MasterJH5574 opened a new pull request, #18221:
URL: https://github.com/apache/tvm/pull/18221
This PR fixes the JSON parser and writer for the support of the fast-math
flag.
Prior to this PR, there would be the following error when compiling TVM with
fast-math. This PR fixes this issue.
```
/home/ruihangl/Workspace/tvm/ffi/src/ffi/extra/json_writer.cc: In static
member function ‘static bool
tvm::ffi::json::JSONWriter::FastMathSafeIsNaN(double)’:
/home/ruihangl/Workspace/tvm/ffi/src/ffi/extra/json_writer.cc:69:22: error:
dereferencing type-punned pointer will break strict-aliasing rules
[-Werror=strict-aliasing]
69 | uint64_t bits = *reinterpret_cast<const uint64_t*>(&x);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/ruihangl/Workspace/tvm/ffi/src/ffi/extra/json_writer.cc: In static
member function ‘static bool
tvm::ffi::json::JSONWriter::FastMathSafeIsInf(double)’:
/home/ruihangl/Workspace/tvm/ffi/src/ffi/extra/json_writer.cc:84:22: error:
dereferencing type-punned pointer will break strict-aliasing rules
[-Werror=strict-aliasing]
84 | uint64_t bits = *reinterpret_cast<const uint64_t*>(&x);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
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