Fix a couple bugs:
- NonLoc::MakeVal() would use sizeof(unsigned) (literally) instead of consulting
ASTContext for the size (in bits) of 'int'. While it worked, it was a
conflation of concepts and using ASTContext.IntTy is 100% correct.
- RegionStore::getSizeInElements() no longer assumes that a VarRegion has the
type "ConstantArray", and handles the case when uses use ordinary variables
as if they were arrays.
- Fixed ElementRegion::getRValueType() to just return the rvalue type of its
"array region" in the case the array didn't have ArrayType.
- All of this fixes <rdar://problem/6541136>
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63347 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/RegionStore.cpp b/lib/Analysis/RegionStore.cpp
index e50b0ab..8d36d10 100644
--- a/lib/Analysis/RegionStore.cpp
+++ b/lib/Analysis/RegionStore.cpp
@@ -403,20 +403,27 @@
const MemRegion* R) {
if (const VarRegion* VR = dyn_cast<VarRegion>(R)) {
// Get the type of the variable.
- QualType T = VR->getRValueType(getContext());
+ QualType T = VR->getDesugaredRValueType(getContext());
- // It must be of array type.
- const ConstantArrayType* CAT = cast<ConstantArrayType>(T.getTypePtr());
-
- // return the size as signed integer.
- return NonLoc::MakeVal(getBasicVals(), CAT->getSize(), false);
+ // FIXME: Handle variable-length arrays.
+ if (isa<VariableArrayType>(T))
+ return UnknownVal();
+
+ if (const ConstantArrayType* CAT = dyn_cast<ConstantArrayType>(T)) {
+ // return the size as signed integer.
+ return NonLoc::MakeVal(getBasicVals(), CAT->getSize(), false);
+ }
+
+ // Clients can use ordinary variables as if they were arrays. These
+ // essentially are arrays of size 1.
+ return NonLoc::MakeIntVal(getBasicVals(), 1, false);
}
if (const StringRegion* SR = dyn_cast<StringRegion>(R)) {
const StringLiteral* Str = SR->getStringLiteral();
// We intentionally made the size value signed because it participates in
// operations with signed indices.
- return NonLoc::MakeVal(getBasicVals(), Str->getByteLength() + 1, false);
+ return NonLoc::MakeIntVal(getBasicVals(), Str->getByteLength()+1, false);
}
if (const AnonTypedRegion* ATR = dyn_cast<AnonTypedRegion>(R)) {
@@ -880,8 +887,8 @@
// When we are binding the whole array, it always has default value 0.
GRStateRef state(St, StateMgr);
- St = state.set<RegionDefaultValue>(R, NonLoc::MakeVal(getBasicVals(), 0,
- false));
+ St = state.set<RegionDefaultValue>(R, NonLoc::MakeIntVal(getBasicVals(), 0,
+ false));
Store store = St->getStore();
@@ -961,8 +968,8 @@
// struct decl. In this case, mark the region as having default value.
if (VI == VE) {
GRStateRef state(St, StateMgr);
- St = state.set<RegionDefaultValue>(R, NonLoc::MakeVal(getBasicVals(), 0,
- false));
+ const NonLoc& Idx = NonLoc::MakeIntVal(getBasicVals(), 0, false);
+ St = state.set<RegionDefaultValue>(R, Idx);
break;
}