[llvm] e33cbe0 - [LV] Rename replaceMaskWithCompare -> replaceMaskWithCompareForScalarPlan (#216340)

[via llvm-commits]

Author: Kerry McLaughlin
Date: 2026-08-24T13:15:50+01:00
New Revision: e33cbe0b35bc36c1e94ce0ad1d8bd4ca939d6561

URL: https://github.com/llvm/llvm-project/commit/e33cbe0b35bc36c1e94ce0ad1d8bd4ca939d6561
DIFF: https://github.com/llvm/llvm-project/commit/e33cbe0b35bc36c1e94ce0ad1d8bd4ca939d6561.diff

LOG: [LV] Rename replaceMaskWithCompare -> replaceMaskWithCompareForScalarPlan (#216340)

Added: 
    

Modified: 
    llvm/lib/Transforms/Vectorize/VPlan.h
    llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index deabeb97183c2..fe1342e4309ab 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -1243,9 +1243,9 @@ class LLVM_ABI_FOR_TEST VPInstruction : public VPRecipeWithIRFlags,
     // Creates a mask where each lane is active (true) whilst the current
     // counter (first operand + index) is less than the second operand. i.e.
     //    mask[i] = icmpt ult (op0 + i), op1
-    // ActiveLaneMask is used for tail-folding, with the exception of the
-    // DataAndControlFlow style. The size of the mask returned is VF.
-    // When unrolled, ActiveLaneMask is duplicated.
+    // ActiveLaneMask is used for early-exit loops with stores, plus tail
+    // folding for all styles except DataAndControlFlow. The size of the
+    // mask returned is VF. When unrolled, ActiveLaneMask is duplicated.
     ActiveLaneMask,
     // As above, but takes an additional operand (Multiplier). The size of
     // the mask returned is VF * Multiplier (UF, op2).

diff  --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index 6eaf8a4ac2e68..9027846fa54f9 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -2046,7 +2046,8 @@ static bool isConditionTrueViaVFAndUF(VPValue *Cond, VPlan &Plan,
 // Replaces ExtractVectorForPart instructions with ICMP when the VF is scalar
 // and the source is a WideActiveLaneMask. The unused mask is removed later
 // when removing dead recipes.
-static bool replaceMaskWithCompare(VPlan &Plan, ElementCount BestVF) {
+static bool replaceMaskWithCompareForScalarPlan(VPlan &Plan,
+                                                ElementCount BestVF) {
   if (!BestVF.isScalar())
     return false;
 
@@ -2150,7 +2151,7 @@ void VPlanTransforms::optimizeForVFAndUF(VPlan &Plan, ElementCount BestVF,
 
   bool MadeChange =
       simplifyBranchConditionForVFAndUF(Plan, BestVF, BestUF, PSE);
-  MadeChange |= replaceMaskWithCompare(Plan, BestVF);
+  MadeChange |= replaceMaskWithCompareForScalarPlan(Plan, BestVF);
   MadeChange |= optimizeVectorInductionWidthForTCAndVFUF(Plan, BestVF, BestUF);
 
   if (MadeChange) {