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| author | Evan Cheng <evan.cheng@apple.com> | 2009-01-16 20:57:18 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-01-16 20:57:18 +0000 |
| commit | 968e2e7b3db122ce94cb00857a826edbded2aaed (patch) | |
| tree | ebba35341c7444747467ad41a1753988f5ff759d /llvm/lib/CodeGen/VirtRegMap.cpp | |
| parent | 10401ce2e0b96a488582b1a584b08e54b9e3d66a (diff) | |
| download | bcm5719-llvm-968e2e7b3db122ce94cb00857a826edbded2aaed.tar.gz bcm5719-llvm-968e2e7b3db122ce94cb00857a826edbded2aaed.zip | |
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.
llvm-svn: 62356
Diffstat (limited to 'llvm/lib/CodeGen/VirtRegMap.cpp')
0 files changed, 0 insertions, 0 deletions
