class FindBlockDeclRefExprsVals : public StmtVisitor<FindBlockDeclRefExprsVals>{
BumpVector<const VarDecl*> &BEVals;
BumpVectorContext &BC;
+ llvm::DenseMap<const VarDecl*, unsigned> Visited;
public:
FindBlockDeclRefExprsVals(BumpVector<const VarDecl*> &bevals,
BumpVectorContext &bc)
if (Stmt *child = *I)
Visit(child);
}
+
+ void VisitDeclRefExpr(const DeclRefExpr *DR) {
+ // Non-local variables are also directly modified.
+ if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()))
+ if (!VD->hasLocalStorage()) {
+ unsigned &flag = Visited[VD];
+ if (!flag) {
+ flag = 1;
+ BEVals.push_back(VD, BC);
+ }
+ }
+ }
void VisitBlockDeclRefExpr(BlockDeclRefExpr *DR) {
- if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()))
- BEVals.push_back(VD, BC);
+ if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
+ unsigned &flag = Visited[VD];
+ if (!flag) {
+ flag = 1;
+ BEVals.push_back(VD, BC);
+ }
+ }
}
};
} // end anonymous namespace
const VarDecl *VD = *I;
const VarRegion *VR = 0;
- if (!VD->getAttr<BlocksAttr>())
+ if (!VD->getAttr<BlocksAttr>() && VD->hasLocalStorage())
VR = MemMgr.getVarRegion(VD, this);
else {
if (LC)
// by reference.
if (const BlockDataRegion *BR = dyn_cast<BlockDataRegion>(baseR)) {
for (BlockDataRegion::referenced_vars_iterator
- I = BR->referenced_vars_begin(), E = BR->referenced_vars_end() ;
- I != E; ++I) {
- const VarRegion *VR = *I;
- if (VR->getDecl()->getAttr<BlocksAttr>())
+ BI = BR->referenced_vars_begin(), BE = BR->referenced_vars_end() ;
+ BI != BE; ++BI) {
+ const VarRegion *VR = *BI;
+ const VarDecl *VD = VR->getDecl();
+ if (VD->getAttr<BlocksAttr>() || !VD->hasLocalStorage())
AddToWorkList(VR);
}
continue;
typedef void (^RDar7582031CB)(void);
@interface RDar7582031
- rdar7582031:RDar7582031CB;
+- rdar7582031_b:RDar7582031CB;
@end
+// Test with one block.
unsigned rdar7582031(RDar7582031 *o) {
__block unsigned x;
[o rdar7582031:^{ x = 1; }];
return x; // no-warning
}
+// Test with two blocks.
+unsigned long rdar7582031_b(RDar7582031 *o) {
+ __block unsigned y;
+ __block unsigned long x;
+ [o rdar7582031:^{ y = 1; }];
+ [o rdar7582031_b:^{ x = 1LL; }];
+ return x + (unsigned long) y; // no-warning
+}
+
+// Show we get an error when 'o' is null because the message
+// expression has no effect.
+unsigned long rdar7582031_b2(RDar7582031 *o) {
+ __block unsigned y;
+ __block unsigned long x;
+ if (o)
+ return 1;
+ [o rdar7582031:^{ y = 1; }];
+ [o rdar7582031_b:^{ x = 1LL; }];
+ return x + (unsigned long) y; // expected-warning{{The left operand of '+' is a garbage value}}
+}
+
+// Show that we handle static variables also getting invalidated.
+void rdar7582031_aux(void (^)(void));
+RDar7582031 *rdar7582031_aux_2();
+
+unsigned rdar7582031_static() {
+ static RDar7582031 *o = 0;
+ rdar7582031_aux(^{ o = rdar7582031_aux_2(); });
+
+ __block unsigned x;
+ [o rdar7582031:^{ x = 1; }];
+ return x; // no-warning
+}
+
//===----------------------------------------------------------------------===//
// <rdar://problem/7462324> - Test that variables passed using __blocks
// are not treated as being uninitialized.