[AMDGPU] clang-tidy: define trivial constructors with = default. NFC.

Author: jayfoad

llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp

@@ -136,7 +136,7 @@ class AMDGPULibCalls {
   }
 
 public:
-  AMDGPULibCalls() {}
+  AMDGPULibCalls() = default;
 
   bool fold(CallInst *CI);
 

llvm/lib/Target/AMDGPU/AMDGPUPrintfRuntimeBinding.cpp

@@ -50,7 +50,7 @@ class AMDGPUPrintfRuntimeBinding final : public ModulePass {
 
 class AMDGPUPrintfRuntimeBindingImpl {
 public:
-  AMDGPUPrintfRuntimeBindingImpl() {}
+  AMDGPUPrintfRuntimeBindingImpl() = default;
   bool run(Module &M);
 
 private:

llvm/lib/Target/AMDGPU/GCNCreateVOPD.cpp

@@ -43,7 +43,7 @@ class GCNCreateVOPD : public MachineFunctionPass {
 private:
     class VOPDCombineInfo {
     public:
-      VOPDCombineInfo() {}
+      VOPDCombineInfo() = default;
       VOPDCombineInfo(MachineInstr *First, MachineInstr *Second)
           : FirstMI(First), SecondMI(Second) {}
 

llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp

@@ -451,7 +451,7 @@ class WaitcntGenerator {
   bool OptNone;
 
 public:
-  WaitcntGenerator() {}
+  WaitcntGenerator() = default;
   WaitcntGenerator(const MachineFunction &MF, InstCounterType MaxCounter)
       : ST(&MF.getSubtarget<GCNSubtarget>()), TII(ST->getInstrInfo()),
         IV(AMDGPU::getIsaVersion(ST->getCPU())), MaxCounter(MaxCounter),
@@ -510,7 +510,7 @@ class WaitcntGenerator {
 
 class WaitcntGeneratorPreGFX12 : public WaitcntGenerator {
 public:
-  WaitcntGeneratorPreGFX12() {}
+  WaitcntGeneratorPreGFX12() = default;
   WaitcntGeneratorPreGFX12(const MachineFunction &MF)
       : WaitcntGenerator(MF, NUM_NORMAL_INST_CNTS) {}
 
@@ -545,7 +545,7 @@ class WaitcntGeneratorPreGFX12 : public WaitcntGenerator {
 
 class WaitcntGeneratorGFX12Plus : public WaitcntGenerator {
 public:
-  WaitcntGeneratorGFX12Plus() {}
+  WaitcntGeneratorGFX12Plus() = default;
   WaitcntGeneratorGFX12Plus(const MachineFunction &MF,
                             InstCounterType MaxCounter)
       : WaitcntGenerator(MF, MaxCounter) {}