[llvm] [AMDGPU] Do not coerce values defined by terminators in LiveRegOptimizer (PR #218868)

[Matt Arsenault via llvm-commits]

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@@ -385,6 +385,9 @@ bool LiveRegOptimizer::optimizeLiveType(
 
   // Coerce and track the defs.
   for (Instruction *D : Defs) {
+    // Terminators can't be coerced in-block, so skip them.
+    if (D->isTerminator())
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arsenm wrote:

Maybe avoid collecting these in the first place?

https://github.com/llvm/llvm-project/pull/218868