[llvm] X86: Pass instruction to inline asm register printing helpers (PR #219473)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/219473

printAsmMRegister and printAsmVRegister only used the operand to recover its
parent instruction's inline asm dialect. Pass the containing instruction
directly so they no longer depend on MachineOperand::getParent().

Co-authored-by: Claude (Claude-Opus-4.8) <noreply at anthropic.com>

>From a804574ef858299e7c3695f3b287388a75c70708 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Fri, 28 Aug 2026 04:25:03 +0200
Subject: [PATCH] X86: Pass instruction to inline asm register printing helpers

printAsmMRegister and printAsmVRegister only used the operand to recover its
parent instruction's inline asm dialect. Pass the containing instruction
directly so they no longer depend on MachineOperand::getParent().

Co-authored-by: Claude (Claude-Opus-4.8) <noreply at anthropic.com>
---
 llvm/lib/Target/X86/X86AsmPrinter.cpp | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/llvm/lib/Target/X86/X86AsmPrinter.cpp b/llvm/lib/Target/X86/X86AsmPrinter.cpp
index b0ea0850d2785..20911e8d2a37c 100644
--- a/llvm/lib/Target/X86/X86AsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86AsmPrinter.cpp
@@ -673,10 +673,11 @@ void X86AsmPrinter::emitMachOIFuncStubHelperBody(Module &M,
       *Subtarget);
 }
 
-static bool printAsmMRegister(const X86AsmPrinter &P, const MachineOperand &MO,
-                              char Mode, raw_ostream &O) {
+static bool printAsmMRegister(const X86AsmPrinter &P, const MachineInstr &MI,
+                              const MachineOperand &MO, char Mode,
+                              raw_ostream &O) {
   Register Reg = MO.getReg();
-  bool EmitPercent = MO.getParent()->getInlineAsmDialect() == InlineAsm::AD_ATT;
+  bool EmitPercent = MI.getInlineAsmDialect() == InlineAsm::AD_ATT;
 
   if (!X86::GR8RegClass.contains(Reg) &&
       !X86::GR16RegClass.contains(Reg) &&
@@ -717,10 +718,10 @@ static bool printAsmMRegister(const X86AsmPrinter &P, const MachineOperand &MO,
   return false;
 }
 
-static bool printAsmVRegister(const MachineOperand &MO, char Mode,
-                              raw_ostream &O) {
+static bool printAsmVRegister(const MachineInstr &MI, const MachineOperand &MO,
+                              char Mode, raw_ostream &O) {
   Register Reg = MO.getReg();
-  bool EmitPercent = MO.getParent()->getInlineAsmDialect() == InlineAsm::AD_ATT;
+  bool EmitPercent = MI.getInlineAsmDialect() == InlineAsm::AD_ATT;
 
   unsigned Index;
   if (X86::VR128XRegClass.contains(Reg))
@@ -825,7 +826,7 @@ bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
     case 'q': // Print DImode register
     case 'V': // Print native register without '%'
       if (MO.isReg())
-        return printAsmMRegister(*this, MO, ExtraCode[0], O);
+        return printAsmMRegister(*this, *MI, MO, ExtraCode[0], O);
       PrintOperand(MI, OpNo, O);
       return false;
 
@@ -833,7 +834,7 @@ bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
     case 't': // Print V8SFmode register
     case 'g': // Print V16SFmode register
       if (MO.isReg())
-        return printAsmVRegister(MO, ExtraCode[0], O);
+        return printAsmVRegister(*MI, MO, ExtraCode[0], O);
       PrintOperand(MI, OpNo, O);
       return false;