RFR: 8302369: Reduce the stack size of the C1 compiler [v2]

[SUN Guoyun]

> The current fact is that C1 uses more stack space than the C2 compiler, taking method `java.lang.Object::<init>`as an example on the x86_64 platform , the stack size used is 48 bytes for C1 compiler, while only 16 bytes is used for C2 compiler.
> 
> ========== C1-compiled nmethod =====
> 0x00007f93311cc747: push %rbp
> 0x00007f93311cc748: sub $0x30,%rsp // stack sizes is 48 bytes
> 
> 
> ========== C2-compiled nmethod =======
>     pushq rbp # Save rbp
>     subq rsp, #16 # Create frame //stack sizes is 16 bytes
> 
> After this patch, the C1 compiler will use less stack space. also taking method `java.lang.Object::<init>`as an example on the x86_64 platform , the stack size used is 16 bytes, which is the same as C2 compiler.
> 
> ========== C1-compiled nmethod =====
> 0x00007f80491ce647:   push   %rbp
> 0x00007f80491ce648:   sub    $0x10,%rsp   //stack sizes is 16 bytes

SUN Guoyun has updated the pull request incrementally with one additional commit since the last revision:

  8302369: Reduce the stack size of the C1 compiler

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12548/files
  - new: https://git.openjdk.org/jdk/pull/12548/files/814cbd49..4125dbb5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12548&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12548&range=00-01

  Stats: 198 lines in 14 files changed: 52 ins; 128 del; 18 mod
  Patch: https://git.openjdk.org/jdk/pull/12548.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12548/head:pull/12548

PR: https://git.openjdk.org/jdk/pull/12548