[analyzer] pr37209: Fix casts of glvalues to references.

Many glvalue expressions aren't of their respective reference type -
they are simply glvalues of their value type.

This was causing problems when we were trying to obtain type of the original
expression while evaluating certain glvalue bit-casts.

Fixed by artificially forging a reference type to provide to the casting
procedure.

Differential Revision: https://reviews.llvm.org/D46224

llvm-svn: 331558

1 files changed, 14 insertions, 0 deletions

diff --git a/clang/test/Analysis/casts.cpp b/clang/test/Analysis/casts.cpp
index f96f19b0ac3..6499b20a79d 100644
--- a/clang/test/Analysis/casts.cpp
+++ b/clang/test/Analysis/casts.cpp
@@ -21,3 +21,17 @@ void intAsBoolAsSwitchCondition(int c) {
       break;
   }
 }
+
+int *&castToIntPtrLValueRef(char *p) {
+  return (int *&)*(int *)p;
+}
+bool testCastToIntPtrLValueRef(char *p, int *s) {
+  return castToIntPtrLValueRef(p) != s; // no-crash
+}
+
+int *&&castToIntPtrRValueRef(char *p) {
+  return (int *&&)*(int *)p;
+}
+bool testCastToIntPtrRValueRef(char *p, int *s) {
+  return castToIntPtrRValueRef(p) != s; // no-crash
+}