[TIR][CodeGen] Define PackedFunc error code in MakePackedAPI - #15076
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Previously, the return value of a PackedFunc was hard-coded as the string `"return 0;"` in `CodeGenCHost`, which could cause compilation errors for `PrimFunc` returning `DataType::Void()`. This PR removes this explicit return statement from `CodeGenCHost`, replacing it with `tir::ret(Integer(0))` in the `MakePackedAPI` and `MakeUnpackedAPI` transforms. This is related to apache#15073, which performs an analogous change for the function signature.
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This causes fewer unit tests to break, and has more readable TVMScript.
Lunderberg
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Previously, some operations in `tvm.tir.op` required the operand to already be a `PrimExpr`, and raised an error if the operand was instead a python object. This could cause failures round-trip through TVMScript, as int32 and float32 types are printed as literals in TVMScript, relying on automatic conversion to convert them back into `PrimExpr` objects. For example, `T.expr2(T.int32(0))` is printed as `T.expr2(0)`, which then passes the python object `0` into `tvm.tir.op.expr2` when parsing the TVMScript. This commit updates the operations in `tvm.tir.op` to convert operands prior to accessing `operand.dtype`, avoiding the error and allowing these expressions to round-trip. This issue was first noticed in apache#15076 for `T.ret(0)`, but applied to any operator that used the operand's dtype without first normalizing to `PrimExpr`.
csullivan
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Jun 15, 2023
csullivan
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Jun 15, 2023
Previously, some operations in `tvm.tir.op` required the operand to already be a `PrimExpr`, and raised an error if the operand was instead a python object. This could cause failures round-trip through TVMScript, as int32 and float32 types are printed as literals in TVMScript, relying on automatic conversion to convert them back into `PrimExpr` objects. For example, `T.expr2(T.int32(0))` is printed as `T.expr2(0)`, which then passes the python object `0` into `tvm.tir.op.expr2` when parsing the TVMScript. This commit updates the operations in `tvm.tir.op` to convert operands prior to accessing `operand.dtype`, avoiding the error and allowing these expressions to round-trip. This issue was first noticed in #15076 for `T.ret(0)`, but applied to any operator that used the operand's dtype without first normalizing to `PrimExpr`.
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Previously, the return value of a PackedFunc was hard-coded as the string
"return 0;"inCodeGenCHost, which could cause compilation errors forPrimFuncreturningDataType::Void(). This PR removes this explicit return statement fromCodeGenCHost, replacing it withtir::ret(Integer(0))in theMakePackedAPIandMakeUnpackedAPItransforms.This is related to #15073, which performs an analogous change for the function signature.