[llvm-branch-commits] [llvm] [CodeGen][StaticDataSplitter]Support constant pool partitioning (PR #129781)

[Wei Xiao via llvm-branch-commits]

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@@ -112,21 +117,52 @@ bool StaticDataSplitter::runOnMachineFunction(MachineFunction &MF) {
   return Changed;
 }
 
+const Constant *
+StaticDataSplitter::getConstant(const MachineOperand &Op,
+                                const TargetMachine &TM,
+                                const MachineConstantPool *MCP) {
+  if (!Op.isGlobal() && !Op.isCPI())
+    return nullptr;
+
+  if (Op.isGlobal()) {
+    // Find global variables with local linkage.
+    const GlobalVariable *GV = getLocalLinkageGlobalVariable(Op.getGlobal());
+    // Skip 'special' global variables conservatively because they are
+    // often handled specially, and skip those not in static data
+    // sections.
+    if (!GV || GV->getName().starts_with("llvm.") ||
+        !inStaticDataSection(GV, TM))
+      return nullptr;
+    return GV;
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williamweixiao wrote:

What's the motivation to handle "GlobalVariable" here? Any test to cover it?

https://github.com/llvm/llvm-project/pull/129781