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alexey-bataev opened this issue Apr 15, 2025 · 3 comments · Fixed by #135847
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Crash on AARCH64 codegen #135821

alexey-bataev opened this issue Apr 15, 2025 · 3 comments · Fixed by #135847
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crash Prefer [crash-on-valid] or [crash-on-invalid] llvm:SelectionDAG SelectionDAGISel as well

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@alexey-bataev
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https://godbolt.org/z/dzMqjsMdj

Crashes AARCH64 codegen
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llvmbot commented Apr 15, 2025

@llvm/issue-subscribers-backend-aarch64

Author: Alexey Bataev (alexey-bataev)

https://godbolt.org/z/dzMqjsMdj

Crashes AARCH64 codegen

@alexey-bataev alexey-bataev mentioned this issue Apr 15, 2025
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topperc commented Apr 15, 2025

Enabling assertions gives an earlier error. https://godbolt.org/z/q4o4T9za1

@topperc topperc self-assigned this Apr 15, 2025
topperc added a commit to topperc/llvm-project that referenced this issue Apr 15, 2025
@topperc
[DAGCombiner] Disable narrowExtractedVectorLoad for indexed loads.
644ad38 
The later code does not expect or preserve the index output.

Fixes llvm#135821
@topperc topperc mentioned this issue Apr 15, 2025
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topperc added a commit that referenced this issue Apr 15, 2025
@topperc
[DAGCombiner] Disable narrowExtractedVectorLoad for indexed loads. (#…
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8ed397d 
…135847)

The later code does not expect or preserve the index output.

Fixes #135821
@EugeneZelenko EugeneZelenko added crash Prefer [crash-on-valid] or [crash-on-invalid] llvm:SelectionDAG SelectionDAGISel as well and removed backend:AArch64 labels Apr 15, 2025
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alexfh commented Apr 15, 2025

Thanks for the quick resolution!

var-const pushed a commit to ldionne/llvm-project that referenced this issue Apr 17, 2025
@topperc @var-const
[DAGCombiner] Disable narrowExtractedVectorLoad for indexed loads. (l…
57c1c91 
…lvm#135847)

The later code does not expect or preserve the index output.

Fixes llvm#135821
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crash Prefer [crash-on-valid] or [crash-on-invalid] llvm:SelectionDAG SelectionDAGISel as well
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[DAGCombiner] Disable narrowExtractedVectorLoad for indexed loads. topperc/llvm-project
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