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-- | Native code generator configuration
module GHC.CmmToAsm.Config
( NCGConfig(..)
, ncgWordWidth
, ncgSpillPreallocSize
, platformWordWidth
)
where
import GHC.Prelude
import GHC.Platform
import GHC.Cmm.Type (Width(..))
import GHC.CmmToAsm.CFG.Weight
import GHC.Unit.Module (Module)
import GHC.Utils.Outputable
-- | Native code generator configuration
data NCGConfig = NCGConfig
{ ncgPlatform :: !Platform -- ^ Target platform
, ncgAsmContext :: !SDocContext -- ^ Context for ASM code generation
, ncgThisModule :: !Module -- ^ The name of the module we are currently compiling
, ncgProcAlignment :: !(Maybe Int) -- ^ Mandatory proc alignment
, ncgExternalDynamicRefs :: !Bool -- ^ Generate code to link against dynamic libraries
, ncgPIC :: !Bool -- ^ Enable Position-Independent Code
, ncgInlineThresholdMemcpy :: !Word -- ^ If inlining `memcpy` produces less than this threshold (in pseudo-instruction unit), do it
, ncgInlineThresholdMemset :: !Word -- ^ Ditto for `memset`
, ncgSplitSections :: !Bool -- ^ Split sections
, ncgRegsIterative :: !Bool
, ncgAsmLinting :: !Bool -- ^ Perform ASM linting pass
, ncgDoConstantFolding :: !Bool -- ^ Perform CMM constant folding
, ncgSseVersion :: Maybe SseVersion -- ^ (x86) SSE instructions
, ncgBmiVersion :: Maybe BmiVersion -- ^ (x86) BMI instructions
, ncgDumpRegAllocStages :: !Bool
, ncgDumpAsmStats :: !Bool
, ncgDumpAsmConflicts :: !Bool
, ncgCfgWeights :: !Weights -- ^ CFG edge weights
, ncgCfgBlockLayout :: !Bool -- ^ Use CFG based block layout algorithm
, ncgCfgWeightlessLayout :: !Bool -- ^ Layout based on last instruction per block.
, ncgDwarfEnabled :: !Bool -- ^ Enable Dwarf generation
, ncgDwarfUnwindings :: !Bool -- ^ Enable unwindings
, ncgDwarfStripBlockInfo :: !Bool -- ^ Strip out block information from generated Dwarf
, ncgExposeInternalSymbols :: !Bool -- ^ Expose symbol table entries for internal symbols
}
-- | Return Word size
ncgWordWidth :: NCGConfig -> Width
ncgWordWidth config = platformWordWidth (ncgPlatform config)
-- | Size in bytes of the pre-allocated spill space on the C stack
ncgSpillPreallocSize :: NCGConfig -> Int
ncgSpillPreallocSize config = pc_RESERVED_C_STACK_BYTES (platformConstants (ncgPlatform config))
-- | Return Word size
platformWordWidth :: Platform -> Width
platformWordWidth platform = case platformWordSize platform of
PW4 -> W32
PW8 -> W64
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