[llvm] [RISCV] Implement tail call optimization in machine outliner (PR #115297)

[Paul Kirth via llvm-commits]

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@@ -3041,19 +3073,29 @@ void RISCVInstrInfo::buildOutlinedFrame(
     }
   }
 
+  if (OF.FrameConstructionID == MachineOutlinerTailCall)
+    return;
+
   MBB.addLiveIn(RISCV::X5);
 
   // Add in a return instruction to the end of the outlined frame.
   MBB.insert(MBB.end(), BuildMI(MF, DebugLoc(), get(RISCV::JALR))
-      .addReg(RISCV::X0, RegState::Define)
-      .addReg(RISCV::X5)
-      .addImm(0));
+                            .addReg(RISCV::X0, RegState::Define)
+                            .addReg(RISCV::X5)
+                            .addImm(0));
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ilovepi wrote:

is this intentional?

https://github.com/llvm/llvm-project/pull/115297