JVM instruction spec compliance: aload

[LSantha]

Instruction: aload

• Spec Base: https://docs.oracle.com/javase/specs/jvms/se6/html/Instructions.doc.html
• Spec Page: https://docs.oracle.com/javase/specs/jvms/se6/html/Instructions2.doc.html

Wiki References

• JIT-Compilers.md - Overview of tiered compilation (L1A, L1B, L2)
• L1-Compiler.md - L1 compiler implementation details
• L2-Compiler-Deep-Dive.md - L2 compiler architecture
• Type-System-Internals.md - JVM type system

Note: Before reading wiki pages, clone the wiki repository if .wiki directory does not exist:
git clone git@github.com:LSantha/jnode_ai.wiki.git .wiki

Agent Instructions

1. Read Spec Pages:

   • Read the generic JVM spec: https://docs.oracle.com/javase/specs/jvms/se6/html/Instructions.doc.html
   • Read the specific instruction page: https://docs.oracle.com/javase/specs/jvms/se6/html/Instructions2.doc.html
   • Note all runtime exceptions and behavior requirements for aload

2. Read Wiki Pages:

   • First, check if .wiki directory exists. If not, clone it:
     git clone git@github.com:LSantha/jnode_ai.wiki.git .wiki
   • Review JIT-Compilers.md to understand the 3-tier compilation
   • Review L1-Compiler.md for implementation details
   • Review L2-Compiler-Deep-Dive.md for L2 specifics

3. Analyze Implementations:
   Find and review all compiler implementations in these packages:

   • l1a: core/src/core/org/jnode/vm/x86/compiler/l1a/ (X86BytecodeVisitor.java)
   • l1b: core/src/core/org/jnode/vm/x86/compiler/l1b/ (X86BytecodeVisitor.java)
   • l2: core/src/core/org/jnode/vm/x86/compiler/l2/ (L2ByteCodeSupportChecker.java, GenericX86CodeGenerator.java)

4. Verify Spec Compliance:
   Check for:

   • Operand stack effects (pop/push behavior)
   • Local variable array access
   • Type: must be reference

5. Document Results:
   Add a comment to this issue with the following format:

Spec compliance report

Compiler	Status	Issues
l1a	✅ PASS / ❌ FAIL / ⚠️ PARTIAL
l1b	✅ PASS / ❌ FAIL / ⚠️ PARTIAL
l2	✅ PASS / ❌ FAIL / ⚠️ PARTIAL

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Details

l1a Implementation

• Status: ✅ PASS / ❌ FAIL / ⚠️ PARTIAL
• Files: core/src/core/org/jnode/vm/x86/compiler/l1a/X86BytecodeVisitor.java:<line>
• Issues:

l1b Implementation

• Status: ✅ PASS / ❌ FAIL / ⚠️ PARTIAL
• Files: core/src/core/org/jnode/vm/x86/compiler/l1b/X86BytecodeVisitor.java:<line>
• Issues:

l2 Implementation

• Status: ✅ PASS / ❌ FAIL / ⚠️ PARTIAL
• Files: core/src/core/org/jnode/vm/x86/compiler/l2/L2ByteCodeSupportChecker.java:<line>
• Issues:

---

IMPORTANT: No changes to source code or wiki are permitted. This is a read-only analysis task.

[LSantha]

/oc Please proceed with this task.

[LSantha]

/oc Please proceed with this task.

[opencode-agent]

core/src/core/org/jnode/vm/compiler class CodeGenerator

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