RFR: [backport] 8202976: Add C1 lea patching support for x86

[Aleksey Shipilev]

On 11/25/20 9:39 PM, Roman Kennke wrote:
> This patch was actually missing the aarch64 parts. The original change
> did not have it either, it only came much later with the ZGC port to
> aarch64. I would like to add it here.
> 
> http://cr.openjdk.java.net/~rkennke/JDK-8202976-jdk8/webrev.01/

I believe we need to protect new blocks in c1_LIRAssembler_aarch64.cpp
with UseShenandoahGC?

Otherwise looks fine.

-- 
Thanks,
-Aleksey