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View patterns, record wildcards, and record puns
[ghc-hetmet.git]
/
compiler
/
nativeGen
/
RegAllocLinear.hs
diff --git
a/compiler/nativeGen/RegAllocLinear.hs
b/compiler/nativeGen/RegAllocLinear.hs
index
debda83
..
888ef16
100644
(file)
--- a/
compiler/nativeGen/RegAllocLinear.hs
+++ b/
compiler/nativeGen/RegAllocLinear.hs
@@
-155,8
+155,9
@@
getFreeRegs :: RegClass -> FreeRegs -> [RegNo] -- lazilly
getFreeRegs cls (FreeRegs g f)
| RcDouble <- cls = go f (0x80000000) 63
| RcInteger <- cls = go g (0x80000000) 31
getFreeRegs cls (FreeRegs g f)
| RcDouble <- cls = go f (0x80000000) 63
| RcInteger <- cls = go g (0x80000000) 31
+ | otherwise = pprPanic "RegAllocLinear.getFreeRegs: Bad cls" (ppr cls)
where
where
- go x 0 i = []
+ go _ 0 _ = []
go x m i | x .&. m /= 0 = i : (go x (m `shiftR` 1) $! i-1)
| otherwise = go x (m `shiftR` 1) $! i-1
go x m i | x .&. m /= 0 = i : (go x (m `shiftR` 1) $! i-1)
| otherwise = go x (m `shiftR` 1) $! i-1