RFR: 8276563: Undefined Behaviour in class Assembler

[Jorn Vernee]

On Sun, 7 Nov 2021 06:59:25 GMT, Mai Đặng Quân Anh <duke at openjdk.java.net> wrote:

> The only odd thing was that when using a constant object know at the use site (case B), I would have expected an immediate, but the constant encoding gets loaded from the text segment instead.

Yeah... I found that the constructor has to be marked `constexpr` to make it work with GCC (as @merykitty also found). The value also gets emitted into `.rodata` in that case.

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PR: https://git.openjdk.java.net/jdk/pull/6280