Duncan Sands 117feba971 Teach getCastOpcode about element-by-element vector casts. For example, "trunc" ... can be used to turn a <4 x i64> into a <4 x i32> but getCastOpcode would assert if you passed these types to it. Note that this strictly extends the previous functionality: if getCastOpcode previously accepted two vector types (i.e. didn't assert) then it still will and returns the same opcode (BitCast). That's because before it would only accept vectors with the same bitwidth, and the new code only touches vectors with the same length. However if two vectors have both the same bitwidth and the same length then their element types have the same bitwidth, so the new logic will return BitCast as before. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131530 91177308-0d34-0410-b5e6-96231b3b80d8		2011-05-18 07:13:41 +00:00
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VMCore	Teach getCastOpcode about element-by-element vector casts. For example, "trunc"	2011-05-18 07:13:41 +00:00
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