ispc-lit-tests

Lit tests verify compiler output, diagnostics, and platform behavior. Ensure correctness and prevent regressions.

• Tests compiler output, diagnostics, and platform behavior
• Validate correctness and prevent regressions
• Use for code generation verification and regression testing
• Ensure consistent and portable test results

• Always use --nowrap for consistent FileCheck matching
• Use --nostdlib when not testing library code
• Avoid export unless explicitly testing export behavior
• Use portable patterns like [[WIDTH]] and [[TYPE]]
• Add REQUIRES for target-specific or feature-dependent tests
• Use --debug-phase to inspect intermediate IR passes
• Document test intent and expected outcomes
• Keep tests minimal and focused on one behavior

1. 1.Use when validating compiler output, diagnostics, or platform behavior
2. 2.Include --nowrap and --nostdlib in test commands
3. 3.Use REQUIRES for target or feature dependencies
4. 4.Write clear comments describing test purpose and expected outcome
5. 5.Name tests with issue numbers or descriptive names
6. 6.Run with cmake build commands: check-all or check-one