#7460: Double literals generated bad core
---------------------------------+------------------------------------------
Reporter: tibbe | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.4.2
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Runtime performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
---------------------------------+------------------------------------------
Comment(by igloo):
What's the regression exactly? In 7.0 I see
{{{
case GHC.Prim.>=# i#_a1x8 0 of _ {
GHC.Bool.False ->
case {__pkg_ccall_GC integer-gmp
integer_cmm_word2Integerzh GHC.Prim.Word#
-> (#
GHC.Prim.Int#, GHC.Prim.ByteArray# #)}_a1yc
x#_a16l
of _ { (# s1_a1y9, d_a1ya #) ->
case {__pkg_ccall integer-gmp integer_cbits_encodeDouble
GHC.Prim.Int#
-> GHC.Prim.ByteArray#
-> GHC.Prim.Int#
-> GHC.Prim.State#
GHC.Prim.RealWorld
-> (# GHC.Prim.State#
GHC.Prim.RealWorld,
GHC.Prim.Double#
#)}_a1yl
s1_a1y9 d_a1ya 0 GHC.Prim.realWorld#
}}}
as opposed to
{{{
case GHC.Prim.>=# i#_a1F4 0 of _ {
GHC.Types.False ->
case GHC.Integer.Type.doubleFromInteger
(GHC.Integer.Type.wordToInteger x#_a1iv)
}}}
in 7.4. Is that change what you are talking about, or are you looking at
something different?
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7460#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
Glasgow-haskell-bugs@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
