[AMDGPU] Enable changing instprinter's behavior based on the per-function

subtarget

This is a prerequisite for coming waitcnt changes

Differential Revision: https://reviews.llvm.org/D24939



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282489 91177308-0d34-0410-b5e6-96231b3b80d8

Author: kzhuravl

lib/Target/AMDGPU/AMDGPU.td

@@ -349,6 +349,10 @@ def AMDGPUAsmParser : AsmParser {
   let ShouldEmitMatchRegisterName = 0;
 }
 
+def AMDGPUAsmWriter : AsmWriter {
+  int PassSubtarget = 1;
+}
+
 def AMDGPUAsmVariants {
   string Default = "Default";
   int Default_ID = 0;
@@ -390,6 +394,7 @@ def AMDGPU : Target {
                                 VOP3AsmParserVariant,
                                 SDWAAsmParserVariant,
                                 DPPAsmParserVariant];
+  let AssemblyWriters = [AMDGPUAsmWriter];
 }
 
 // Dummy Instruction itineraries for pseudo instructions