[Relax] Update GlobalVar name in AttachGlobalSymbol #17202
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Prior to this commit, the `relax.transform.DeadCodeElimination` only considered calls from Relax to TIR when identifying unused functions. This would erroneously remove TIR functions that are called indirectly. This commit adds a new utility `tvm.ir.analysis.collect_call_map`, which can collect the call map of an `IRModule` across both Relax and TIR, using it in Relax's `DeadCodeElimination` transform.
Prior to this commit, the `relax.transform.AttachGlobalSymbol` pass could produce a PrimFunc whose `"global_symbol"` attribute does not match the name of the `GlobalVar`. As a result, the PackedFunc that is provided by the compiled module (defined by the `"global_symbol"`) does not match the PackedFunc that is required by the Relax VM (defined by the `GlobalVar` name). This commit updates `AttachGlobalSymbol` to replace the `GlobalVar` of any function whose `"global_symbol"` is updated. Closes apache#17176
This was referenced Jul 26, 2024
tqchen
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Lunderberg
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This is a follow-up PR to apache#17202, which added a general utility to replace `GlobalVar` instances across all TVM IR types. This PR exposes this new utility through the Python API, and explicitly tests its functionality.
Lunderberg
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* [IR] Expose ReplaceGlobalVars utility in the Python API This is a follow-up PR to #17202, which added a general utility to replace `GlobalVar` instances across all TVM IR types. This PR exposes this new utility through the Python API, and explicitly tests its functionality. * Lint fix
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Prior to this commit, the
relax.transform.AttachGlobalSymbolpass could produce a PrimFunc whose"global_symbol"attribute does not match the name of theGlobalVar. As a result, the PackedFunc that is provided by the compiled module (defined by the"global_symbol") does not match the PackedFunc that is required by the Relax VM (defined by theGlobalVarname).This commit updates
AttachGlobalSymbolto replace theGlobalVarof any function whose"global_symbol"is updated.Closes #17176