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In LVI, calculate the range of extractvalue(op.with.overflow(%x, %y), 0) as the range of op(%x, %y). This is mainly useful in conjunction with D60650: If the result of the operation is extracted in a branch guarded against overflow, then the value of %x will be appropriately constrained and the result range of the operation will be calculated taking that into account. Differential Revision: https://reviews.llvm.org/D60656 llvm-svn: 361693 |
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