burn(test): Add tests for dynamic array index helper edge cases in LIR lowering

[bkmashiro]

Task

• ID: 01KNHZFNWDV4871DHZ3C225PYM
• Type: test
• Priority: 2
• CLI: claude

Description

In src/tests/lir/lower.test.ts (or a new file src/tests/lir/lower-dynamic.test.ts), add tests covering: (1) getDynIdxHelper and getDynWrtHelper in src/lir/lower.ts with storage path strings containing special characters (colons, dots, slashes); (2) cache key collision prevention when two different array types produce similar helper names; (3) multi-predecessor block handling for blocks with more than 2 predecessors; (4) the entry block special-case in block extraction. Read src/lir/lower.ts lines 89-192 for the implementation details before writing the tests.

Changes

src/__tests__/lir/lower-dynamic.test.ts | 383 ++++++++++++++++++++++++++++++++
 1 file changed, 383 insertions(+)

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