[llvm] [AMDGPU] Avoid put implicit_def into bundle that break reg's liveness (PR #142563)

[Jay Foad via llvm-commits]

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@@ -165,8 +182,10 @@ void llvm::finalizeBundle(MachineBasicBlock &MBB,
         }
       }
 
-      if (!MO.isDead() && Reg.isPhysical())
-        LocalDefs.insert_range(TRI->subregs(Reg));
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jayfoad wrote:

This part is really nice since it avoids adding lots of redundant defs of subregisters to the BUNDLE. This is responsible for most of the test case diffs.

https://github.com/llvm/llvm-project/pull/142563