Index: llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp =================================================================== --- llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp +++ llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -7382,8 +7382,8 @@ // Check the loop for a trip count threshold: // do not vectorize loops with a tiny trip count. - const unsigned TC = SE->getSmallConstantTripCount(L); - if (TC > 0u && TC < TinyTripCountVectorThreshold) { + const unsigned MaxTC = SE->getSmallConstantMaxTripCount(L); + if (MaxTC > 0u && MaxTC < TinyTripCountVectorThreshold) { DEBUG(dbgs() << "LV: Found a loop with a very small trip count. " << "This loop is not worth vectorizing."); if (Hints.getForce() == LoopVectorizeHints::FK_Enabled) Index: llvm/trunk/test/Transforms/LoopVectorize/small-loop.ll =================================================================== --- llvm/trunk/test/Transforms/LoopVectorize/small-loop.ll +++ llvm/trunk/test/Transforms/LoopVectorize/small-loop.ll @@ -30,3 +30,28 @@ ret void } +;CHECK-LABEL: @bound1( +;CHECK-NOT: load <4 x i32> +;CHECK: ret void +define void @bound1(i32 %k) nounwind uwtable ssp { + br label %1 + +;