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asan: kernel: make no_sanitize("address") attribute work with -fsanitize=kernel…

Authored by vitalybuka on Apr 9 2018, 1:10 PM.

Description

asan: kernel: make no_sanitize("address") attribute work with -fsanitize=kernel-address

Summary:
Right now to disable -fsanitize=kernel-address instrumentation, one needs to use no_sanitize("kernel-address"). Make either no_sanitize("address") or no_sanitize("kernel-address") disable both ASan and KASan instrumentation. Also remove redundant test.

Patch by Andrey Konovalov

Reviewers: eugenis, kcc, glider, dvyukov, vitalybuka

Reviewed By: eugenis, vitalybuka

Differential Revision: https://reviews.llvm.org/D44981

llvm-svn: 329612