Move getVariableSize from Verifier.cpp into DIVariable::getSize() (NFC)

llvm-svn: 319125
diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 5bb1f84..084eaba 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -4498,29 +4498,6 @@
   verifyFnArgs(DII);
 }
 
-static uint64_t getVariableSize(const DIVariable &V) {
-  // Be careful of broken types (checked elsewhere).
-  const Metadata *RawType = V.getRawType();
-  while (RawType) {
-    // Try to get the size directly.
-    if (auto *T = dyn_cast<DIType>(RawType))
-      if (uint64_t Size = T->getSizeInBits())
-        return Size;
-
-    if (auto *DT = dyn_cast<DIDerivedType>(RawType)) {
-      // Look at the base type.
-      RawType = DT->getRawBaseType();
-      continue;
-    }
-
-    // Missing type or size.
-    break;
-  }
-
-  // Fail gracefully.
-  return 0;
-}
-
 void Verifier::verifyFragmentExpression(const DbgInfoIntrinsic &I) {
   DILocalVariable *V = dyn_cast_or_null<DILocalVariable>(I.getRawVariable());
   DIExpression *E = dyn_cast_or_null<DIExpression>(I.getRawExpression());
@@ -4552,15 +4529,15 @@
                                         ValueOrMetadata *Desc) {
   // If there's no size, the type is broken, but that should be checked
   // elsewhere.
-  uint64_t VarSize = getVariableSize(V);
+  auto VarSize = V.getSizeInBits();
   if (!VarSize)
     return;
 
   unsigned FragSize = Fragment.SizeInBits;
   unsigned FragOffset = Fragment.OffsetInBits;
-  AssertDI(FragSize + FragOffset <= VarSize,
+  AssertDI(FragSize + FragOffset <= *VarSize,
          "fragment is larger than or outside of variable", Desc, &V);
-  AssertDI(FragSize != VarSize, "fragment covers entire variable", Desc, &V);
+  AssertDI(FragSize != *VarSize, "fragment covers entire variable", Desc, &V);
 }
 
 void Verifier::verifyFnArgs(const DbgInfoIntrinsic &I) {