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Fix bug in vector initializer when initializing a vector with another vector.

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Add test case.

llvm-svn: 129617
This commit is contained in:
Tanya Lattner
2011-04-15 22:42:59 +00:00
parent 2cb3aa30dd
commit 5ac257d738
2 changed files with 18 additions and 0 deletions
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6
clang/lib/AST/ExprConstant.cpp
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@@ -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);

12
clang/test/CodeGenOpenCL/2011-04-15-vec-init-from-vec.cl Normal file
View File

@@ -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}}};
}