On 20/04/2011 18:28, Ian Lynagh wrote:
On Wed, Apr 20, 2011 at 05:02:50PM +0200, Daniel Fischer wrote:
So, is it possible that some change in ghc-7.0.3 vs. the previous versions
Very little changed between 7.0.2 and 7.0.3. The only thing that jumps out to me as possibly being relevant is:
diff -ur 7.0.2/ghc-7.0.2/compiler/nativeGen/X86/Instr.hs 7.0.3/ghc-7.0.3/compiler/nativeGen/X86/Instr.hs --- 7.0.2/ghc-7.0.2/compiler/nativeGen/X86/Instr.hs 2011-02-28 18:10:06.000000000 +0000 +++ 7.0.3/ghc-7.0.3/compiler/nativeGen/X86/Instr.hs 2011-03-26 18:10:04.000000000 +0000 @@ -734,6 +734,7 @@ where p insn r = case insn of CALL _ _ -> GFREE : insn : r JMP _ -> GFREE : insn : r + JXX_GBL _ _ -> GFREE : insn : r _ -> insn : r
Right, it could be related to this. However this change was made to eliminate some causes of NaNs, see: http://hackage.haskell.org/trac/ghc/ticket/4914 So I'm very depressed if it managed to introduce NaNs somehow. Could someone make a ticket for this, with the smallest test case found so far please? Cheers, Simon