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[LV] Fix missing entry in willGenerateVectors #136712

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Merged
merged 5 commits into from
Apr 23, 2025
Merged

[LV] Fix missing entry in willGenerateVectors #136712

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dafa614
[LV] Fix missing entry in willGenerateVectors
artagnon Apr 22, 2025
221e511
[LV] Add test for crash
artagnon Apr 22, 2025
ec61aa4
[LV] Generate CHECK lines for crash for completeness
artagnon Apr 22, 2025
5084647
[LV] Strip immediate UB
artagnon Apr 22, 2025
125056d
[LV] Tweak test
artagnon Apr 23, 2025
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[LV] Fix missing entry in willGenerateVectors 
willGenerateVectors switches on opcodes of a recipe, but Histogram is
missing in the switch statement, which could cause a crash in some
cases. The crash was initially observed when developing another patch:
no test case is included with this patch, as the bug is evident.
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@artagnon
artagnon committed Apr 22, 2025
commit dafa614df51f693f6289d2f88d9cf2d87f3c696f
1 change: 1 addition & 0 deletions llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
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Expand Up @@ -4460,6 +4460,7 @@ static bool willGenerateVectors(VPlan &Plan, ElementCount VF,
case VPDef::VPWidenSelectSC:
case VPDef::VPBlendSC:
case VPDef::VPFirstOrderRecurrencePHISC:
case VPDef::VPHistogramSC:
case VPDef::VPWidenPHISC:
case VPDef::VPWidenIntOrFpInductionSC:
case VPDef::VPWidenPointerInductionSC:
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