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/NVPTX/MCTargetDesc/NVPTXMCTargetDesc.cpp b/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXMCTargetDesc.cpp
index 68ec818c02e..ad7302037ca 100644
--- a/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXMCTargetDesc.cpp
+++ b/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXMCTargetDesc.cpp
@@ -46,9 +46,7 @@ static MCRegisterInfo *createNVPTXMCRegisterInfo(const Triple &TT) {
 
 static MCSubtargetInfo *
 createNVPTXMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
-  MCSubtargetInfo *X = new MCSubtargetInfo();
-  InitNVPTXMCSubtargetInfo(X, TT, CPU, FS);
-  return X;
+  return createNVPTXMCSubtargetInfoImpl(TT, CPU, FS);
 }
 
 static MCCodeGenInfo *createNVPTXMCCodeGenInfo(const Triple &TT,