[AMDGPU] Correct the handling of inlineasm output registers.
Summary:
- There's a regression due to the cross-block RC assignment. Use the
proper way to derive the output register RC in inline asm.
Reviewers: rampitec, alex-t
Subscribers: arsenm, kzhuravl, jvesely, wdng, nhaehnle, dstuttard, tpr, t-tye, eraman, hiraditya, llvm-commits, yaxunl
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D62537
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@361868
91177308-0d34-0410-b5e6-
96231b3b80d8
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