Index: llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
===================================================================
--- llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
+++ llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
@@ -48,6 +48,13 @@
     if (OtherOpcode == Instr->Description.getOpcode())
       continue;
     const Instruction &OtherInstr = State.getIC().getInstr(OtherOpcode);
+    const MCInstrDesc &OtherInstrDesc = OtherInstr.Description;
+    // Ignore instructions that we cannot run.
+    if (OtherInstrDesc.isPseudo() ||
+        OtherInstrDesc.isBranch() || OtherInstrDesc.isIndirectBranch() ||
+        OtherInstrDesc.isCall() || OtherInstrDesc.isReturn()) {
+          continue;
+    }
     if (OtherInstr.hasMemoryOperands())
       continue;
     if (Instr->hasAliasingRegistersThrough(OtherInstr, ForbiddenRegisters))