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1154be8198
Add custom lowering code for signed multiply instruction selection, because the default FastISel instruction selection for ISD::MUL will use unsigned multiply for the i8 type and signed multiply for all other types. This would set the incorrect flags for the overflow check. This fixes <rdar://problem/17549300> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212493 91177308-0d34-0410-b5e6-96231b3b80d8
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