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Emit compact IL code for unsigned 64-bit constants #8692

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Mar 11, 2020
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Emit compact IL code for unsigned 64-bit constants #8692

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19 changes: 11 additions & 8 deletions src/fsharp/IlxGen.fs
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Original file line number Diff line number Diff line change
Expand Up @@ -2440,24 +2440,27 @@ and GenConstant cenv cgbuf eenv (c, m, ty) sequel =
| Some e ->
GenExpr cenv cgbuf eenv SPSuppress e Continue
| None ->
match c with
| Const.Bool b -> CG.EmitInstr cgbuf (pop 0) (Push [g.ilg.typ_Bool]) (mkLdcInt32 (if b then 1 else 0))
| Const.SByte i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 (int32 i))
| Const.Int16 i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 (int32 i))
| Const.Int32 i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 i)
| Const.Int64 i ->
// see https://github.com/Microsoft/visualfsharp/pull/3620
let emitInt64Constant i =
// see https://github.com/dotnet/fsharp/pull/3620
// and https://github.com/dotnet/fsharp/issue/8683
// and https://github.com/dotnet/roslyn/blob/98f12bb/src/Compilers/Core/Portable/CodeGen/ILBuilderEmit.cs#L679
if i >= int64 System.Int32.MinValue && i <= int64 System.Int32.MaxValue then
CG.EmitInstrs cgbuf (pop 0) (Push [ilTy]) [ mkLdcInt32 (int32 i); AI_conv DT_I8 ]
elif i >= int64 System.UInt32.MinValue && i <= int64 System.UInt32.MaxValue then
CG.EmitInstrs cgbuf (pop 0) (Push [ilTy]) [ mkLdcInt32 (int32 i); AI_conv DT_U8 ]
else
CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (iLdcInt64 i)
match c with
| Const.Bool b -> CG.EmitInstr cgbuf (pop 0) (Push [g.ilg.typ_Bool]) (mkLdcInt32 (if b then 1 else 0))
| Const.SByte i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 (int32 i))
| Const.Int16 i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 (int32 i))
| Const.Int32 i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 i)
| Const.Int64 i -> emitInt64Constant i
| Const.IntPtr i -> CG.EmitInstrs cgbuf (pop 0) (Push [ilTy]) [iLdcInt64 i; AI_conv DT_I ]
| Const.Byte i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 (int32 i))
| Const.UInt16 i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 (int32 i))
| Const.UInt32 i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (mkLdcInt32 (int32 i))
| Const.UInt64 i -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (iLdcInt64 (int64 i))
| Const.UInt64 i -> emitInt64Constant (int64 i)
| Const.UIntPtr i -> CG.EmitInstrs cgbuf (pop 0) (Push [ilTy]) [iLdcInt64 (int64 i); AI_conv DT_U ]
| Const.Double f -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (AI_ldc (DT_R8, ILConst.R8 f))
| Const.Single f -> CG.EmitInstr cgbuf (pop 0) (Push [ilTy]) (AI_ldc (DT_R4, ILConst.R4 f))
Expand Down