Do not model loads from complex types, since we don't accurately model the imaginary and real parts yet.
Fixes false positive reported in <rdar://problem/12964481>.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171987 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Core/RegionStore.cpp b/lib/StaticAnalyzer/Core/RegionStore.cpp
index 9d66c16..ffdb971 100644
--- a/lib/StaticAnalyzer/Core/RegionStore.cpp
+++ b/lib/StaticAnalyzer/Core/RegionStore.cpp
@@ -1133,6 +1133,11 @@
const TypedValueRegion *R = cast<TypedValueRegion>(MR);
QualType RTy = R->getValueType();
+ // FIXME: we do not yet model the parts of a complex type, so treat the
+ // whole thing as "unknown".
+ if (RTy->isAnyComplexType())
+ return UnknownVal();
+
// FIXME: We should eventually handle funny addressing. e.g.:
//
// int x = ...;
diff --git a/test/Analysis/misc-ps-region-store.cpp b/test/Analysis/misc-ps-region-store.cpp
index 7b7b8bd..de70d3b 100644
--- a/test/Analysis/misc-ps-region-store.cpp
+++ b/test/Analysis/misc-ps-region-store.cpp
@@ -705,3 +705,19 @@
*p = 0xDEADBEEF; // no-warning
}
}
+
+// The analyzer currently does not model complex types. Test that the load
+// from 'x' is not flagged as being uninitialized.
+typedef __complex__ float _ComplexT;
+void rdar12964481(_ComplexT *y) {
+ _ComplexT x;
+ __real__ x = 1.0;
+ __imag__ x = 1.0;
+ *y *= x; // no-warning
+}
+void rdar12964481_b(_ComplexT *y) {
+ _ComplexT x;
+ // Eventually this should be a warning.
+ *y *= x; // no-warning
+}
+
