[llvm] [AMDGPU] Preserve instruction flags in ILP scheduler (PR #211190)

[Robert Imschweiler via llvm-commits]

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@@ -622,7 +631,8 @@ void GCNIterativeScheduler::scheduleILP(
                                        ST, DynamicVGPRBlockSize) >= TgtOcc) {
         LLVM_DEBUG(dbgs() << ", scheduling minimal register\n");
         scheduleBest(*R);
-      }
+      } else
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ro-i wrote:

should use braces around else if `if` has them

https://github.com/llvm/llvm-project/pull/211190