Augment -ftrapv to check for divide by zero, mod by zero, and INT_MIN % -1.
Augment -ftrapv to check for divide by zero, mod by zero, and INT_MIN % -1.

Patch by John Regehr!



git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@113705 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang