How do I handle target-specific testing for AVX or SSE?

The skill provides patterns for using the --target flag combined with REQUIRES directives (e.g., REQUIRES: X86_ENABLED) to ensure tests only run on compatible host environments.

Why does this skill recommend the --nowrap flag?

The --nowrap flag prevents the ISPC compiler from wrapping long lines in its output, which is essential for ensuring that FileCheck patterns match reliably without being broken by arbitrary line breaks.

What are ISPC lit tests?

Lit tests are concise, automated tests used by the ISPC project to verify compiler output, including LLVM IR, assembly code, and diagnostic messages using the LLVM Integrated Tester (lit) and FileCheck.

Can I use this skill to test specific compiler optimization passes?

Yes, it includes instructions on using the --debug-phase flag to dump intermediate IR at specific stages, allowing you to verify that specific optimizations are performing as expected.

ISPC Lit Testing Specialist

Name: ISPC Lit Testing Specialist
Author: Activer007

byActiver007

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Provides expert guidance and templates for writing robust, portable LLVM-based lit tests for the ISPC compiler.

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The ISPC Lit Testing Specialist skill is designed for compiler engineers and contributors working on the Intel Implicit SPMD Program Compiler (ISPC). It offers a comprehensive framework of best practices for writing regression tests, verifying LLVM IR or assembly output, and checking compiler diagnostics. By enforcing standardized patterns—such as using the --nowrap flag, implementing portable Check patterns, and managing target-specific requirements—this skill helps developers create maintainable, high-quality test suites that ensure compiler correctness across various hardware architectures and LLVM versions.

Características Principales

Standardized boilerplate for ISPC-specific lit tests
Portable LLVM IR and assembly verification patterns
Best practices for regression test naming and documentation
Target-specific testing guidance for architectures like AVX-512
Advanced IR testing using --debug-phase and optimization pass dumps
0 GitHub stars

Casos de Uso

Verifying generated code quality and assembly output for specific hardware targets
Validating compiler diagnostic messages, warnings, and error reporting
Creating regression tests for reported GitHub issues to prevent future breaks

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Características Principales

Standardized boilerplate for ISPC-specific lit tests
Portable LLVM IR and assembly verification patterns
Best practices for regression test naming and documentation
Target-specific testing guidance for architectures like AVX-512
Advanced IR testing using --debug-phase and optimization pass dumps
0 GitHub stars

Casos de Uso

Verifying generated code quality and assembly output for specific hardware targets
Validating compiler diagnostic messages, warnings, and error reporting
Creating regression tests for reported GitHub issues to prevent future breaks