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JRuby 9.1.6.0 example of massign (paralle assignment) optimized
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| jit.dumping=true | |
| jit.logging=true | |
| jit.logging.verbose=true | |
| jit.threshold=500 |
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| def foo(a, b, c) | |
| a, b, c = c, a, b | |
| a | |
| end | |
| (501+20000).times { foo(1, 2, 3) } | |
| __END__ | |
| foo is optimized by JRuby and HotSpot Server Compiler into equivalent of: | |
| def foo(a, b, c) | |
| c | |
| end |
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| $ ~/sdk/jruby-9.1.6.0/bin/jirb | |
| 2017-01-09T13:27:23.030-08:00: Ruby: compiled: ~/sdk/jruby-9.1.6.0/bin/jirb | |
| irb(main):001:0> def foo(a, b, c) | |
| irb(main):002:1> a, b, c = c, a, b | |
| irb(main):003:1> a | |
| irb(main):004:1> end | |
| => nil | |
| irb(main):005:0> (501+20000).times { foo(1, 2, 3) } | |
| // class version 51.0 (51) | |
| // access flags 0x21 | |
| public class rubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006 extends org/jruby/ast/executable/AbstractScript { | |
| // compiled from: (irb) | |
| // debug info: /private/tmp/test_jruby/(irb) | |
| // access flags 0x100A | |
| private static setPosition(Lorg/jruby/runtime/ThreadContext;I)V | |
| ALOAD 0 | |
| LDC "(irb)" | |
| ILOAD 1 | |
| INVOKEVIRTUAL org/jruby/runtime/ThreadContext.setFileAndLine (Ljava/lang/String;I)V | |
| RETURN | |
| MAXSTACK = 3 | |
| MAXLOCALS = 2 | |
| // access flags 0x1 | |
| public <init>()V | |
| ALOAD 0 | |
| INVOKESPECIAL org/jruby/ast/executable/AbstractScript.<init> ()V | |
| ALOAD 0 | |
| LDC "(irb)" | |
| PUTFIELD rubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006.filename : Ljava/lang/String; | |
| ALOAD 0 | |
| NEW org/jruby/ast/executable/RuntimeCache | |
| DUP | |
| INVOKESPECIAL org/jruby/ast/executable/RuntimeCache.<init> ()V | |
| PUTFIELD org/jruby/ast/executable/AbstractScript.runtimeCache : Lorg/jruby/ast/executable/RuntimeCache; | |
| ALOAD 0 | |
| LDC "\uffff\u0001\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000" | |
| INVOKEVIRTUAL org/jruby/ast/executable/AbstractScript.initFromDescriptor (Ljava/lang/String;)V | |
| RETURN | |
| MAXSTACK = 3 | |
| MAXLOCALS = 1 | |
| // access flags 0x9 | |
| public static __file__(Lrubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| @Lorg/jruby/anno/JRubyMethod;(name="__file__", frame=true, required=3, optional=0, rest=false) | |
| L0 | |
| ALOAD 3 | |
| ASTORE 11 | |
| ALOAD 4 | |
| ASTORE 12 | |
| ALOAD 5 | |
| ASTORE 13 | |
| L1 | |
| LINENUMBER 2 L1 | |
| ALOAD 13 | |
| ALOAD 11 | |
| ALOAD 12 | |
| DUP_X2 | |
| POP | |
| SWAP | |
| ASTORE 11 | |
| ASTORE 12 | |
| ASTORE 13 | |
| L2 | |
| LINENUMBER 3 L2 | |
| ALOAD 11 | |
| ARETURN | |
| LOCALVARIABLE a Lorg/jruby/runtime/builtin/IRubyObject; L0 L0 11 | |
| LOCALVARIABLE b Lorg/jruby/runtime/builtin/IRubyObject; L0 L0 12 | |
| LOCALVARIABLE c Lorg/jruby/runtime/builtin/IRubyObject; L0 L0 13 | |
| MAXSTACK = 4 | |
| MAXLOCALS = 14 | |
| // access flags 0x1 | |
| public __file__(Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;[Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| ALOAD 0 | |
| ALOAD 1 | |
| ALOAD 2 | |
| ALOAD 3 | |
| ALOAD 4 | |
| INVOKESTATIC rubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006.__file__ (Lrubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;[Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| ARETURN | |
| MAXSTACK = 5 | |
| MAXLOCALS = 5 | |
| // access flags 0x1 | |
| public __file__(Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| ALOAD 0 | |
| ALOAD 1 | |
| ALOAD 2 | |
| ALOAD 3 | |
| ALOAD 4 | |
| ALOAD 5 | |
| ALOAD 6 | |
| INVOKESTATIC rubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006.__file__ (Lrubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| ARETURN | |
| MAXSTACK = 7 | |
| MAXLOCALS = 7 | |
| // access flags 0x1009 | |
| public static __file__(Lrubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;[Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| ALOAD 1 | |
| ALOAD 3 | |
| ICONST_3 | |
| INVOKESTATIC org/jruby/runtime/Helpers.checkArgumentCount (Lorg/jruby/runtime/ThreadContext;[Lorg/jruby/runtime/builtin/IRubyObject;I)V | |
| ALOAD 0 | |
| ALOAD 1 | |
| ALOAD 2 | |
| ALOAD 3 | |
| LDC 0 | |
| AALOAD | |
| ALOAD 3 | |
| LDC 1 | |
| AALOAD | |
| ALOAD 3 | |
| LDC 2 | |
| AALOAD | |
| ALOAD 4 | |
| INVOKESTATIC rubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006.__file__ (Lrubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| ARETURN | |
| MAXSTACK = 7 | |
| MAXLOCALS = 5 | |
| } | |
| 2017-01-09T13:27:26.311-08:00: JITCompiler: done jitting:Object.Object.foo at (irb):1 | |
| => 20501 | |
| irb(main):006:0> |
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| public static __file__(Lrubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd231043998006;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject; | |
| @Lorg/jruby/anno/JRubyMethod;(name="__file__", frame=true, required=3, optional=0, rest=false) | |
| L0 | |
| ALOAD 3 | |
| ASTORE 11 | |
| ALOAD 4 | |
| ASTORE 12 | |
| ALOAD 5 | |
| ASTORE 13 | |
| L1 | |
| LINENUMBER 2 L1 | |
| ALOAD 13 | |
| ALOAD 11 | |
| ALOAD 12 | |
| DUP_X2 | |
| POP | |
| SWAP | |
| ASTORE 11 | |
| ASTORE 12 | |
| ASTORE 13 | |
| L2 | |
| LINENUMBER 3 L2 | |
| ALOAD 11 | |
| ARETURN | |
| LOCALVARIABLE a Lorg/jruby/runtime/builtin/IRubyObject; L0 L0 11 | |
| LOCALVARIABLE b Lorg/jruby/runtime/builtin/IRubyObject; L0 L0 12 | |
| LOCALVARIABLE c Lorg/jruby/runtime/builtin/IRubyObject; L0 L0 13 | |
| MAXSTACK = 4 | |
| MAXLOCALS = 14 |
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| $ JAVA_OPTS="-XX:-TieredCompilation -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly" ~/sdk/jruby-9.1.6.0/bin/jirb | |
| ... | |
| Decoding compiled method 0x000000010772e990: | |
| Code: | |
| [Entry Point] | |
| [Constants] | |
| # {method} '__file__' '(Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject;' in 'rubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd23594590671' | |
| # this: rsi:rsi = 'rubyjit/Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd23594590671' | |
| # parm0: rdx:rdx = 'org/jruby/runtime/ThreadContext' | |
| # parm1: rcx:rcx = 'org/jruby/runtime/builtin/IRubyObject' | |
| # parm2: r8:r8 = 'org/jruby/runtime/builtin/IRubyObject' | |
| # parm3: r9:r9 = 'org/jruby/runtime/builtin/IRubyObject' | |
| # parm4: rdi:rdi = 'org/jruby/runtime/builtin/IRubyObject' | |
| # parm5: [sp+0x20] = 'org/jruby/runtime/Block' (sp of caller) | |
| 0x000000010772eac0: mov 0x8(%rsi),%r10d | |
| 0x000000010772eac4: shl $0x3,%r10 | |
| 0x000000010772eac8: cmp %r10,%rax | |
| 0x000000010772eacb: jne 0x000000010768d960 ; {runtime_call} | |
| 0x000000010772ead1: data32 xchg %ax,%ax | |
| 0x000000010772ead4: nopl 0x0(%rax,%rax,1) | |
| 0x000000010772eadc: data32 data32 xchg %ax,%ax | |
| [Verified Entry Point] | |
| 0x000000010772eae0: sub $0x18,%rsp | |
| 0x000000010772eae7: mov %rbp,0x10(%rsp) ;*synchronization entry | |
| ; - rubyjit.Object$$foo_4bf0e5f1cc4a54c5f4e2f8727e91176c740fdd23594590671::__file__@-1 | |
| 0x000000010772eaec: mov %rdi,%rax | |
| 0x000000010772eaef: add $0x10,%rsp | |
| 0x000000010772eaf3: pop %rbp | |
| 0x000000010772eaf4: test %eax,-0x158eafa(%rip) # 0x00000001061a0000 | |
| ; {poll_return} | |
| 0x000000010772eafa: retq | |
| 0x000000010772eafb: hlt | |
| 0x000000010772eafc: hlt | |
| 0x000000010772eafd: hlt | |
| 0x000000010772eafe: hlt | |
| 0x000000010772eaff: hlt | |
| [Exception Handler] | |
| [Stub Code] | |
| 0x000000010772eb00: jmpq 0x00000001076b98e0 ; {no_reloc} | |
| [Deopt Handler Code] | |
| 0x000000010772eb05: callq 0x000000010772eb0a | |
| 0x000000010772eb0a: subq $0x5,(%rsp) | |
| 0x000000010772eb0f: jmpq 0x000000010768eb00 ; {runtime_call} | |
| 0x000000010772eb14: hlt | |
| 0x000000010772eb15: hlt | |
| 0x000000010772eb16: hlt | |
| 0x000000010772eb17: hlt |
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