[llvm] [llvm] Improve llvm.objectsize computation by computing GEP, alloca and malloc parameters bound (PR #115522)

[David Spickett via llvm-commits]

DavidSpickett wrote:

The Fortran tests now work but `ExecutionEngine/Orc/./OrcJITTests/125/163` is definitely due to "[llvm] Use computeConstantRange to improve llvm.objectsize computation". It does not fail in stage 1 of the build.

If you don't see the same failure, I wouldn't be against relanding this and seeing if it fixes everything else. As long as there's a prompt revert if it does break on AArch64 again.

There's a good chance it'll fail like this elsewhere given that before we couldn't get to testing stage 2 at all.

https://github.com/llvm/llvm-project/pull/115522