Ubospica opened a new pull request, #14130:
URL: https://github.com/apache/tvm/pull/14130
Currently, if the same metadata object (e.g. a multi-line `tir.StringImm`)
is referenced for more than one times in an IRModule, each reference will have
different indices of the metadata array. For example, this code
```
str_imm = T.StringImm("aaa\nbbb\n")
@I.ir_module
class Module:
@T.prim_func
def foo() -> None:
A = str_imm
B = str_imm
@T.prim_func
def foo1() -> None:
A = str_imm
Module.show()
```
where `str_imm` is referenced three times, will generate such output:
```
@I.ir_module
class Module:
@T.prim_func
def foo():
A: T.handle = metadata["tir.StringImm"][0]
B: T.handle = metadata["tir.StringImm"][1]
T.evaluate(0)
@T.prim_func
def foo1():
A: T.handle = metadata["tir.StringImm"][2]
T.evaluate(0)
```
Each time has a different metadata index.
This PR fixes this problem by detecting duplicate item in
`IRDocsifierNode::AddMetadata`.
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