RFR: JDK-8238851: Shenandoah: C1: Resolve into registers of correct type
rkennke at redhat.com
Tue Feb 11 19:09:58 UTC 2020
>> In ShBSC1::ensure_in_register() we are blindly creating registers of
>> type T_OBJECT, even though in some cases we actually need T_ADDRESS.
>> This blows up when we verify oop registers: when the argument is of type
>> T_OBJECT we perform extra checks that fail when the value in register is
>> not actually an object.
>> Testing: the provided testcase passes now. hotspot_gc_shenandoah
> This path probably needs adjustment too:
> 167 #ifdef AARCH64
> 168 // AArch64 expects double-size register.
> 169 obj_reg = gen->new_pointer_register();
> 170 #else
The provided test passes on aarch64 without any additional changes.
I tried removing the block, hoping that the suggested change does
perhaps make it unnecessary, but no. It's still needed.
Further suggestions welcome. This whole thing kinda smells.
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