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cernan
2012 Oct 08
1
[LLVMdev] SCEV bottom value
Hi Preston,
I was wondering ... "Bottom" is a bit overloaded as far as terms go. Would SCEVNaN be a better name for this beast?
Sameer.
> -----Original Message-----
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
> Behalf Of Sameer Sahasrabuddhe
> Sent: Monday, October 08, 2012 9:16 AM
> To: preston.briggs at gmail.com
> Cc: LLVM Develope...
2012 Oct 08
0
[LLVMdev] SCEV bottom value
On Sun, 7 Oct 2012 18:53:59 -0700
Preston Briggs <preston.briggs at gmail.com> wrote:
> I'd like a value, call it Bottom, such that
>
> SE->getAddExpr(Bottom, X) => Bottom
> SE->getMulExpr(Bottom, X,) => Bottom
> isKnownPredicate(any, Bottom, X) => false
> etc.
>
>
> I can write code to make NULL work like I want, but it would be
> simpler
2012 Oct 08
3
[LLVMdev] SCEV bottom value
I'd like a value, call it Bottom, such that
SE->getAddExpr(Bottom, X) => Bottom
SE->getMulExpr(Bottom, X,) => Bottom
isKnownPredicate(any, Bottom, X) => false
etc.
I can write code to make NULL work like I want, but it would be simpler if
something was already defined. I'm wondering about SCEV::Unknown. The
documentation suggests I could perhaps use it for a