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A comment on TruffleC: A C implementation on top of JVM (2014). Parent comment

Re:TruffleC: A C implementation on top of JVM (2014) by dzaima on Friday August 12, 2022 @06:20AM (#32436495)
the JVM bytecode does not have any memory address type. Just various width integers & floats, and references to managed heap objects. Arbitrary pointers would have to be done with 'long's one way or another.
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Re:TruffleC: A C implementation on top of JVM (2014) by rschatz on Friday August 12, 2022 @06:27AM (#32436540)
You can still use pointers. It's a bit hidden, but there are things like `Unsafe.allocateMemory`, `Unsafe.getByte` and so on ;)
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Re:TruffleC: A C implementation on top of JVM (2014) by dzaima on Friday August 12, 2022 @06:32AM (#32436575)
right; at which point the subset of jvm you're using is a subset of any other IR/VM, the 'j' in 'jvm' being only useful as an implementation/runtime.
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Re:TruffleC: A C implementation on top of JVM (2014) by chaosite on Friday August 12, 2022 @07:25AM (#32436880)
Sure, but don't discount all of the JIT optimizations that were implemented in the JVM and the huge number of engineer years invested in that particular implementation/runtime...
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