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Matt Arsenault
757bf95c73
Try to use the underlying source registers. This enables legalization in more cases where some irregular operations are widened and others narrowed. This seems to make the test_combines_2 AArch64 test worse, since the MERGE_VALUES has multiple uses. Since this should be required for legalization, a hasOneUse check is probably inappropriate (or maybe should only be used if the merge is legal?). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353121 91177308-0d34-0410-b5e6-96231b3b80d8
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