Chuck Zhao
2010-Oct-08 00:41 UTC
[LLVMdev] how to write a local Pass Manager to control a few self-built passes
My LLVM project has reached a point that the complexity and inter-pass dependency often cause circular dependencies using opt tool. E.g. I have the following individual/dependent/independent passes over opt: -a: -b: -c: -ab -ac -bc ... I want to write a control pass (e.g., call it ABC pass) which can be used to precisely control the ordering of all my passes. When I say: opt xyz.so -abc < input.bc > output.bc It will actually create a pass manager, insert all individual passes, while precisely specifying the dependencies among them. This way, I can avoid the circular dependency dead lock. However, this (local) pass manager should still cooperate well with the rest of the LLVM system. Could someone point me to a code sample, a tutorial section or a file currently under LLVM 2.7/2.8 release? Thank you Chuck
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