[Issue 6829] Unsigned rotate standard function in Phobos

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6829



--- Comment #37 from Iain Buclaw <ibuclaw at ubuntu.com> 2013-07-14 08:38:50 PDT ---
(In reply to comment #36)
> (In reply to comment #35)
> > Interestingly, translating the code into C and compiling with gcc 4.8.1 does
> > produce the rotate instructions. But compiling the D version with gdc 4.8
> > doesn't. I've no idea why.
> 
> You can look at output of -fdump-tree-gimple and compare gcc to gdc generated
> code.
> 
> But there should be no difference. :)

gdc 4.9.0 20130707 - produces rol/ror instructions.
gdc 4.9.0 20130616 - produces rol/ror instructions.
gdc 4.9.0 20130505 - produces shl/shr instructions.


Related commits between 10/05 - 14/05.

http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=198770
http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=198823
http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=198864

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