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MIRROR: javascript for 🐜's, a tiny runtime with big ambitions ant.themackabu.dev
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1234567891011121314151617181920212223242526272829const assert = require('node:assert');const { spawnSync } = require('node:child_process');const { join } = require('node:path');
const child = spawnSync(process.execPath, [join(__dirname, 'test_jit_inline_numeric_key.cjs')], { encoding: 'utf8', env: { ...process.env, ANT_DEBUG: 'dump/vm:jit' }, maxBuffer: 32 * 1024 * 1024, timeout: 30000,});assert.strictEqual(child.status, 0, String(child.error || child.stderr));assert.match(child.stdout, /PASS inline numeric keys/);const mirModule = child.stderr.match(/jit_callReadKey_[^\n]*:\s*module[\s\S]*?endmodule/);assert.ok(mirModule, 'missing caller compilation');const mir = mirModule[0];assert.match(mir, /\bdmov\s+inl\d+_dt\d+,/, 'numeric argument must be inlined');assert.match(mir, /\bcall\s+[^\n]*jit_helper_get_elem_inline,/, 'generic element fallback must exist');assert.match(mir, /\bd2i\s+index_integer_\d+,\s*inl\d+_dt\d+\b/, 'index guard must use the preserved double register');assert.match(mir, /\bubgt\s+L\d+,\s*index_bits_/, 'numeric key bits must guard the nonnegative finite index range');assert.doesNotMatch(mir, /index_magnitude_|\bubgt\s+L\d+,\s*index_integer_/, 'the bit range guard must replace magnitude extraction and the integer range guard');assert.doesNotMatch(mir, /\bubgt\s+L\d+,\s*inl\d+_s\d+,/, 'known numeric key must not repeat the number-tag guard');assert.doesNotMatch(mir, /\bi2db\s+index_double_\d+,/, 'known numeric key must not be unboxed again');console.log('PASS inline numeric key code generation');