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another typo

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81243 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2009-09-08 19:45:34 +00:00
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@ -2136,7 +2136,7 @@ can be constant folded to undef because the undef could be an SNaN, and fdiv is
not (currently) defined on SNaN's. However, in the second example, we can make
a more aggressive assumption: because the undef is allowed to be an arbitrary
value, we are allowed to assume that it could be zero. Since a divide by zero
it has <em>undefined behavior</em>, we are allowed to assume that the operation
has <em>undefined behavior</em>, we are allowed to assume that the operation
does not execute at all. This allows us to delete the divide and all code after
it: since the undefined operation "can't happen", the optimizer can assume that
it occurs in dead code.