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d138a7bb3f
Materializing full 64-bit constants on PPC64 can be expensive, requiring up to 5 instructions depending on the locations of the non-zero bits. Sometimes materializing the bit-reversed constant, and then flipping the bits, requires fewer instructions than the direct method. If so, do that instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225132 91177308-0d34-0410-b5e6-96231b3b80d8 |
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