diff options
Diffstat (limited to 'compiler/GHC/CmmToLlvm/Data.hs')
| -rw-r--r-- | compiler/GHC/CmmToLlvm/Data.hs | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/compiler/GHC/CmmToLlvm/Data.hs b/compiler/GHC/CmmToLlvm/Data.hs index 0e5679887d..edab12a6ef 100644 --- a/compiler/GHC/CmmToLlvm/Data.hs +++ b/compiler/GHC/CmmToLlvm/Data.hs @@ -15,6 +15,7 @@ import GHC.CmmToLlvm.Config import GHC.Cmm.BlockId import GHC.Cmm.CLabel +import GHC.Cmm.InitFini import GHC.Cmm import GHC.Platform @@ -65,6 +66,14 @@ genLlvmData (_, CmmStaticsRaw alias [CmmStaticLit (CmmLabel lbl), CmmStaticLit i pure ([LMGlobal aliasDef $ Just orig], [tyAlias]) +-- See Note [Initializers and finalizers in Cmm] in GHC.Cmm.InitFini. +genLlvmData (sect, statics) + | Just (initOrFini, clbls) <- isInitOrFiniArray (CmmData sect statics) + = let var = case initOrFini of + IsInitArray -> fsLit "llvm.global_ctors" + IsFiniArray -> fsLit "llvm.global_dtors" + in genGlobalLabelArray var clbls + genLlvmData (sec, CmmStaticsRaw lbl xs) = do label <- strCLabel_llvm lbl static <- mapM genData xs @@ -88,6 +97,37 @@ genLlvmData (sec, CmmStaticsRaw lbl xs) = do return ([globDef], [tyAlias]) +-- | Produce an initializer or finalizer array declaration. +-- See Note [Initializers and finalizers in Cmm] in GHC.Cmm.InitFini for +-- details. +genGlobalLabelArray :: FastString -> [CLabel] -> LlvmM LlvmData +genGlobalLabelArray var_nm clbls = do + lbls <- mapM strCLabel_llvm clbls + decls <- mapM mkFunDecl lbls + let entries = map toArrayEntry lbls + static = LMStaticArray entries arr_ty + arr = LMGlobal arr_var (Just static) + return ([arr], decls) + where + mkFunDecl :: LMString -> LlvmM LlvmType + mkFunDecl fn_lbl = do + let fn_ty = mkFunTy fn_lbl + funInsert fn_lbl fn_ty + return (fn_ty) + + toArrayEntry :: LMString -> LlvmStatic + toArrayEntry fn_lbl = + let fn_var = LMGlobalVar fn_lbl (LMPointer $ mkFunTy fn_lbl) Internal Nothing Nothing Global + fn = LMStaticPointer fn_var + null = LMStaticLit (LMNullLit i8Ptr) + prio = LMStaticLit $ LMIntLit 0xffff i32 + in LMStaticStrucU [prio, fn, null] entry_ty + + arr_var = LMGlobalVar var_nm arr_ty Internal Nothing Nothing Global + mkFunTy lbl = LMFunction $ LlvmFunctionDecl lbl ExternallyVisible CC_Ccc LMVoid FixedArgs [] Nothing + entry_ty = LMStructU [i32, LMPointer $ mkFunTy $ fsLit "placeholder", LMPointer i8] + arr_ty = LMArray (length clbls) entry_ty + -- | Format the section type part of a Cmm Section llvmSectionType :: Platform -> SectionType -> FastString llvmSectionType p t = case t of @@ -106,7 +146,10 @@ llvmSectionType p t = case t of CString -> case platformOS p of OSMinGW32 -> fsLit ".rdata$str" _ -> fsLit ".rodata.str" - (OtherSection _) -> panic "llvmSectionType: unknown section type" + + InitArray -> panic "llvmSectionType: InitArray" + FiniArray -> panic "llvmSectionType: FiniArray" + OtherSection _ -> panic "llvmSectionType: unknown section type" -- | Format a Cmm Section into a LLVM section name llvmSection :: Section -> LlvmM LMSection |