From: Ted Kremenek <kremenek@apple.com>
Date: Thu, 17 Mar 2011 03:06:11 +0000 (+0000)
Subject: Extend -Wuninitialized to support vector types.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1cbc31515e9b979f55178ffd4587e8671f7ebbfa;p=clang

Extend -Wuninitialized to support vector types.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127794 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Analysis/UninitializedValues.cpp b/lib/Analysis/UninitializedValues.cpp
index ae0dbf10e8..c2ac6310ba 100644
--- a/lib/Analysis/UninitializedValues.cpp
+++ b/lib/Analysis/UninitializedValues.cpp
@@ -26,9 +26,12 @@
 using namespace clang;
 
 static bool isTrackedVar(const VarDecl *vd, const DeclContext *dc) {
-  return vd->isLocalVarDecl() && !vd->hasGlobalStorage() && 
-         vd->getType()->isScalarType() &&
-         vd->getDeclContext() == dc;
+  if (vd->isLocalVarDecl() && !vd->hasGlobalStorage() &&
+      vd->getDeclContext() == dc) {
+    QualType ty = vd->getType();
+    return ty->isScalarType() || ty->isVectorType();
+  }
+  return false;
 }
 
 //------------------------------------------------------------------------====//
diff --git a/test/Sema/uninit-variables-vectors.c b/test/Sema/uninit-variables-vectors.c
new file mode 100644
index 0000000000..7197fb6327
--- /dev/null
+++ b/test/Sema/uninit-variables-vectors.c
@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -fsyntax-only -Wuninitialized -fsyntax-only %s -verify
+
+#include <xmmintrin.h>
+
+void test1(float *input) {
+  __m128 x, y, z, w, X; // expected-note {{variable 'x' is declared here}} expected-note {{variable 'y' is declared here}} expected-note {{variable 'w' is declared here}}  expected-note {{variable 'z' is declared here}}
+  x = _mm_xor_ps(x,x); // expected-warning {{variable 'x' is possibly uninitialized when used here}}
+  y = _mm_xor_ps(y,y); // expected-warning {{variable 'y' is possibly uninitialized when used here}}
+  z = _mm_xor_ps(z,z); // expected-warning {{variable 'z' is possibly uninitialized when used here}}
+  w = _mm_xor_ps(w,w); // expected-warning {{variable 'w' is possibly uninitialized when used here}}
+  X = _mm_loadu_ps(&input[0]);
+  X = _mm_xor_ps(X,X); // no-warning
+}
+