MC: Remove MCSubtargetInfo() default constructor

Force all creators of `MCSubtargetInfo` to immediately initialize it,
merging the default constructor and the initializer into an initializing
constructor.  Besides cleaning up the code a little, this makes it clear
that the initializer is never called again later.

Out-of-tree backends need a trivial change: instead of calling:

    auto *X = new MCSubtargetInfo();
    InitXYZMCSubtargetInfo(X, ...);
    return X;

they should call:

    return createXYZMCSubtargetInfoImpl(...);

There's no real functionality change here.

llvm-svn: 241957

1 files changed, 1 insertions, 3 deletions

diff --git a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCTargetDesc.cpp b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCTargetDesc.cpp
index 24976b46fae..c709741f377 100644
--- a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCTargetDesc.cpp
+++ b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCTargetDesc.cpp
@@ -52,9 +52,7 @@ static MCRegisterInfo *createAMDGPUMCRegisterInfo(const Triple &TT) {
 
 static MCSubtargetInfo *
 createAMDGPUMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
-  MCSubtargetInfo * X = new MCSubtargetInfo();
-  InitAMDGPUMCSubtargetInfo(X, TT, CPU, FS);
-  return X;
+  return createAMDGPUMCSubtargetInfoImpl(TT, CPU, FS);
 }
 
 static MCCodeGenInfo *createAMDGPUMCCodeGenInfo(const Triple &TT,