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861e8a0eb7
The match pattern in the definition of LXSDX is xoaddr, so the Pseudo instruction XFLOADf64 never gets selected. XFLOADf64 expands to LXSDX/LFDX post RA based on the register pressure. To avoid ambiguity, we need to remove the select pattern for LXSDX, same as what was done for LXSD. STXSDX also have the same issue. Patch by Qing Shan Zhang (steven.zhang). Differential Revision: https://reviews.llvm.org/D47178 llvm-svn: 333150
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