[LV][NFC] Improve readability with bool instead of auto

Author: pfusik

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -3204,7 +3204,7 @@ void LoopVectorizationCostModel::collectLoopScalars(ElementCount VF) {
 
     // Determine if all users of the induction variable are scalar after
     // vectorization.
-    auto ScalarInd = llvm::all_of(Ind->users(), [&](User *U) -> bool {
+    bool ScalarInd = llvm::all_of(Ind->users(), [&](User *U) -> bool {
       auto *I = cast<Instruction>(U);
       return I == IndUpdate || !TheLoop->contains(I) || Worklist.count(I) ||
              IsDirectLoadStoreFromPtrIndvar(Ind, I);
@@ -3221,7 +3221,7 @@ void LoopVectorizationCostModel::collectLoopScalars(ElementCount VF) {
 
     // Determine if all users of the induction variable update instruction are
     // scalar after vectorization.
-    auto ScalarIndUpdate =
+    bool ScalarIndUpdate =
         llvm::all_of(IndUpdate->users(), [&](User *U) -> bool {
           auto *I = cast<Instruction>(U);
           return I == Ind || !TheLoop->contains(I) || Worklist.count(I) ||
@@ -3649,11 +3649,10 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
     if (IsOutOfScope(V))
       continue;
     auto *I = cast<Instruction>(V);
-    auto UsersAreMemAccesses =
-      llvm::all_of(I->users(), [&](User *U) -> bool {
-        auto *UI = cast<Instruction>(U);
-        return TheLoop->contains(UI) && IsVectorizedMemAccessUse(UI, V);
-      });
+    bool UsersAreMemAccesses = llvm::all_of(I->users(), [&](User *U) -> bool {
+      auto *UI = cast<Instruction>(U);
+      return TheLoop->contains(UI) && IsVectorizedMemAccessUse(UI, V);
+    });
     if (UsersAreMemAccesses)
       AddToWorklistIfAllowed(I);
   }
@@ -3698,7 +3697,7 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
 
     // Determine if all users of the induction variable are uniform after
     // vectorization.
-    auto UniformInd = llvm::all_of(Ind->users(), [&](User *U) -> bool {
+    bool UniformInd = llvm::all_of(Ind->users(), [&](User *U) -> bool {
       auto *I = cast<Instruction>(U);
       return I == IndUpdate || !TheLoop->contains(I) || Worklist.count(I) ||
              IsVectorizedMemAccessUse(I, Ind);
@@ -3708,7 +3707,7 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
 
     // Determine if all users of the induction variable update instruction are
     // uniform after vectorization.
-    auto UniformIndUpdate =
+    bool UniformIndUpdate =
         llvm::all_of(IndUpdate->users(), [&](User *U) -> bool {
           auto *I = cast<Instruction>(U);
           return I == Ind || !TheLoop->contains(I) || Worklist.count(I) ||