[PATCH] change DAG's JumpIsExpensive check for x86 (PR23827)

[Sanjay Patel]

Thanks, Chandler.

From: https://llvm.org/bugs/show_bug.cgi?id=23827#c6
"We should not encode some magical meaning to a bitwise-and"

I'd always assumed that a bitwise op caused type promotion of the bool, so it was a legitimate way to tell the compiler to avoid the branch. I've followed up with a message to the dev lists.


http://reviews.llvm.org/D10741

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