[LV] Prevent query the computeCost() when VF=1 in emitInvalidCostRemarks(). #117288
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@llvm/pr-subscribers-llvm-transforms Author: Elvis Wang (ElvisWang123) ChangesWe should only query the computeCost() when the VF is vector. Full diff: https://github.com/llvm/llvm-project/pull/117288.diff 1 Files Affected:
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index d13770a35c108f..5a61a6f83e3764 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4373,6 +4373,9 @@ void LoopVectorizationPlanner::emitInvalidCostRemarks(
SmallVector<RecipeVFPair> InvalidCosts;
for (const auto &Plan : VPlans) {
for (ElementCount VF : Plan->vectorFactors()) {
+ if (VF.isScalar())
+ continue;
+
VPCostContext CostCtx(CM.TTI, *CM.TLI, Legal->getWidestInductionType(),
CM);
precomputeCosts(*Plan, VF, CostCtx);
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@llvm/pr-subscribers-vectorizers Author: Elvis Wang (ElvisWang123) ChangesWe should only query the computeCost() when the VF is vector. Full diff: https://github.com/llvm/llvm-project/pull/117288.diff 1 Files Affected:
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index d13770a35c108f..5a61a6f83e3764 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4373,6 +4373,9 @@ void LoopVectorizationPlanner::emitInvalidCostRemarks(
SmallVector<RecipeVFPair> InvalidCosts;
for (const auto &Plan : VPlans) {
for (ElementCount VF : Plan->vectorFactors()) {
+ if (VF.isScalar())
+ continue;
+
VPCostContext CostCtx(CM.TTI, *CM.TLI, Legal->getWidestInductionType(),
CM);
precomputeCosts(*Plan, VF, CostCtx);
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We should only query the computeCost() when the VF is vector.