[PATCH] D34578: cmath: Support clang's -fdelayed-template-parsing

[Duncan P. N. Exon Smith via Phabricator via cfe-commits]

dexonsmith created this revision.

r283051 added some functions to cmath (in namespace std) that have the same name as functions in math.h (in the global namespace).  Clang's limited support for `-fdelayed-template-parsing` chokes on this.  Rename the ones in `cmath` and their uses in `complex` and the test.

(Incidentally, I noticed that r283051 was optimizing the implementation of `<complex>`.  I wonder why we have so much code in that header, instead of calling out to libc's already-optimized `<complex.h>` implementation?)

rdar://problem/32848355


https://reviews.llvm.org/D34578

Files:
  libcxx/include/cmath
  libcxx/include/complex
  libcxx/test/libcxx/numerics/c.math/constexpr-fns.pass.cpp
  libcxx/test/libcxx/numerics/c.math/fdelayed-template-parsing.sh.cpp
  libcxx/utils/libcxx/test/config.py

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