[llvm] [PowerPC] 32-bit large code-model support for toc-data (PR #85129)

[Chen Zheng via llvm-commits]

================
@@ -1147,15 +1147,28 @@ void PPCAsmPrinter::emitInstruction(const MachineInstr *MI) {
 
     MCSymbolRefExpr::VariantKind VK = GetVKForMO(MO);
 
-    // Always use TOC on AIX. Map the global address operand to be a reference
-    // to the TOC entry we will synthesize later. 'TOCEntry' is a label used to
-    // reference the storage allocated in the TOC which contains the address of
-    // 'MOSymbol'.
-    MCSymbol *TOCEntry =
-        lookUpOrCreateTOCEntry(MOSymbol, getTOCEntryTypeForMO(MO), VK);
-    const MCExpr *Exp = MCSymbolRefExpr::create(TOCEntry,
-                                                MCSymbolRefExpr::VK_PPC_U,
-                                                OutContext);
+    // If the symbol isn't toc-data then use the TOC on AIX.
+    // Map the global address operand to be a reference to the TOC entry we
+    // will synthesize later. 'TOCEntry' is a label used to reference the
+    // storage allocated in the TOC which contains the address of 'MOSymbol'.
+    // If the toc-data attribute is used, the TOC entry contains the data
+    // rather than the address of the MOSymbol.
+    auto isSymbolTD = [](const MachineOperand &MO) {
+      if (!MO.isGlobal())
+        return false;
+
+      const GlobalVariable *GV = dyn_cast<GlobalVariable>(MO.getGlobal());
+      if (!GV)
+        return false;
+
+      return GV->hasAttribute("toc-data");
+    };
+
+    if (!isSymbolTD(MO))
----------------
chenzheng1030 wrote:

format related:
since the lambda function `isSymbolTD` is only used once, can we use anonymous lambda function in the if body? Like:
```
if ([](const MachineOperand &MO){}(MO)) {
}
```

https://github.com/llvm/llvm-project/pull/85129