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ba51ae6864
Our register allocation has become better recently, it seems, and is now starting to generate cross-block copies into inflated register classes. These copies are not transformed into subregister insertions/extractions by the PPCVSXCopy class, and so need to be handled directly by PPCInstrInfo::copyPhysReg. The code to do this was *almost* there, but not quite (it was unnecessarily restricting itself to only the direct sub/super-register-class case (not copying between, for example, something in VRRC and the lower-half of VSRC which are super-registers of F8RC). Triggering this behavior manually is difficult; I'm including two bugpoint-reduced test cases from the test suite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229457 91177308-0d34-0410-b5e6-96231b3b80d8 |
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