LLVM: Add alias type defenitions to LlvmModule.

[ghc-hetmet.git] / compiler / llvmGen / Llvm / Types.hs

diff --git a/compiler/llvmGen/Llvm/Types.hs b/compiler/llvmGen/Llvm/Types.hs
index 0a39d38..0a4fff2 100644 (file)
--- a/compiler/llvmGen/Llvm/Types.hs
+++ b/compiler/llvmGen/Llvm/Types.hs
@@ -22,24 +22,26 @@ import PprBase
 --
 
 -- | A global mutable variable. Maybe defined or external
-type LMGlobal   = (LlvmVar, Maybe LlvmStatic)
+type LMGlobal = (LlvmVar, Maybe LlvmStatic)
 -- | A String in LLVM
-type LMString   = FastString
+type LMString = FastString
 
+-- | A type alias
+type LlvmAlias = (LMString, LlvmType)
 
--- | Llvm Types.
+-- | Llvm Types
 data LlvmType
-  = LMInt Int                 -- ^ An integer with a given width in bits.
-  | LMFloat                   -- ^ 32 bit floating point
-  | LMDouble                  -- ^ 64 bit floating point
-  | LMFloat80                 -- ^ 80 bit (x86 only) floating point
-  | LMFloat128                -- ^ 128 bit floating point
-  | LMPointer LlvmType        -- ^ A pointer to a 'LlvmType'
-  | LMArray Int LlvmType      -- ^ An array of 'LlvmType'
-  | LMLabel                   -- ^ A 'LlvmVar' can represent a label (address)
-  | LMVoid                    -- ^ Void type
-  | LMStruct [LlvmType]       -- ^ Structure type
-  | LMAlias LMString LlvmType -- ^ A type alias
+  = LMInt Int            -- ^ An integer with a given width in bits.
+  | LMFloat              -- ^ 32 bit floating point
+  | LMDouble             -- ^ 64 bit floating point
+  | LMFloat80            -- ^ 80 bit (x86 only) floating point
+  | LMFloat128           -- ^ 128 bit floating point
+  | LMPointer LlvmType   -- ^ A pointer to a 'LlvmType'
+  | LMArray Int LlvmType -- ^ An array of 'LlvmType'
+  | LMLabel              -- ^ A 'LlvmVar' can represent a label (address)
+  | LMVoid               -- ^ Void type
+  | LMStruct [LlvmType]  -- ^ Structure type
+  | LMAlias LlvmAlias    -- ^ A type alias
 
   -- | Function type, used to create pointers to functions
   | LMFunction LlvmFunctionDecl
@@ -66,7 +68,7 @@ instance Show LlvmType where
                         _otherwise                -> ""
       in show r ++ " (" ++ args ++ varg' ++ ")"
 
-  show (LMAlias s _   ) = "%" ++ unpackFS s
+  show (LMAlias (s,_)) = "%" ++ unpackFS s
 
 -- | An LLVM section defenition. If Nothing then let LLVM decide the section
 type LMSection = Maybe LMString
@@ -318,7 +320,7 @@ llvmWidthInBits LMLabel         = 0
 llvmWidthInBits LMVoid          = 0
 llvmWidthInBits (LMStruct tys)  = sum $ map llvmWidthInBits tys
 llvmWidthInBits (LMFunction  _) = 0
-llvmWidthInBits (LMAlias _ t)   = llvmWidthInBits t
+llvmWidthInBits (LMAlias (_,t)) = llvmWidthInBits t
 
 
 -- -----------------------------------------------------------------------------