[llvm] [X86][GlobalISel] Support globals in pic mode (PR #170038)

[Matt Arsenault via llvm-commits]

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@@ -997,6 +1001,33 @@ bool X86LegalizerInfo::legalizeSETROUNDING(MachineInstr &MI,
   return true;
 }
 
+bool X86LegalizerInfo::legalizeGLOBAL_VALUE(MachineInstr &MI,
+                                            MachineRegisterInfo &MRI,
+                                            LegalizerHelper &Helper) const {
+  auto GV = MI.getOperand(1).getGlobal();
+  Register Dst = MI.getOperand(0).getReg();
+  LLT DstTy = MRI.getType(Dst);
+  auto GVOpFlags = Subtarget.classifyGlobalReference(GV);
+
+  // For stub references (GOT/PLT), we need G_WRAPPER_RIP + load
+  if (isGlobalStubReference(GVOpFlags)) {
+    MachineIRBuilder &MIRBuilder = Helper.MIRBuilder;
+    MachineFunction &MF = MIRBuilder.getMF();
+
+    auto StubAddr = MRI.createGenericVirtualRegister(DstTy);
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arsenm wrote:

No auto 

https://github.com/llvm/llvm-project/pull/170038