From: Tanya Lattner <tonic@nondot.org>
Date: Fri, 15 Apr 2011 22:42:59 +0000 (+0000)
Subject: Fix bug in vector initializer when initializing a vector with another vector.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b92ae0e31126e5630d7022f2d6abe7eed2e17746;p=clang

Fix bug in vector initializer when initializing a vector with another vector.
Add test case.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129617 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index 0ec122dc35..14a1222cad 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -841,6 +841,12 @@ VectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) {
   // becomes every element of the vector, not just the first.
   // This is the behavior described in the IBM AltiVec documentation.
   if (NumInits == 1) {
+    
+    // Handle the case where the vector is initialized by a another 
+    // vector (OpenCL 6.1.6).
+    if (E->getInit(0)->getType()->isVectorType())
+      return this->Visit(const_cast<Expr*>(E->getInit(0)));
+    
     APValue InitValue;
     if (EltTy->isIntegerType()) {
       llvm::APSInt sInt(32);
diff --git a/test/CodeGenOpenCL/2011-04-15-vec-init-from-vec.cl b/test/CodeGenOpenCL/2011-04-15-vec-init-from-vec.cl
new file mode 100644
index 0000000000..8454b17cf5
--- /dev/null
+++ b/test/CodeGenOpenCL/2011-04-15-vec-init-from-vec.cl
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 %s -emit-llvm -o %t
+
+typedef __attribute__((ext_vector_type(8)))  unsigned char uchar8;
+typedef __attribute__((ext_vector_type(4)))  unsigned long ulong4;
+typedef __attribute__((ext_vector_type(16))) unsigned char uchar16;
+
+// OpenCL allows vectors to be initialized by vectors Handle bug in
+// VisitInitListExpr for this case below.
+void foo( ulong4 v )
+{
+  uchar8 val[4] = {{(uchar8){((uchar16)(v.lo)).lo}}};
+}
\ No newline at end of file