[VPlan] Tighten SafeAVL matching in convertEVLExitCond. NFC #179164
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@llvm/pr-subscribers-vectorizers Author: Luke Lau (lukel97) ChangesFollow-up from #178181 (comment) Full diff: https://github.com/llvm/llvm-project/pull/179164.diff 1 Files Affected:
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index 43cffe5d30d6b..d59778f38f762 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -3320,9 +3320,12 @@ void VPlanTransforms::convertEVLExitCond(VPlan &Plan) {
return;
// The AVL may be capped to a safe distance.
- VPValue *SafeAVL;
- if (match(AVL, m_Select(m_VPValue(), m_VPValue(SafeAVL), m_VPValue())))
- AVL = SafeAVL;
+ VPValue *SafeAVL, *UnsafeAVL;
+ if (match(AVL,
+ m_Select(m_SpecificICmp(CmpInst::ICMP_ULT, m_VPValue(UnsafeAVL),
+ m_VPValue(SafeAVL)),
+ m_Deferred(UnsafeAVL), m_Deferred(SafeAVL))))
+ AVL = UnsafeAVL;
VPValue *AVLNext;
[[maybe_unused]] bool FoundAVLNext =
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Member
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@llvm/pr-subscribers-llvm-transforms Author: Luke Lau (lukel97) ChangesFollow-up from #178181 (comment) Full diff: https://github.com/llvm/llvm-project/pull/179164.diff 1 Files Affected:
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index 43cffe5d30d6b..d59778f38f762 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -3320,9 +3320,12 @@ void VPlanTransforms::convertEVLExitCond(VPlan &Plan) {
return;
// The AVL may be capped to a safe distance.
- VPValue *SafeAVL;
- if (match(AVL, m_Select(m_VPValue(), m_VPValue(SafeAVL), m_VPValue())))
- AVL = SafeAVL;
+ VPValue *SafeAVL, *UnsafeAVL;
+ if (match(AVL,
+ m_Select(m_SpecificICmp(CmpInst::ICMP_ULT, m_VPValue(UnsafeAVL),
+ m_VPValue(SafeAVL)),
+ m_Deferred(UnsafeAVL), m_Deferred(SafeAVL))))
+ AVL = UnsafeAVL;
VPValue *AVLNext;
[[maybe_unused]] bool FoundAVLNext =
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Follow-up from #178181 (comment)