[commit: ghc] master: Comments only (9c3e55b)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/9c3e55bd029447d9c2cac1c9ca1607a8a803cd79/ghc

>---------------------------------------------------------------

commit 9c3e55bd029447d9c2cac1c9ca1607a8a803cd79
Author: Simon Peyton Jones <simonpj at microsoft.com>
Date:   Mon May 23 16:27:08 2016 +0100

    Comments only


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9c3e55bd029447d9c2cac1c9ca1607a8a803cd79
 compiler/simplStg/UnariseStg.hs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler/simplStg/UnariseStg.hs b/compiler/simplStg/UnariseStg.hs
index c2d73a5..4c8a665 100644
--- a/compiler/simplStg/UnariseStg.hs
+++ b/compiler/simplStg/UnariseStg.hs
@@ -12,7 +12,8 @@ f (x :: (# Int, Bool #)) = f x + f (# 1, True #)
 f (x1 :: Int) (x2 :: Bool) = f x1 x2 + f 1 True
 
 It is important that we do this at the STG level and NOT at the core level
-because it would be very hard to make this pass Core-type-preserving.
+because it would be very hard to make this pass Core-type-preserving. In
+this example the type of 'f' changes, for example.
 
 STG fed to the code generators *must* be unarised because the code generators do
 not support unboxed tuple binders natively.