
472 -- target, without having to conform to an externally specified ABI
473 -- (Application Binary Interface). Implementations of this convention should
474 -- allow arbitrary tail call optimization to be supported. This calling
475 -- convention does not support varargs and requires the prototype of al
476 -- callees to exactly match the prototype of the function definition.
478 -- | This calling convention attempts to make code in the caller as efficient
479 -- as possible under the assumption that the call is not commonly executed.
480 -- As such, these calls often preserve all registers so that the call does
481 -- not break any live ranges in the caller side. This calling convention
482 -- does not support varargs and requires the prototype of all callees to
483 -- exactly match the prototype of the function definition.
485 -- | Any calling convention may be specified by number, allowing
486 -- target-specific calling conventions to be used. Target specific calling
487 -- conventions start at 64.
489 -- | X86 Specific 'StdCall' convention. LLVM includes a specific alias for it
490 -- rather than just using CC_Ncc.
494 instance Show LlvmCallConvention where
496 show CC_Fastcc = "fastcc"
497 show CC_Coldcc = "coldcc"
498 show (CC_Ncc i) = "cc " ++ show i
499 show CC_X86_Stdcc = "x86_stdcallcc"
502 -- | Functions can have a fixed amount of parameters, or a variable amount.
503 data LlvmParameterListType
504 -- Fixed amount of arguments.
506 -- Variable amount of arguments.
511 -- | Linkage type of a symbol.
513 -- The description of the constructors is copied from the Llvm Assembly Language
514 -- Reference Manual <http://www.llvm.org/docs/LangRef.html#linkage>, because
515 -- they correspond to the Llvm linkage types.
517 -- | Global values with internal linkage are only directly accessible by
518 -- objects in the current module. In particular, linking code into a module
519 -- with an internal global value may cause the internal to be renamed as
520 -- necessary to avoid collisions. Because the symbol is internal to the
521 -- module, all references can be updated. This corresponds to the notion
522 -- of the @static@ keyword in C.
524 -- | Globals with @linkonce@ linkage are merged with other globals of the
525 -- same name when linkage occurs. This is typically used to implement
526 -- inline functions, templates, or other code which must be generated
527 -- in each translation unit that uses it. Unreferenced linkonce globals are
528 -- allowed to be discarded.
530 -- | @weak@ linkage is exactly the same as linkonce linkage, except that
531 -- unreferenced weak globals may not be discarded. This is used for globals
532 -- that may be emitted in multiple translation units, but that are not
533 -- guaranteed to be emitted into every translation unit that uses them. One
534 -- example of this are common globals in C, such as @int X;@ at global
537 -- | @appending@ linkage may only be applied to global variables of pointer
538 -- to array type. When two global variables with appending linkage are
539 -- linked together, the two global arrays are appended together. This is
540 -- the Llvm, typesafe, equivalent of having the system linker append
541 -- together @sections@ with identical names when .o files are linked.
543 -- | The semantics of this linkage follow the ELF model: the symbol is weak
544 -- until linked, if not linked, the symbol becomes null instead of being an
545 -- undefined reference.
547 -- | The symbol participates in linkage and can be used to resolve external
548 -- symbol references.
550 -- | Alias for 'ExternallyVisible' but with explicit textual form in LLVM
555 instance Show LlvmLinkageType where
556 show Internal = "internal"
557 show LinkOnce = "linkonce"
559 show Appending = "appending"
560 show ExternWeak = "extern_weak"
561 -- ExternallyVisible does not have a textual representation, it is
562 -- the linkage type a function resolves to if no other is specified
564 show ExternallyVisible = ""
565 show External = "external"
568 -- -----------------------------------------------------------------------------
572 -- | Llvm binary operators machine operations.
574 = LM_MO_Add -- ^ add two integer, floating point or vector values.
575 | LM_MO_Sub -- ^ subtract two ...
576 | LM_MO_Mul -- ^ multiply ..
577 | LM_MO_UDiv -- ^ unsigned integer or vector division.
578 | LM_MO_SDiv -- ^ signed integer ..
579 | LM_MO_FDiv -- ^ floating point ..
580 | LM_MO_URem -- ^ unsigned integer or vector remainder (mod)
581 | LM_MO_SRem -- ^ signed ...
582 | LM_MO_FRem -- ^ floating point ...
586 -- | Logical shift right
587 -- Shift right, filling with zero
589 -- | Arithmetic shift right
590 -- The most significant bits of the result will be equal to the sign bit of
594 | LM_MO_And -- ^ AND bitwise logical operation.
595 | LM_MO_Or -- ^ OR bitwise logical operation.
596 | LM_MO_Xor -- ^ XOR bitwise logical operation.
599 instance Show LlvmMachOp where
600 show LM_MO_Add = "add"
601 show LM_MO_Sub = "sub"
602 show LM_MO_Mul = "mul"
603 show LM_MO_UDiv = "udiv"
604 show LM_MO_SDiv = "sdiv"
605 show LM_MO_FDiv = "fdiv"
606 show LM_MO_URem = "urem"
607 show LM_MO_SRem = "srem"
608 show LM_MO_FRem = "frem"
609 show LM_MO_Shl = "shl"
610 show LM_MO_LShr = "lshr"
611 show LM_MO_AShr = "ashr"
612 show LM_MO_And = "and"
614 show LM_MO_Xor = "xor"
617 -- | Llvm compare operations.
619 = LM_CMP_Eq -- ^ Equal (Signed and Unsigned)
620 | LM_CMP_Ne -- ^ Not equal (Signed and Unsigned)
621 | LM_CMP_Ugt -- ^ Unsigned greater than
622 | LM_CMP_Uge -- ^ Unsigned greater than or equal
623 | LM_CMP_Ult -- ^ Unsigned less than
624 | LM_CMP_Ule -- ^ Unsigned less than or equal
625 | LM_CMP_Sgt -- ^ Signed greater than
626 | LM_CMP_Sge -- ^ Signed greater than or equal
627 | LM_CMP_Slt -- ^ Signed less than
628 | LM_CMP_Sle -- ^ Signed less than or equal
630 -- Float comparisons. GHC uses a mix of ordered and unordered float
632 | LM_CMP_Feq -- ^ Float equal
633 | LM_CMP_Fne -- ^ Float not equal
634 | LM_CMP_Fgt -- ^ Float greater than
635 | LM_CMP_Fge -- ^ Float greater than or equal
636 | LM_CMP_Flt -- ^ Float less than
637 | LM_CMP_Fle -- ^ Float less than or equal
640 instance Show LlvmCmpOp where
641 show LM_CMP_Eq = "eq"
642 show LM_CMP_Ne = "ne"
643 show LM_CMP_Ugt = "ugt"
644 show LM_CMP_Uge = "uge"
645 show LM_CMP_Ult = "ult"
646 show LM_CMP_Ule = "ule"
647 show LM_CMP_Sgt = "sgt"
648 show LM_CMP_Sge = "sge"
649 show LM_CMP_Slt = "slt"
650 show LM_CMP_Sle = "sle"
651 show LM_CMP_Feq = "oeq"
652 show LM_CMP_Fne = "une"
653 show LM_CMP_Fgt = "ogt"
654 show LM_CMP_Fge = "oge"
655 show LM_CMP_Flt = "olt"
656 show LM_CMP_Fle = "ole"
659 -- | Llvm cast operations.
661 = LM_Trunc -- ^ Integer truncate
662 | LM_Zext -- ^ Integer extend (zero fill)
663 | LM_Sext -- ^ Integer extend (sign fill)
664 | LM_Fptrunc -- ^ Float truncate
665 | LM_Fpext -- ^ Float extend
666 | LM_Fptoui -- ^ Float to unsigned Integer
667 | LM_Fptosi -- ^ Float to signed Integer
668 | LM_Uitofp -- ^ Unsigned Integer to Float
669 | LM_Sitofp -- ^ Signed Int to Float
670 | LM_Ptrtoint -- ^ Pointer to Integer
671 | LM_Inttoptr -- ^ Integer to Pointer
672 | LM_Bitcast -- ^ Cast between types where no bit manipulation is needed
675 instance Show LlvmCastOp where
676 show LM_Trunc = "trunc"
677 show LM_Zext = "zext"
678 show LM_Sext = "sext"
679 show LM_Fptrunc = "fptrunc"
680 show LM_Fpext = "fpext"
681 show LM_Fptoui = "fptoui"
682 show LM_Fptosi = "fptosi"
683 show LM_Uitofp = "uitofp"
684 show LM_Sitofp = "sitofp"
685 show LM_Ptrtoint = "ptrtoint"
686 show LM_Inttoptr = "inttoptr"
687 show LM_Bitcast = "bitcast"
690 -- -----------------------------------------------------------------------------
691 -- * Floating point conversion
694 -- | Convert a Haskell Double to an LLVM hex encoded floating point form. In
695 -- Llvm float literals can be printed in a big-endian hexadecimal format,
696 -- regardless of underlying architecture.
697 dToStr :: Double -> String
699 = let bs = doubleToBytes d
700 hex d' = case showHex d' "" of
701 [] -> error "dToStr: too few hex digits for float"
704 _ -> error "dToStr: too many hex digits for float"
706 str = map toUpper $ concat . fixEndian . (map hex) $ bs
709 -- | Reverse or leave byte data alone to fix endianness on this target.
710 fixEndian :: [a] -> [a]
711 #ifdef WORDS_BIGENDIAN