[llvm] [ms] [llvm-ml] Allow PTR casting of registers to their own size (PR #132751)

[Eric Astor via llvm-commits]

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+; RUN: llvm-ml -m64 -filetype=s %s /Fo - | FileCheck %s
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ericastor wrote:

It does run through the object generation code path, but thanks for checking. (In fact, I confirmed that these tests fail without the X86AsmParser.cpp changes!)

https://github.com/llvm/llvm-project/pull/132751