[MemoryLocation] Use LocationSize instead of ints; NFC

Trying to keep these patches super small so they're easily post-commit
verifiable, as requested in D44748.

This one sadly isn't *super* small, but all of the changes here are
either to:
- libfuncs that are passed a constant size (memcpy, memset, ...)
- instructions that store/load a constant size

So they have to be precise

llvm-svn: 350017

llvm/lib/Analysis/MemoryLocation.cpp

@@ -37,8 +37,9 @@ MemoryLocation MemoryLocation::get(const LoadInst *LI) {
   LI->getAAMetadata(AATags);
   const auto &DL = LI->getModule()->getDataLayout();
 
-  return MemoryLocation(LI->getPointerOperand(),
-                        DL.getTypeStoreSize(LI->getType()), AATags);
+  return MemoryLocation(
+      LI->getPointerOperand(),
+      LocationSize::precise(DL.getTypeStoreSize(LI->getType())), AATags);
 }
 
 MemoryLocation MemoryLocation::get(const StoreInst *SI) {
@@ -47,7 +48,8 @@ MemoryLocation MemoryLocation::get(const StoreInst *SI) {
   const auto &DL = SI->getModule()->getDataLayout();
 
   return MemoryLocation(SI->getPointerOperand(),
-                        DL.getTypeStoreSize(SI->getValueOperand()->getType()),
+                        LocationSize::precise(DL.getTypeStoreSize(
+                            SI->getValueOperand()->getType())),
                         AATags);
 }
 
@@ -64,9 +66,10 @@ MemoryLocation MemoryLocation::get(const AtomicCmpXchgInst *CXI) {
   CXI->getAAMetadata(AATags);
   const auto &DL = CXI->getModule()->getDataLayout();
 
-  return MemoryLocation(
-      CXI->getPointerOperand(),
-      DL.getTypeStoreSize(CXI->getCompareOperand()->getType()), AATags);
+  return MemoryLocation(CXI->getPointerOperand(),
+                        LocationSize::precise(DL.getTypeStoreSize(
+                            CXI->getCompareOperand()->getType())),
+                        AATags);
 }
 
 MemoryLocation MemoryLocation::get(const AtomicRMWInst *RMWI) {
@@ -75,7 +78,8 @@ MemoryLocation MemoryLocation::get(const AtomicRMWInst *RMWI) {
   const auto &DL = RMWI->getModule()->getDataLayout();
 
   return MemoryLocation(RMWI->getPointerOperand(),
-                        DL.getTypeStoreSize(RMWI->getValOperand()->getType()),
+                        LocationSize::precise(DL.getTypeStoreSize(
+                            RMWI->getValOperand()->getType())),
                         AATags);
 }
 
@@ -88,9 +92,9 @@ MemoryLocation MemoryLocation::getForSource(const AtomicMemTransferInst *MTI) {
 }
 
 MemoryLocation MemoryLocation::getForSource(const AnyMemTransferInst *MTI) {
-  uint64_t Size = MemoryLocation::UnknownSize;
+  auto Size = LocationSize::unknown();
   if (ConstantInt *C = dyn_cast<ConstantInt>(MTI->getLength()))
-    Size = C->getValue().getZExtValue();
+    Size = LocationSize::precise(C->getValue().getZExtValue());
 
   // memcpy/memmove can have AA tags. For memcpy, they apply
   // to both the source and the destination.
@@ -109,9 +113,9 @@ MemoryLocation MemoryLocation::getForDest(const AtomicMemIntrinsic *MI) {
 }
 
 MemoryLocation MemoryLocation::getForDest(const AnyMemIntrinsic *MI) {
-  uint64_t Size = MemoryLocation::UnknownSize;
+  auto Size = LocationSize::unknown();
   if (ConstantInt *C = dyn_cast<ConstantInt>(MI->getLength()))
-    Size = C->getValue().getZExtValue();
+    Size = LocationSize::precise(C->getValue().getZExtValue());
 
   // memcpy/memmove can have AA tags. For memcpy, they apply
   // to both the source and the destination.
@@ -141,7 +145,8 @@ MemoryLocation MemoryLocation::getForArgument(ImmutableCallSite CS,
       assert((ArgIdx == 0 || ArgIdx == 1) &&
              "Invalid argument index for memory intrinsic");
       if (ConstantInt *LenCI = dyn_cast<ConstantInt>(II->getArgOperand(2)))
-        return MemoryLocation(Arg, LenCI->getZExtValue(), AATags);
+        return MemoryLocation(Arg, LocationSize::precise(LenCI->getZExtValue()),
+                              AATags);
       break;
 
     case Intrinsic::lifetime_start:
@@ -149,27 +154,37 @@ MemoryLocation MemoryLocation::getForArgument(ImmutableCallSite CS,
     case Intrinsic::invariant_start:
       assert(ArgIdx == 1 && "Invalid argument index");
       return MemoryLocation(
-          Arg, cast<ConstantInt>(II->getArgOperand(0))->getZExtValue(), AATags);
+          Arg,
+          LocationSize::precise(
+              cast<ConstantInt>(II->getArgOperand(0))->getZExtValue()),
+          AATags);
 
     case Intrinsic::invariant_end:
       // The first argument to an invariant.end is a "descriptor" type (e.g. a
       // pointer to a empty struct) which is never actually dereferenced.
       if (ArgIdx == 0)
-        return MemoryLocation(Arg, 0, AATags);
+        return MemoryLocation(Arg, LocationSize::precise(0), AATags);
       assert(ArgIdx == 2 && "Invalid argument index");
       return MemoryLocation(
-          Arg, cast<ConstantInt>(II->getArgOperand(1))->getZExtValue(), AATags);
+          Arg,
+          LocationSize::precise(
+              cast<ConstantInt>(II->getArgOperand(1))->getZExtValue()),
+          AATags);
 
     case Intrinsic::arm_neon_vld1:
       assert(ArgIdx == 0 && "Invalid argument index");
       // LLVM's vld1 and vst1 intrinsics currently only support a single
       // vector register.
-      return MemoryLocation(Arg, DL.getTypeStoreSize(II->getType()), AATags);
+      return MemoryLocation(
+          Arg, LocationSize::precise(DL.getTypeStoreSize(II->getType())),
+          AATags);
 
     case Intrinsic::arm_neon_vst1:
       assert(ArgIdx == 0 && "Invalid argument index");
-      return MemoryLocation(
-          Arg, DL.getTypeStoreSize(II->getArgOperand(1)->getType()), AATags);
+      return MemoryLocation(Arg,
+                            LocationSize::precise(DL.getTypeStoreSize(
+                                II->getArgOperand(1)->getType())),
+                            AATags);
     }
   }
 
@@ -184,9 +199,10 @@ MemoryLocation MemoryLocation::getForArgument(ImmutableCallSite CS,
     assert((ArgIdx == 0 || ArgIdx == 1) &&
            "Invalid argument index for memset_pattern16");
     if (ArgIdx == 1)
-      return MemoryLocation(Arg, 16, AATags);
+      return MemoryLocation(Arg, LocationSize::precise(16), AATags);
     if (const ConstantInt *LenCI = dyn_cast<ConstantInt>(CS.getArgument(2)))
-      return MemoryLocation(Arg, LenCI->getZExtValue(), AATags);
+      return MemoryLocation(Arg, LocationSize::precise(LenCI->getZExtValue()),
+                            AATags);
   }
   // FIXME: Handle memset_pattern4 and memset_pattern8 also.