RFR: JDK-8213199: GC abstraction for Assembler::needs_explicit_null_check()

Andrew Dinn adinn at redhat.com
Wed Nov 7 10:52:23 UTC 2018


On 06/11/18 22:00, Roman Kennke wrote:
> ... aaaaand it works on aarch64 too (with my little changes).

Ok, well that looks good to me.

The only other thing that might be worth doing is to add a comment in
uses_implicit_null_check to explain that in C2 compiled code a null
pointer can sometimes be represented by (and, hence, dereferenced at)
address heap_base depending on how the architecture chooses to define
Matcher::narrow_oop_use_complex_address()?

regards,


Andrew Dinn
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