RFR: 8293774: Improve TraceOptoParse to dump the bytecode name

[Jie Fu]

Hi all,

Please review this one-line patch which prints the bytecode name for `TraceOptoParse`.

While I was debugging with `TraceOptoParse`, I found it only prints the bci without the bytecode name.
I had to map the bci to the bytecode manually again and again.
It would be better to also dump the bytecode name.

Before:

    568  503       4       jdk.internal.org.objectweb.asm.ByteVector::putUTF8 (144 bytes)
Merging state at block #0 bci:0 with empty state on path 1
Parsing block #0 at bci [0,11), successors:  1 2
 @ bci:0
 @ bci:1
Uncommon trap reason='null_check' action='maybe_recompile' debug_id='0' at bci:1
Merging state at block #0 bci:0 with empty state on path 1
Parsing block #0 at bci [0,11), successors:
 @ bci:0
 @ bci:1
 @ bci:4
Uncommon trap reason='null_check' action='maybe_recompile' debug_id='0' at bci:4
 @ bci:5
 @ bci:6
Merging state at block #0 bci:0 with empty state on path 1


After:

    571  507       4       jdk.internal.org.objectweb.asm.ByteVector::putUTF8 (144 bytes)
Merging state at block #0 bci:0 with empty state on path 1
Parsing block #0 at bci [0,11), successors:  1 2
 @ bci:0 aload_1
 @ bci:1 invokevirtual
Uncommon trap reason='null_check' action='maybe_recompile' debug_id='0' at bci:1
Merging state at block #0 bci:0 with empty state on path 1
Parsing block #0 at bci [0,11), successors:
 @ bci:0 aload_0
 @ bci:1 getfield
 @ bci:4 arraylength
Uncommon trap reason='null_check' action='maybe_recompile' debug_id='0' at bci:4
 @ bci:5 aload_0
 @ bci:6 invokevirtual
Merging state at block #0 bci:0 with empty state on path 1


Testing:
 - tier1~3 on Linux/x64 in progress, seems fine until now

Thanks.
Best regards,
Jie

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

Commit messages:
 - 8293774: Improve TraceOptoParse to dump the bytecode name

Changes: https://git.openjdk.org/jdk/pull/10262/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10262&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293774
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/10262.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10262/head:pull/10262

PR: https://git.openjdk.org/jdk/pull/10262