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2013 Apr 18
0
[LLVMdev] Traditional Dataflow Algorithm
Andrew Trick <atrick at apple.com> writes:
> David was asking for a post-register-rewrite analysis, which I think
> is a totally different problem and best implemented separately by each
> target. The target knows best which register units are overwritten or
> preserved by an operation. We try to fake it with
> undef/implicit-use/implicit-def, but it isn't reliable.
2013 Apr 18
2
[LLVMdev] Traditional Dataflow Algorithm
On Apr 16, 2013, at 10:27 AM, John Criswell <criswell at illinois.edu> wrote:
> On 4/16/13 11:30 AM, dag at cray.com wrote:
>> Is there a traditional dataflow algorithm buried in LLVM somewhere? I
>> need to be able to do some very late transformations (after regalloc)
>> and we aren't in SSA anymore. I will need a dataflow analysis to ensure
>> correctness.