AMDGPU: Remove debugger related subtarget features

As far as I know these aren't needed anymore.

llvm-svn: 354634
diff --git a/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp b/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
index 22dc4c1..78e88ab 100644
--- a/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
@@ -87,33 +87,23 @@
     }
   }
 
-  if (ST.debuggerEmitPrologue()) {
-    // Enable everything.
+  if (F.hasFnAttribute("amdgpu-work-group-id-x"))
     WorkGroupIDX = true;
+
+  if (F.hasFnAttribute("amdgpu-work-group-id-y"))
     WorkGroupIDY = true;
+
+  if (F.hasFnAttribute("amdgpu-work-group-id-z"))
     WorkGroupIDZ = true;
+
+  if (F.hasFnAttribute("amdgpu-work-item-id-x"))
     WorkItemIDX = true;
+
+  if (F.hasFnAttribute("amdgpu-work-item-id-y"))
     WorkItemIDY = true;
+
+  if (F.hasFnAttribute("amdgpu-work-item-id-z"))
     WorkItemIDZ = true;
-  } else {
-    if (F.hasFnAttribute("amdgpu-work-group-id-x"))
-      WorkGroupIDX = true;
-
-    if (F.hasFnAttribute("amdgpu-work-group-id-y"))
-      WorkGroupIDY = true;
-
-    if (F.hasFnAttribute("amdgpu-work-group-id-z"))
-      WorkGroupIDZ = true;
-
-    if (F.hasFnAttribute("amdgpu-work-item-id-x"))
-      WorkItemIDX = true;
-
-    if (F.hasFnAttribute("amdgpu-work-item-id-y"))
-      WorkItemIDY = true;
-
-    if (F.hasFnAttribute("amdgpu-work-item-id-z"))
-      WorkItemIDZ = true;
-  }
 
   const MachineFrameInfo &FrameInfo = MF.getFrameInfo();
   bool HasStackObjects = FrameInfo.hasStackObjects();