From ff107eed1546bcdb1b1ce2ffafbb7b10ea2b2a30 Mon Sep 17 00:00:00 2001
From: Bjorn Pettersson <bjorn.a.pettersson@ericsson.com>
Date: Thu, 20 Aug 2020 14:36:20 +0200
Subject: [PATCH] [AArch64] Update a code comment incorrectly referring to
 zero_reg. NFC

The getSrcFromCopy helper nowadays return a MachineOperand pointer,
so talking about zero_reg was incorrect as it nowadays return
a nullptr when not finding a copy like instruction.
---
 llvm/lib/Target/AArch64/AArch64AdvSIMDScalarPass.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AArch64/AArch64AdvSIMDScalarPass.cpp b/llvm/lib/Target/AArch64/AArch64AdvSIMDScalarPass.cpp
index 981b366c14b1..c996d2df8c38 100644
--- a/llvm/lib/Target/AArch64/AArch64AdvSIMDScalarPass.cpp
+++ b/llvm/lib/Target/AArch64/AArch64AdvSIMDScalarPass.cpp
@@ -123,7 +123,7 @@ static bool isFPR64(unsigned Reg, unsigned SubReg,
 }
 
 // getSrcFromCopy - Get the original source register for a GPR64 <--> FPR64
-// copy instruction. Return zero_reg if the instruction is not a copy.
+// copy instruction. Return nullptr if the instruction is not a copy.
 static MachineOperand *getSrcFromCopy(MachineInstr *MI,
                                       const MachineRegisterInfo *MRI,
                                       unsigned &SubReg) {