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When extracting a set of blocks make sure to inherit all of the target dependent attributes to make sure that the function will be valid for lowering. One example is the "target-features" attribute for x86, if the extracted region has functionality that relies on a specific feature it will fail to be lowered. This also allows for extracted functions to be valid for inlining, at least back into the parent function, as the target attributes are tested when inlining for compatibility. Patch by River Riddle! Differential Revision: https://reviews.llvm.org/D22713 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277315 91177308-0d34-0410-b5e6-96231b3b80d8