Comments (2)
I think you'd want to be pretty careful with the parallelism strategy here since when Souper is used as an LLVM plugin you don't want to modify the IR concurrently.
we've not pursued anything like this since there are generally easier forms of parallelism available. when compiling, there's often a lot of parallelism at the level of the build system, for example. we also like to harvest LHSs into Souper's cache and then infer these in parallel, this works very well, the cache_infer program has support for this. there's also potential for parallelism in the enumerative synthesizer but we've not explored that at all seriously.
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Thank @regehr for the quick and always useful answer.
I agree about having a red light doing parallel IR modifications. I was thinking more about the enumerative synthesis and solver querying part as you mentioned. To create the proof of concept of CROW, we modified Souper here creating a forked process (to some extent using semaphore) for each candidate looking for valid replacements, it seems to work.
Sorry for the sloppy CPP code :)
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Related Issues (20)
- Dead links in the RESULTS file
- Souper crash in codegen from valid transformation HOT 5
- Assertion failed: (EB.get(&I)->hasOrigin(&I)), function ExtractExprCandidates, file .../lib/Extractor/Candidates.cpp, line 1025 HOT 6
- ICE: Assertion `false && "Phi with muliple arguments unimplemented"' failed HOT 1
- Instruction does not dominate all uses!
- Not deterministic SMT query string HOT 1
- Build failure HOT 1
- use error HOT 5
- LLVM Test Suite test failure with NO_INFER
- Build failure HOT 2
- futur m1 support ?
- Better spreading SMT solver load?
- [alive2] `IfNonPoison` removed upstream HOT 1
- Souper fails to turn multiplication by a power of two into a shift? HOT 3
- building for m1 HOT 2
- Packaging Souper HOT 1
- Possible bugs when generating inputs for dataflow pruning HOT 3
- Rgiht way to use souper HOT 2
- Hi, Is this superoptimizer hardware irrelvant? HOT 4
- Question about Souper IR's advantage compare to LLVM IR? HOT 1
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