[PATCH] D21854: Remove AND mask of bottom 6 bits when result is used for SystemZ shift/rotate

Wed Jul 6 07:59:06 PDT 2016

colpell updated this revision to Diff 62868.
colpell added a comment.

If the AND value has more than one use, generate a new shift/rotate node with the AND's first operand rather than removing the AND completely. Also add tests for this situation.

http://reviews.llvm.org/D21854

Files:
  lib/Target/SystemZ/SystemZISelLowering.cpp
  lib/Target/SystemZ/SystemZISelLowering.h
  test/CodeGen/SystemZ/rot-01.ll
  test/CodeGen/SystemZ/rot-02.ll
  test/CodeGen/SystemZ/shift-12.ll

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