Akira Hatanaka 168d4e5b20 [mips] Implement the following optimizations using dominance information to ...

make PIC calls a little more efficient:

1. Remove instructions setting up $gp if it is known that a function has been
   called at least once.
2. Save the address of a called function in a register instead of loading
   it from the GOT at every call site.

llvm-svn: 195892

2013-11-27 23:38:42 +00:00

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