Jakob Stoklund Olesen d92280013d Add TRI::getCommonSuperRegClass(). ... This function is a generalization of getMatchingSuperRegClass() to the symmetric case where both sides are using a sub-register index. It will find a super-register class and sub-register indexes that make this diagram commute: PreA SuperRC ----------> RCA | | | | PreB | | SubA | | | | V V RCB ----------> SubRC SubB This can be used to coalesce copies like: %vreg1:sub16 = COPY %vreg2:sub16; GR64:%vreg1, GR32: %vreg2 llvm-svn: 156317		2012-05-07 19:14:58 +00:00
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llvm	Add TRI::getCommonSuperRegClass().	2012-05-07 19:14:58 +00:00
llvm-c	[llvm-c] Make a few function declarations proper prototypes	2012-05-02 16:15:32 +00:00