[PATCH] D80834: [AArch64] Fix CollectLOH creating an AdrpAdd LOH when there's a live used reg between the two instructions.

[Jessica Paquette via Phabricator via llvm-commits]

paquette added inline comments.


================
Comment at: llvm/test/CodeGen/AArch64/loh-use-between-adrp-add.mir:26-29
+    renamable $x15 = ADRP target-flags(aarch64-page) @rrdpb
+    STRXui renamable $x12, killed renamable $x11, 1 :: (store 8)
+    renamable $x11 = ADDXri killed renamable $x15, target-flags(aarch64-pageoff, aarch64-nc) @rrdpb, 0
+    STRXui renamable $x11, killed renamable $x11, 0
----------------
Will this patch prevent us from making the LOH if we have something like this?

```
$add_def = ... stuff ...
$adrp_def = adrp  ...
$add_def = add ...
```

If I understand correctly, it looks like the patch doesn't check if the use is actually between the adrp and add?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80834/new/

https://reviews.llvm.org/D80834