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b14220e075
Currently, for x86 and x86_64 triples, "+sse" and "+sse2" are appended to `Features` vector of `TargetOptions` unconditionally. This vector is later reset in `TargetInfo::CreateTargetInfo` and filled using info from `FeaturesAsWritten` vector, so previous modifications of the `Features` vector have no effect. For x86_64 triple, we append "sse2" unconditionally in `X86TargetInfo::initFeatureMap`, so despite the `Features` vector reset, we still have the desired sse features enabled. The corresponding code in `X86TargetInfo::initFeatureMap` is marked as FIXME, so we should not probably rely on it and should set desired features properly in `ClangExpressionParser`. This patch changes the vector the features are appended to from `Features` to `FeaturesAsWritten`. It's not reset later and is used to compute resulting `Features` vector.