[PATCH] D48154: [VirtRegRewriter] Avoid clobbering registers when expanding copy bundles

[LuoYuanke via Phabricator via llvm-commits]

LuoYuanke added inline comments.
Herald added projects: LLVM, All.


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Comment at: llvm/trunk/test/CodeGen/AArch64/overlapping-copy-bundle-cycle.mir:12
+    $q0_q1_q2_q3 = IMPLICIT_DEF
+    $q1_q2_q3 = COPY $q0_q1_q2 {
+      $q2_q3_q4 = COPY $q1_q2_q3
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Anyone knows how this case happen in register allocation? Does RA respect the possible register overlap issue of bundle instruction during the register allocation?


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D48154/new/

https://reviews.llvm.org/D48154