Richard Smith 6b53e224eb Split -fsanitize=bounds to -fsanitize=array-bounds (for the frontend-inserted ...

check using the ubsan runtime) and -fsanitize=local-bounds (for the middle-end
check which inserts traps).

Remove -fsanitize=local-bounds from -fsanitize=undefined. It does not produce
useful diagnostics and has false positives (PR17635), and is not a good
compromise position between UBSan's checks and ASan's checks.

Map -fbounds-checking to -fsanitize=local-bounds to restore Clang's historical
behavior for that flag.

llvm-svn: 193205

2013-10-22 22:51:04 +00:00

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