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Chris Lattner
939274fcfd
Prefer to allocate V2-V5 before V0,V1. This lets us generate code like this:
vspltisw v2, -12 vrlw v2, v2, v2 instead of: vspltisw v0, -12 vrlw v2, v0, v0 when a function is returning a value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27771 91177308-0d34-0410-b5e6-96231b3b80d8
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These instructions always return a packed vector. Improve the class definitions to expose this fact.
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