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Are there linters that will overlay compiler-tier optimization hints on top of handwritten assembly?

by _bxg1 7y ago

sesuximo 7y ago
This would be cool. I usually write up some C snippets and compare what different compilers do with what I have. The compiler explorer makes this really easy
monocasa 7y ago
Huh, yeah, that'd be neat. Specifically just ripping out the peephole optimizer from a backend just for matching would be a great start with a decent amount of value and not a god tier amount of work. That being said, you're not going to see the really crazy optimizations that compilers can do, because they need a bit of a higher level view of what you're trying to do.
emidln 7y ago
You could try to use one of the c language reversers to get c source code and then ask gcc/clang.
pandaman 7y ago
Don't know of anything that works on the source code level but static analysis in profilers does that for the object code (ones I use are proprietary but I imagine something like V-Tune does this as well).
CalChris 7y ago
The closest thing would be the Godbolt Compiler Explorer: https://godbolt.org/ https://godbolt.org/
- pjmlp 7y ago
  It is nice tool for online exploration, but not as V-Tune.
dbcurtis 7y ago
I have not looked at it in many years, but Intel's VTune tool was designed to help coders analyze and hand-tune code.
lizardmancan 7y ago
that would be neat for any language. A way to see what actually happens.
5- 7y ago
not precisely what you're asking, but there are two tools that annotate machine instructions with results from throughput and latency analysis, which helps with loop microoptimisation. the original from intel, iaca: https://software.intel.com/en-us/articles/intel-architecture-code-analyzer https://software.intel.com/en-us/articles/intel-architecture... newer clone, shipped with llvm: https://llvm.org/docs/CommandGuide/llvm-mca.html https://llvm.org/docs/CommandGuide/llvm-mca.html

Are there linters that will overlay compiler-tier optimization hints on top of handwritten assembly?

by _bxg1 7y ago

Are there linters that will overlay compiler-tier optimization hints on top of handwritten assembly?

This would be cool. I usually write up some C snippets and compare what different compilers do with what I have. The compiler explorer makes this really easy

monocasa 7y ago

Huh, yeah, that'd be neat. Specifically just ripping out the peephole optimizer from a backend just for matching would be a great start with a decent amount of value and not a god tier amount of work. That being said, you're not going to see the really crazy optimizations that compilers can do, because they need a bit of a higher level view of what you're trying to do.

emidln 7y ago

You could try to use one of the c language reversers to get c source code and then ask gcc/clang.

pandaman 7y ago

Don't know of anything that works on the source code level but static analysis in profilers does that for the object code (ones I use are proprietary but I imagine something like V-Tune does this as well).

CalChris 7y ago

The closest thing would be the Godbolt Compiler Explorer: https://godbolt.org/ https://godbolt.org/

pjmlp 7y ago
It is nice tool for online exploration, but not as V-Tune.

dbcurtis 7y ago

I have not looked at it in many years, but Intel's VTune tool was designed to help coders analyze and hand-tune code.

lizardmancan 7y ago

that would be neat for any language. A way to see what actually happens.

5- 7y ago

not precisely what you're asking, but there are two tools that annotate machine instructions with results from throughput and latency analysis, which helps with loop microoptimisation. the original from intel, iaca: https://software.intel.com/en-us/articles/intel-architecture-code-analyzer https://software.intel.com/en-us/articles/intel-architecture... newer clone, shipped with llvm: https://llvm.org/docs/CommandGuide/llvm-mca.html https://llvm.org/docs/CommandGuide/llvm-mca.html