module SPARC.ShortcutJump (
- JumpDest(..),
+ JumpDest(..), getJumpDestBlockId,
canShortcut,
shortcutJump,
shortcutStatic,
import CLabel
import BlockId
-import Cmm
+import OldCmm
import Panic
+import Unique
= DestBlockId BlockId
| DestImm Imm
+getJumpDestBlockId :: JumpDest -> Maybe BlockId
+getJumpDestBlockId (DestBlockId bid) = Just bid
+getJumpDestBlockId _ = Nothing
+
canShortcut :: Instr -> Maybe JumpDest
canShortcut _ = Nothing
shortcutStatic fn (CmmStaticLit (CmmLabel lab))
| Just uq <- maybeAsmTemp lab
- = CmmStaticLit (CmmLabel (shortBlockId fn (BlockId uq)))
+ = CmmStaticLit (CmmLabel (shortBlockId fn (mkBlockId uq)))
shortcutStatic fn (CmmStaticLit (CmmLabelDiffOff lbl1 lbl2 off))
| Just uq <- maybeAsmTemp lbl1
- = CmmStaticLit (CmmLabelDiffOff (shortBlockId fn (BlockId uq)) lbl2 off)
+ = CmmStaticLit (CmmLabelDiffOff (shortBlockId fn (mkBlockId uq)) lbl2 off)
-- slightly dodgy, we're ignoring the second label, but this
-- works with the way we use CmmLabelDiffOff for jump tables now.
shortBlockId :: (BlockId -> Maybe JumpDest) -> BlockId -> CLabel
-shortBlockId fn blockid@(BlockId uq) =
+shortBlockId fn blockid =
case fn blockid of
- Nothing -> mkAsmTempLabel uq
+ Nothing -> mkAsmTempLabel (getUnique blockid)
Just (DestBlockId blockid') -> shortBlockId fn blockid'
Just (DestImm (ImmCLbl lbl)) -> lbl
_other -> panic "shortBlockId"