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103d622517
Adds a test to verify the behavior that r233153 restored: 'optnone' does not spuriously disable the DAG combiner, and in fact there are cases where the DAG combiner must run (even at -O0 or 'optnone') in order for codegen to succeed. Differential Revision: http://reviews.llvm.org/D8614 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233584 91177308-0d34-0410-b5e6-96231b3b80d8
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