tree d740e9900fb7194b55fd94300060c90705f5450c
parent d356001c0982bb499efd1207cec652e8711ee385
author Andrew Scheidecker <andrew@scheidecker.net> 1550611314 +0000
committer Andrew Scheidecker <andrew@scheidecker.net> 1550611314 +0000

[ConstantFold] Fix misfolding fcmp of a ConstantExpr NaN with itself.

The code incorrectly inferred that the relationship of a constant expression
to itself is FCMP_OEQ (ordered and equal), when it's actually FCMP_UEQ
(unordered *or* equal). This change corrects that, and adds some more limited
folds that can be done in this case.

Differential revision: https://reviews.llvm.org/D51216


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354381 91177308-0d34-0410-b5e6-96231b3b80d8