David Majnemer 45951a6626 [InstCombine] (mul nsw 1, INT_MIN) != (shl nsw 1, 31) ...

Multiplying INT_MIN by 1 doesn't trigger nsw.  However, shifting 1 into
the sign bit *does* trigger nsw.

llvm-svn: 235250

2015-04-18 04:41:30 +00:00

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