Merging r367675 and r367823:

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r367675 | stulova | 2019-08-02 13:19:35 +0200 (Fri, 02 Aug 2019) | 10 lines

[OpenCL] Allow OpenCL C style vector initialization in C++

Allow creating vector literals from other vectors.

 float4 a = (float4)(1.0f, 2.0f, 3.0f, 4.0f);
 float4 v = (float4)(a.s23, a.s01);

Differential revision: https://reviews.llvm.org/D65286


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r367823 | stulova | 2019-08-05 11:50:28 +0200 (Mon, 05 Aug 2019) | 6 lines

[OpenCL] Fix vector literal test broken in rL367675.

Avoid checking alignment unnecessary that is not portable
among targets.


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llvm-svn: 367987