Files
llvm-6502/lib/CodeGen/SelectionDAG
Pawel Bylica 9fca970c36 Cherry-pick r233351, r233353, r233355: fix PR22304.
Original message from r233351:
Fix a bug in SelectionDAG scheduling backtracking code: PR22304.

It can happen (by line CurSU->isPending = true; // This SU is not in
AvailableQueue right now.) that a SUnit is mark as available but is
not in the AvailableQueue. For SUnit being selected for scheduling
both conditions must be met.

This patch mainly defensively protects from invalid removing a node
from a queue. Sometimes nodes are marked isAvailable but are not in
the queue because they have been defered due to some hazard.

The other two commits move a test from CodeGen/Generic to Codegen/X86.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_36@234303 91177308-0d34-0410-b5e6-96231b3b80d8
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