[riscv-port-jdk17u:riscv-port] RFR: 8294366: RISC-V: Partially mark out incompressible regions

[Feilong Jiang]

On Mon, 27 Mar 2023 04:16:19 GMT, Xiaolin Zheng <xlinzheng at openjdk.org> wrote:

> One little difference: there is no `C2_MacroAssembler::emit_entry_barrier_stub` on JDK17.
> 
> Tested along with remaining patches, hotspot tier1~4 with fastdebug build.

src/hotspot/cpu/riscv/assembler_riscv.hpp line 2125:

> 2123: //         {
> 2124: //            CompressibleRegion cr(_masm);
> 2125: //            __ add(...); // this instruction will be compressed into 'c.and' when possible

Same issue here

-------------

PR Review Comment: https://git.openjdk.org/riscv-port-jdk17u/pull/28#discussion_r1150462435