Hi, This patch introduces `JitCompiler::isConstantExpression` which can be used to statically determine whether an expression has been constant-folded by the Jit compiler, leading to more constant-folding opportunities. For example, it can be used in `MemorySessionImpl::checkValidStateRaw` to eliminate the lifetime check on global sessions without imposing additional branches on other non-global sessions. This is inspired by `std::is_constant_evaluated` in C++.
Please kindly give your opinion as well as your reviews, thanks very much. ------------- Commit messages: - bug number - add isConstantExpression Changes: https://git.openjdk.org/jdk/pull/17527/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17527&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8324433 Stats: 162 lines in 6 files changed: 158 ins; 0 del; 4 mod Patch: https://git.openjdk.org/jdk/pull/17527.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/17527/head:pull/17527 PR: https://git.openjdk.org/jdk/pull/17527
