llvm-6502/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp at dbf5f2557e5daa89e51d59b0da3329b58c84e4cc - llvm-6502 - Applefritter: Git

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Evan Cheng e57187cbe3 CreateVirtualRegisters does trivial copy coalescing. If a node def is used by a single CopyToReg, it reuses the virtual register assigned to the CopyToReg. This won't work for SDNode that is a clone or is itself cloned. Disable this optimization for those nodes or it can end up with non-SSA machine instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62356 91177308-0d34-0410-b5e6-96231b3b80d8

2009-01-16 20:57:18 +00:00

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