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Summary: While instrumenting std::string with asan I discovered that speculative load might load data from poisoned region. Disabling all speculative loads for asan-annotated functions. The test follows the std::string implementation. Corresponding CL in llvm: http://reviews.llvm.org/D13264 Patch by Mike Aizatsky, the review page for the CL is http://reviews.llvm.org/D13265 Reviewers: aizatsky Subscribers: kcc, llvm-commits Differential Revision: http://reviews.llvm.org/D13905 llvm-svn: 250837