Sanjay Patel f5019e60c7 add the -mrecip driver flag and process its options
This is the front-end counterpart to D8982 (LLVM r238051).

The -mrecip option interface is based on maintaining compatibility with gcc:
https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/i386-and-x86-64-Options.html#index-mrecip_003dopt-1627
https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/RS_002f6000-and-PowerPC-Options.html#index-mrecip-2289

...while adding more functionality (allowing users to specify the number of refinement steps for each
estimate type).

Differential Revision: http://reviews.llvm.org/D8989

llvm-svn: 238055
2015-05-22 21:42:10 +00:00
2015-05-22 02:23:22 +00:00
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