Jim Grosbach 95b38aea95 Switch TargetRegisterInfo::getSubReg() to use a lookup table.
Instead of nested switch statements, use a lookup table. On ARM, this replaces
a 23k (x86_64 release build) function with a 16k table. Its not unlikely to
be faster, as well.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151751 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-29 20:31:17 +00:00
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