MaxXing issues

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                                            MaxXing

8335536: Fix assertion failure in IdealGraphPrinter when append is true

Hi all, This pull request contains a backport of commit [6db4c6a7](https://github.com/openjdk/jdk/commit/6db4c6a772df856fc3099c32a5b2c102a30d360c) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository. The commit being backported was authored by Qizheng Xing on 3 Jul 2024 and was...

ready

rfr

backport

[TODO] Remove attributes for compatibility once `compiler-dev` supports a higher version of Rust compiler

When we rebuild `compiler-dev` Docker image with a newer version of Rust compiler, remove attributes for compatibility like `#[allow(clippy::missing_const_for_thread_local)]` and rewrite related code with modern Rust features (like inline-const) as...

[TODO] Support opaque pointers in LLVM IR generator

Currently, `LlvmGenerator` will generate LLVM IRs with typed pointers, which will be accepted by `llc-21` or other tools in the LLVM 21 toolchain, due to the existence of the [opaque...