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r311077 - using VPlan in loop vectorizer - generates bad IR for PPC (and probably others) #33596

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chandlerc opened this issue Aug 20, 2017 · 2 comments
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r311077 - using VPlan in loop vectorizer - generates bad IR for PPC (and probably others) #33596

chandlerc opened this issue Aug 20, 2017 · 2 comments
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@ayalz
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@chandlerc
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Bugzilla Link 34248
Resolution FIXED
Resolved on Sep 23, 2017 10:41
Version trunk
OS All
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CC @ayalz
Fixed by commit(s) 311849

Extended Description

When testing LLVM with the VPlan based vectorization enabled we found lots of issues on non-x86 architectures.

I've attached a reduced IR test case from libpng on PPC64. It assert fails with:

% opt -disable-output -aa-pipeline=default -passes='default' png.simplified.ll

I'm going to revert the patch while you investigate.
@chandlerc
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assigned to @ayalz

@ayalz
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ayalz commented Aug 23, 2017

Thanks. We've uploaded to D32871 a revised version which fixes the reproducer. Could you please test it pre-commit and let us know if any issues remain, or would you prefer we commit?

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 10, 2021
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@chandlerc @ayalz