Check XE enabled build with trunk LLVM

[nurmukhametov]

This can help to detect problems like this #3158 earlier.

[github-actions]

New Failure Analysis (2026-07-01 11:45 UTC)

Failed run: https://github.com/ispc/ispc/actions/runs/28504017157
LLVM SHA: 7e31f2cffd397ae65a91b0fb2bb7b2097e8e8a4b

Analysis Output

npm warn exec The following package was not found and will be installed: @anthropic-ai/claude-code@2.1.197
Ignoring 47 permissions.allow entries from .claude/settings.json: this workspace has not been trusted. Run Claude Code interactively here once and accept the trust dialog, or set projects["/home/runner/work/ispc/ispc"].hasTrustDialogAccepted: true in /home/runner/.claude.json.
The macro is defined and used consistently across the codebase. Here's the summary.

LLVM Trunk Failure Analysis — Run 28504017157

Category: LLVM API Change (not an ISPC regression, not an LLVM bug)

Root Cause

The LLVM-trunk container built fine, but ISPC failed to compile against it with:

src/ispc.cpp:159:56: error: no member named 'getImpliedExtensions' in 'llvm::AArch64::CpuInfo'

LLVM trunk commit 7fff69b — "[AArch64][NFC] remove CPUInfo.getImpliedExtensions() (#206422)", merged 2026-06-30 — removed the trivial accessor:

AArch64::ExtensionBitset getImpliedExtensions() const { return DefaultExtensions; }

ISPC's lGetARMTargetFeatures() called this to get the default AArch64 extension bitset. No ISPC commits landed in the last 24 hours (latest was 13713a6 from 2026-06-26), ruling out an ISPC-side regression. The SHA range (c452e7e…7e31f2c) corresponds to this LLVM cleanup.

Fix (applied to src/ispc.cpp:158-166)

Version-guarded on ISPC_LLVM_23_0 (trunk = LLVM 23), reading the DefaultExtensions field directly on new LLVM while keeping the old accessor for LLVM ≤22:

using CpuExtensionsType = llvm::AArch64::ExtensionBitset;
#if ISPC_LLVM_VERSION >= ISPC_LLVM_23_0
    // LLVM 23 removed CpuInfo::getImpliedExtensions(); access the
    // DefaultExtensions field directly (llvm/llvm-project#206422).
    CpuExtensionsType cpuExtensions = cpuInfo->DefaultExtensions;
#else
    CpuExtensionsType cpuExtensions = cpuInfo->getImpliedExtensions();
#endif
    llvm::AArch64::getExtensionFeatures(cpuExtensions, targetFeatures);

This is behavior-preserving (the removed method just returned DefaultExtensions, a field that predates LLVM 22) and matches the existing ISPC_LLVM_23_0 guarding pattern already used in module.cpp, intrinsics.cpp, and opt.cpp. I confirmed there are no other getImpliedExtensions usages in src/, builtins/, or stdlib/.

Notes

• No LLVM bug report is warranted — this is an intentional NFC API cleanup upstream.
• The fix cannot be built/verified locally here since it requires an LLVM 23 trunk toolchain; the release-LLVM (#else) path is unchanged, so 22.x builds are unaffected. Verification will come from the next nightly trunk build.

Would you like me to open a PR with this change?

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Generated with Claude Code

[github-actions]

New Failure Analysis (2026-07-02 11:21 UTC)

Failed run: https://github.com/ispc/ispc/actions/runs/28574927622
LLVM SHA: 1fac729d59897a3366937a276b4201a96f80b225

Analysis Output

npm warn exec The following package was not found and will be installed: @anthropic-ai/claude-code@2.1.197
Ignoring 47 permissions.allow entries from .claude/settings.json: this workspace has not been trusted. Run Claude Code interactively here once and accept the trust dialog, or set projects["/home/runner/work/ispc/ispc"].hasTrustDialogAccepted: true in /home/runner/.claude.json.
The llvm-trunk-analyzer agent completed the analysis and applied a fix. Here's the summary:

LLVM Trunk Failure Analysis

Category: LLVM API Change

What failed

The "Nightly Linux tests / LLVM trunk" run (28574927622) failed at the Build package step — ISPC no longer compiles against LLVM trunk (now LLVM 22.0):

src/ispc.cpp:159:56: error: no member named 'getImpliedExtensions' in 'llvm::AArch64::CpuInfo'

Root cause

LLVM trunk removed llvm::AArch64::CpuInfo::getImpliedExtensions() (upstream commit 7fff69b, "[AArch64][NFC] remove CPUInfo.getImpliedExtensions()"). The implied/default extensions are now exposed directly through the public member CpuInfo::DefaultExtensions — same ExtensionBitset type ISPC already passes to getExtensionFeatures(...), so it's a drop-in replacement.

This is not an ISPC regression — no recent ISPC source commits touch this code (last real source change was June 26; today's only commit is a CI-config change).

Fix applied

A version-guarded change in src/ispc.cpp (lGetARMTargetFeatures), consistent with the existing ISPC_LLVM_22_0 guards in the file:

using CpuExtensionsType = llvm::AArch64::ExtensionBitset;
#if ISPC_LLVM_VERSION >= ISPC_LLVM_22_0
            CpuExtensionsType cpuExtensions = cpuInfo->DefaultExtensions;
#else
            CpuExtensionsType cpuExtensions = cpuInfo->getImpliedExtensions();
#endif
            llvm::AArch64::getExtensionFeatures(cpuExtensions, targetFeatures);

The #else branch preserves backward compatibility with LLVM 21.0 and earlier. No new includes needed (version macros come transitively via ispc.h).

Verification (recommended before merging)

• Rebuild against LLVM trunk to confirm the compile error is resolved
• Confirm the released-LLVM branch (21.0/20.x) still builds via the #else path
• Re-run the linux-build-ispc-llvm-trunk job

One caveat flagged by the agent: the guard assumes LLVM 21.x still has getImpliedExtensions(). If the removal turns out to be backported to release/21.x, the threshold would need to drop to ISPC_LLVM_21_0 — but current evidence shows it only landed on trunk (22.0).

Note: this is a build-time API-compatibility fix only; it hasn't been compiled/tested here since building against LLVM trunk isn't available in this environment.

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Generated with Claude Code

[aneshlya]

@claude , fix llvm API change issue and create branch

[github-actions]

Claude finished @aneshlya's task —— View job • claude/issue-3159-20260702-1437 • Create PR ➔

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LLVM API Change Fix Completed

Task List:

• Read src/ispc.cpp to understand current code
• Apply version-guarded fix for LLVM API change
• Verify copyright year is 2026
• Run clang-format on modified files (formatting is correct)
• Commit and push changes
• Provide PR creation link

Summary

Fixed the LLVM 23.0 API compatibility issue in src/ispc.cpp:159-165. The change adds a version guard to handle the removal of CpuInfo::getImpliedExtensions() in LLVM trunk (23.0):

• For LLVM 23.0+: Access DefaultExtensions field directly
• For LLVM 22.0 and earlier: Use the existing getImpliedExtensions() method

This maintains backward compatibility while supporting the new LLVM API.

Note: Build and lit tests could not be run in this environment due to missing build directory and permission restrictions. The fix is based on the automated analysis and follows the established pattern for version guards in the codebase. The change will be verified by the CI when the PR is created.

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Branch |