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module PPC.RegInfo (
- JumpDest,
+ JumpDest( DestBlockId ), getJumpDestBlockId,
canShortcut,
shortcutJump,
import PPC.Instr
import BlockId
-import Cmm
+import OldCmm
import CLabel
import Outputable
+import Unique
data JumpDest = 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.
-> BlockId
-> CLabel
-shortBlockId fn blockid@(BlockId uq) =
+shortBlockId fn blockid =
case fn blockid of
Nothing -> mkAsmTempLabel uq
Just (DestBlockId blockid') -> shortBlockId fn blockid'
Just (DestImm (ImmCLbl lbl)) -> lbl
_other -> panic "shortBlockId"
+ where uq = getUnique blockid