From 6bde08536655dadca4156ca42d4c6f19f52fde98 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@google.com>
Date: Tue, 26 Jan 2021 20:00:16 -0800
Subject: [PATCH] [AMDGPU] Forward-declare TargetRegisterClass (NFC)

AMDGPUInstructionSelector.h needs TargetRegisterClass but relies on a
forward declaration of TargetRegisterClass in InstructionSelector.h.
This patch adds a forward declaration right in
AMDGPUInstructionSelector.h.

While we are at it, this patch removes the one in
InstructionSelector.h, where it is unnecessary.
---
 llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h | 1 -
 llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h         | 1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h b/llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h
index 5b8243a..3fbc75e 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h
@@ -39,7 +39,6 @@ class MachineOperand;
 class MachineRegisterInfo;
 class RegisterBankInfo;
 class TargetInstrInfo;
-class TargetRegisterClass;
 class TargetRegisterInfo;
 
 /// Container class for CodeGen predicate results.
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
index d70f180..b250390 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
@@ -45,6 +45,7 @@ class RegisterBank;
 class SIInstrInfo;
 class SIMachineFunctionInfo;
 class SIRegisterInfo;
+class TargetRegisterClass;
 
 class AMDGPUInstructionSelector final : public InstructionSelector {
 private:
-- 
2.7.4