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This frequently leads to cases like: ldr xD, [xN, :lo12:var] add xA, xN, :lo12:var ldr xD, [xA, #8] where the ADD would have been needed anyway, and the two distinct addressing modes can prevent the formation of an ldp. Because of how we handle ADRP (aggressively forming an ADRP/ADD pseudo-inst at ISel time), this pattern also results in duplicated ADRP instructions (one on its own to cover the ldr, and one combined with the add). llvm-svn: 223172 |
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