Testsuite Status B6d4eaa96d206824782da86a8d50a7732bf42dee Analysis And Insights

Hey everyone! Let's dive into the latest testsuite status for commit b6d4eaa96d206824782da86a8d50a7732bf42dee. This report, brought to you by patrick-rivos and the gcc-postcommit-ci team, gives us a detailed look at how the GCC, G++, and GFortran compilers are performing across various platforms and configurations. We'll break down the new failures, resolved failures, and unresolved failures, so you know exactly what's going on. Let’s get started!

Summary

First, a quick overview. The tables below summarize the current status. It's super important to keep an eye on these numbers to ensure our compilers are in tip-top shape. Here’s how things stand:

Understanding the Testsuite Status: Unresolved Failures

Okay, let's break down the unresolved failures in detail. As you guys can see, we have quite a few configurations listed here, and it’s crucial to understand what these mean. The unresolved failures give us a clear picture of where the compiler is still struggling. Let's dive deeper into what these failures mean for different configurations and how they impact the overall stability of GCC, G++, and GFortran.

Linux Configurations

Starting with the Linux configurations, we have several architectures and profiles listed, such as RVA23U64, rv32, and rv64. Each of these represents a specific configuration for the RISC-V architecture, which is gaining traction in embedded systems and other areas. The lp64d and ilp32d refer to the data model used, where lp64d means long pointers and 64-bit doubles, while ilp32d means integer, long, and pointers are 32-bit, with 64-bit doubles. The medlow indicates the memory model, and multilib means that the tests are run with multiple target libraries.

• linux: RVA23U64 profile lp64d medlow multilib: This configuration shows a significant number of failures, with 183 failures in GCC and 31 in G++, and 12 in GFortran. The high number of failures here might indicate issues with the specific RISC-V profile or the interaction between the libraries in the multilib setup. It's important to investigate these failures to ensure that the compiler correctly supports this profile.
• linux: rv32 Bitmanip ilp32d medlow and linux: rv32gc ilp32d medlow: These configurations have identical failure counts: 109 in GCC, 23 in G++, and 12 in GFortran. The rv32 indicates a 32-bit RISC-V architecture, and the Bitmanip and gc indicate specific instruction set extensions. The consistency in failure counts suggests a common underlying issue affecting these configurations. Investigating the specific tests that fail could reveal the root cause.
• linux: rv32gcv ilp32d medlow multilib: This configuration has a high number of failures, with 192 in GCC and 31 in G++, and 12 in GFortran. The gcv extension includes vector instructions, so these failures could be related to vectorization or the interaction between vector instructions and other parts of the code. The multilib aspect also adds complexity, so it's essential to examine how different libraries interact in this environment.
• linux: rv64 Bitmanip lp64d medlow and linux: rv64gc lp64d medlow: These 64-bit configurations show lower failure counts compared to their 32-bit counterparts, with 92 failures in GCC, 23 in G++, and 12 in GFortran. However, these failures still need attention to ensure the 64-bit RISC-V architecture is fully supported.
• linux: rv64 Vector Crypto lp64d medlow multilib: This is one of the configurations with the highest failure counts: 233 in GCC, 31 in G++, and 12 in GFortran. The combination of vector instructions, cryptography extensions, and multilib makes this a complex environment. Failures here could stem from issues in any of these areas, making debugging a challenge.
• linux: rv64gcv lp64d medlow multilib: Similar to the rv32gcv configuration, this one shows a high number of failures, with 181 in GCC, 31 in G++, and 12 in GFortran. The gcv extension again points to potential issues with vector instruction support. It's crucial to identify the specific tests failing to understand the nature of these issues.

Newlib Configurations

Moving on to the Newlib configurations, these are particularly important for embedded systems, where Newlib is a common C library. These configurations target similar RISC-V architectures but use Newlib as the standard library instead of glibc, which is more common in general-purpose Linux systems.

• newlib: RVA23U64 profile lp64d medlow multilib: This configuration has 202 failures in GCC, 31 in G++, and no failures in GFortran. The RVA23U64 profile, combined with Newlib, appears to have significant issues, especially in GCC. Debugging these failures is essential for ensuring that the compiler can be used in embedded environments that rely on this profile.
• newlib: rv32 Bitmanip ilp32d medlow: This configuration shows a very high number of failures in GCC, with 314, while G++ has 23 failures, and GFortran has none. The combination of rv32 and Bitmanip extensions with Newlib seems to be problematic, and these failures need to be addressed to ensure the compiler's reliability in embedded systems.
• newlib: rv32gc ilp32d medlow: This configuration has 131 failures in GCC, 23 in G++, and no failures in GFortran. Again, the rv32 architecture combined with Newlib presents challenges, and these failures need to be investigated to identify the underlying issues.
• newlib: rv32gcv ilp32d medlow multilib: This configuration has the highest number of failures in the Newlib set, with 394 in GCC and 31 in G++, and no failures in GFortran. The gcv extension, along with Newlib and multilib, creates a complex environment that is clearly causing issues. These failures are critical to address for the compiler's performance in embedded systems using vector instructions.
• newlib: rv32imac ilp32 medlow multilib, newlib: rv32imac_zba_zbb_zbc_zbs ilp32 medlow multilib, newlib: rv32imc ilp32 medlow multilib, newlib: rv32imc_zba_zbb_zbc_zbs ilp32 medlow multilib, newlib: rv32imc_zba_zbb_zbc_zbs_zicsr_zifencei ilp32 medlow multilib, newlib: rv32imc_zicsr_zifencei ilp32 medlow multilib: These configurations show a range of failures in GCC, from 139 to 315, while G++ has consistent failures at 23, and GFortran has none. The variations in instruction set extensions and the use of Newlib highlight potential issues with specific extensions or their interactions within the Newlib environment. The specific extensions zba, zbb, zbc, zbs, zicsr, and zifencei relate to bit manipulation, base instructions, and control and status registers, respectively.
• newlib: rv64 Bitmanip lp64d medlow, newlib: rv64gc lp64d medlow: These 64-bit configurations have similar failure counts, with 114 failures in GCC, 23 in G++, and no failures in GFortran. The consistency in failures suggests a common issue affecting these configurations when using Newlib.
• newlib: rv64 Vector Crypto lp64d medlow multilib: This configuration has 252 failures in GCC, 31 in G++, and no failures in GFortran. The combination of vector instructions, cryptography extensions, and Newlib creates a complex scenario, and the failures here are important to address for embedded systems using these features.
• newlib: rv64gcv lp64d medlow multilib: This configuration has 200 failures in GCC, 31 in G++, and no failures in GFortran. As with other gcv configurations, the vector instruction support in Newlib is a key area to investigate.
• newlib: rv64imac lp64 medlow multilib, newlib: rv64imac_zba_zbb_zbc_zbs lp64 medlow multilib, newlib: rv64imc lp64 medlow multilib, newlib: rv64imc_zba_zbb_zbc_zbs lp64 medlow multilib, newlib: rv64imc_zba_zbb_zbc_zbs_zicsr_zifencei lp64 medlow multilib, newlib: rv64imc_zicsr_zifencei lp64 medlow multilib: These configurations show varying failure counts in GCC, ranging from 115 to 308, while G++ consistently has 23 failures, and GFortran has none. The different instruction set extensions and their interactions with Newlib are critical to examine to ensure the compiler's reliability.

Key Takeaways from Unresolved Failures

From the unresolved failures, we can see a few key patterns:

1. RISC-V Architectures: Many failures are concentrated in RISC-V configurations, especially those involving vector and cryptography extensions. This suggests that these newer features might have undiscovered bugs or need further optimization.
2. Newlib: The use of Newlib as the standard library seems to introduce additional failures, particularly in GCC. This could be due to differences in how Newlib handles certain operations compared to glibc, or it could expose bugs in the compiler that are not apparent in glibc environments.
3. Multilib: Configurations using multilib tend to have higher failure counts, indicating that the interaction between different libraries might be a source of issues. This complexity adds to the challenge of debugging, as it requires understanding how various components interact.

Taking Action on Unresolved Failures

So, what’s next? Addressing these unresolved failures is crucial for the stability and reliability of the GCC compiler suite. Here are some steps that can be taken:

• Detailed Test Analysis: It’s important to dive into the specifics of the failing tests. Which tests are failing consistently across configurations? Are there common patterns in the failures? Understanding the details can help pinpoint the root causes.
• Targeted Debugging: Once the failing tests are identified, developers can focus on debugging those specific areas. This might involve using debugging tools, examining the generated assembly code, or stepping through the compiler’s execution.
• Community Collaboration: The GCC community is vast and diverse, with experts in various areas. Collaboration and discussion can lead to faster identification and resolution of issues. Sharing findings and seeking input from others can be invaluable.
• Continuous Monitoring: Testsuite status is a moving target. Continuous monitoring of test results and regular analysis of failures are essential to ensure that issues are addressed promptly and that new issues are caught early.

Associated Run

For those who want to dig even deeper, the associated run for this testsuite status is available here: https://github.com/patrick-rivos/gcc-postcommit-ci/actions/runs/16664597468. This link will take you to the full details of the test run, including logs and other relevant information.

Conclusion

Alright, guys, that’s the rundown on the testsuite status for commit b6d4eaa96d206824782da86a8d50a7732bf42dee. We've taken a detailed look at the unresolved failures across different configurations, and it’s clear that there are areas needing attention, particularly in RISC-V architectures and Newlib environments. By understanding these issues and working together, we can continue to improve the robustness of GCC, G++, and GFortran. Stay tuned for the next update, and let’s keep those compilers running smoothly!