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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 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 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 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 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: since the undefined operation "can't happen", the optimizer can assume that
it occurs in dead code. it occurs in dead code.