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- Implement copying ASR to/from GPR regs. - Mark ASRs as non-allocatable, so it won't try to arbitrarily use them inappropriately. - Instead of inserting explicit WRASR/RDASR nodes in the MUL/DIV routines, just do normal register copies. - Also...mark div as using Y, not just writing it. Added a test case with some code which previously died with an assertion failure (with -O0), or produced wrong code (otherwise). (Third time's the charm?) Differential Revision: http://reviews.llvm.org/D10401 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241686 91177308-0d34-0410-b5e6-96231b3b80d8
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