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Matt Arsenault
556b1b79ec
AMDGPU: Fix producing saveexec when the copy is spilled
If the register from the copy from exec was spilled, the copy before the spill was deleted leaving a spill of undefined register verifier error and miscompiling. Check for other use instructions of the copy register. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318132 91177308-0d34-0410-b5e6-96231b3b80d8
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