Revert "[SROA] Avoid splitting loads/stores with irregular type"

This reverts commit 905f4eb.
Breaks check-llvm on most (all?) bots, see https://reviews.llvm.org/D99435

Author: nico

llvm/lib/Transforms/Scalar/SROA.cpp

@@ -768,8 +768,7 @@ class AllocaSlices::SliceBuilder : public PtrUseVisitor<SliceBuilder> {
     // We allow splitting of non-volatile loads and stores where the type is an
     // integer type. These may be used to implement 'memcpy' or other "transfer
     // of bits" patterns.
-    bool IsSplittable =
-        Ty->isIntegerTy() && !IsVolatile && DL.typeSizeEqualsStoreSize(Ty);
+    bool IsSplittable = Ty->isIntegerTy() && !IsVolatile;
 
     insertUse(I, Offset, Size, IsSplittable);
   }
@@ -3990,7 +3989,6 @@ bool SROA::presplitLoadsAndStores(AllocaInst &AI, AllocaSlices &AS) {
     SplitLoads.clear();
 
     IntegerType *Ty = cast<IntegerType>(LI->getType());
-    assert(Ty->getBitWidth() % 8 == 0);
     uint64_t LoadSize = Ty->getBitWidth() / 8;
     assert(LoadSize > 0 && "Cannot have a zero-sized integer load!");
 
@@ -4115,7 +4113,6 @@ bool SROA::presplitLoadsAndStores(AllocaInst &AI, AllocaSlices &AS) {
   for (StoreInst *SI : Stores) {
     auto *LI = cast<LoadInst>(SI->getValueOperand());
     IntegerType *Ty = cast<IntegerType>(LI->getType());
-    assert(Ty->getBitWidth() % 8 == 0);
     uint64_t StoreSize = Ty->getBitWidth() / 8;
     assert(StoreSize > 0 && "Cannot have a zero-sized integer store!");