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Bob Wilson d4d40670e8 Refactor target hook for tail duplication as requested by Chris.
Make tail duplication of indirect branches much more aggressive (for targets
that indicate that it is profitable), based on further experience with
this transformation.  I compiled 3 large applications with and without
this more aggressive tail duplication and measured minimal changes in code
size.  ("size" on Darwin seems to round the text size up to the nearest
page boundary, so I can only say that any code size increase was less than
one 4k page.) Radar 7421267.

llvm-svn: 89814
2009-11-24 23:35:49 +00:00
clang Convert test case to FileCheck to test the behavior of the nil-receiver checker when the code is targetted for either Tiger or Leopard. 2009-11-24 22:56:53 +00:00
compiler-rt Use __USER_LABEL_PREFIX__ so that we don't add a _ prefix on ELF. 2009-11-09 14:27:04 +00:00
llvm Refactor target hook for tail duplication as requested by Chris. 2009-11-24 23:35:49 +00:00