[LLVMbugs] [Bug 2697] apparent int64 bug

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2697


Chris Lattner <clattner at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




--- Comment #10 from Chris Lattner <clattner at apple.com>  2008-10-11 17:55:38 ---
Eli, you patch look great.  I applied it here after giggling it around to apply
to mainline:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20081006/068355.html


John, one very interesting experiment would be to exhaustively check whether we
do the right thing for code like this:

define i1 @x(i32 %x) nounwind {
        %div = sdiv i32 %x, 65536               ; <i32> [#uses=1]
        %cmp = icmp slt i32 %div, -65536
        ret i1 %cmp
}

where you could use i16 (instead of i32 to speed things up) and check for all
constants, all compares, and both sdiv and udiv.

-Chris


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