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35049
2006 May 10
0
[LLVMdev] SCCP
Nick Lewycky wrote:
> I tested it with "opt -sccp". I should've included a properly runnable
> example the first time. Sorry. At least, running "opt -load-vn -gcse"
> does not convert foo[0] into "102".
Further testing shows that the SCCP optimization will do handle it, and
so will the instruction combiner.
Chris Lattner wrote:
>>I'd suggest
2006 May 10
2
[LLVMdev] SCCP
Chris Lattner wrote:
> On Wed, 10 May 2006, Nick Lewycky wrote:
>
>>> Then just run the SCCP pass, and check to see if any operands satisfy
>>> the predicate "isa<UndefValue>(V)". LLVM explicitly represents
>>> undefined values.
>>
>>
>> I have a case where it doesn't, but perhaps the SCCP pass isn't to blame:
>>