[clang] [llvm] [PowerPC][AIX] 64-bit large code-model support for toc-data (PR #90619)

[Chen Zheng via cfe-commits]

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@@ -1292,8 +1291,9 @@ void PPCAsmPrinter::emitInstruction(const MachineInstr *MI) {
 
     unsigned Op = MI->getOpcode();
 
-    // Change the opcode to load address for tocdata
-    TmpInst.setOpcode(Op == PPC::ADDItocL8 ? PPC::ADDI8 : PPC::LA);
+    // Change the opcode to load address for toc data.
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chenzheng1030 wrote:

nit: maybe we can also add a comment here saying that for `ADDItocL`, it is only used for 32-bit toc data on AIX, so always using LA?

https://github.com/llvm/llvm-project/pull/90619