tree cc26ce74146b052bea87a9ca28314767d6cef72b
parent b6714227eda5d499f7667fc865f931126a8dc488
author Shuxin Yang <shuxin.llvm@gmail.com> 1357690421 +0000
committer Shuxin Yang <shuxin.llvm@gmail.com> 1357690421 +0000

Consider expression "0.0 - X" as the negation of X if
  - this expression is explicitly marked no-signed-zero, or
  - no-signed-zero of this expression can be derived from some context.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171922 91177308-0d34-0410-b5e6-96231b3b80d8