[PATCH] New warning for mismatch between not and and/or operators.

[Richard Trieu]

Emit a warning when a bitwise not operator is used with a logical and/or operator or a logical not with bitwise and/or is detected.  Also emit fix-it hints to change the not operator and to change the and/or operator.

Examples:
int x = ~y | ~z;
Fixed with | => ||

bool a = ~b && !c
Fixed with ~b => !b

No false positives found, although the impact of using a bitwise operator in place of a logical operator is lower than the other way round.

http://reviews.llvm.org/D5765

Files:
  include/clang/Basic/DiagnosticGroups.td
  include/clang/Basic/DiagnosticSemaKinds.td
  lib/Sema/SemaExpr.cpp
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