Merging r340959:

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r340959 | mareko | 2018-08-29 22:03:00 +0200 (Wed, 29 Aug 2018) | 9 lines

AMDGPU: Handle 32-bit address wraparounds for SMRD opcodes

Summary: This fixes GPU hangs with OpenGL bindless handle arithmetic.

Reviewers: arsenm, nhaehnle

Subscribers: kzhuravl, jvesely, wdng, yaxunl, dstuttard, tpr, t-tye, llvm-commits

Differential Revision: https://reviews.llvm.org/D51203
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_70@341351 91177308-0d34-0410-b5e6-96231b3b80d8