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6b05686283
functions that don't write can't leak a pointer except through the return value, so a void readonly function is implicitly nocapture. Test these, and add a test that verifies that f1 calling f2 with an otherwise dead pointer gets both of them marked nocapture. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61552 91177308-0d34-0410-b5e6-96231b3b80d8