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90c14fcb7e
offset accumulation to use a boring APInt instead of ConstantExprs. I didn't go all the way to an 'int64_t' because I wanted APInt to handle any magic required to properly wrap the arithmetic when the pointer width is <64 bits. If there is a significant penalty from using APInt here, first off WTF, and secondly let me know and I'll do the math by hand. I've left one layer still operating w/ ConstantExpr because it makes the interface quite a bit simpler, and that one isn't iterative so has much lower cost. I suppose this may potentially speed up some strang compilation situations, but I don't really expect much. It should have no functional impact either way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152590 91177308-0d34-0410-b5e6-96231b3b80d8
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