Revert "[SLP]Do extra analysis int minbitwidth if some checks return false."

This reverts commit e4b7724 to fixx the
issues reported in #84536.

Author: alexey-bataev

llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

@@ -11935,8 +11935,7 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E, bool PostponedPHIs) {
         Builder.SetCurrentDebugLocation(PH->getDebugLoc());
         Value *Vec = vectorizeOperand(E, I, /*PostponedPHIs=*/true);
         if (VecTy != Vec->getType()) {
-          assert((It != MinBWs.end() ||
-                  getOperandEntry(E, I)->State == TreeEntry::NeedToGather ||
+          assert((getOperandEntry(E, I)->State == TreeEntry::NeedToGather ||
                   MinBWs.contains(getOperandEntry(E, I))) &&
                  "Expected item in MinBWs.");
           Vec = Builder.CreateIntCast(Vec, VecTy, It->second.second);
@@ -12194,8 +12193,7 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E, bool PostponedPHIs) {
         return E->VectorizedValue;
       }
       if (L->getType() != R->getType()) {
-        assert((It != MinBWs.end() ||
-                getOperandEntry(E, 0)->State == TreeEntry::NeedToGather ||
+        assert((getOperandEntry(E, 0)->State == TreeEntry::NeedToGather ||
                 getOperandEntry(E, 1)->State == TreeEntry::NeedToGather ||
                 MinBWs.contains(getOperandEntry(E, 0)) ||
                 MinBWs.contains(getOperandEntry(E, 1))) &&
@@ -12234,8 +12232,7 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E, bool PostponedPHIs) {
         return E->VectorizedValue;
       }
       if (True->getType() != False->getType()) {
-        assert((It != MinBWs.end() ||
-                getOperandEntry(E, 1)->State == TreeEntry::NeedToGather ||
+        assert((getOperandEntry(E, 1)->State == TreeEntry::NeedToGather ||
                 getOperandEntry(E, 2)->State == TreeEntry::NeedToGather ||
                 MinBWs.contains(getOperandEntry(E, 1)) ||
                 MinBWs.contains(getOperandEntry(E, 2))) &&
@@ -12305,8 +12302,7 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E, bool PostponedPHIs) {
         return E->VectorizedValue;
       }
       if (LHS->getType() != RHS->getType()) {
-        assert((It != MinBWs.end() ||
-                getOperandEntry(E, 0)->State == TreeEntry::NeedToGather ||
+        assert((getOperandEntry(E, 0)->State == TreeEntry::NeedToGather ||
                 getOperandEntry(E, 1)->State == TreeEntry::NeedToGather ||
                 MinBWs.contains(getOperandEntry(E, 0)) ||
                 MinBWs.contains(getOperandEntry(E, 1))) &&
@@ -12544,8 +12540,7 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E, bool PostponedPHIs) {
         return E->VectorizedValue;
       }
       if (LHS && RHS && LHS->getType() != RHS->getType()) {
-        assert((It != MinBWs.end() ||
-                getOperandEntry(E, 0)->State == TreeEntry::NeedToGather ||
+        assert((getOperandEntry(E, 0)->State == TreeEntry::NeedToGather ||
                 getOperandEntry(E, 1)->State == TreeEntry::NeedToGather ||
                 MinBWs.contains(getOperandEntry(E, 0)) ||
                 MinBWs.contains(getOperandEntry(E, 1))) &&