[AMDGPU] Enable IAS in the AMDGPU backend

[brad]

Summary

Enable IAS in the AMDGPU backend.

[arsenm]

I didn't realize this was off. Can you add some object output run lines to the inline asm tests? I don't think we have any of those

[brad]

In D140658#4016867, @arsenm wrote:

I didn't realize this was off. Can you add some object output run lines to the inline asm tests? I don't think we have any of those

Sorry I'm not sure what you mean by that. Can you please clarify? Do you want to do that? AMDGPU is one of the quite few with IAS disabled in the backend.

[arsenm]

In D140658#4053376, @brad wrote:

In D140658#4016867, @arsenm wrote:

I didn't realize this was off. Can you add some object output run lines to the inline asm tests? I don't think we have any of those

Sorry I'm not sure what you mean by that. Can you please clarify? Do you want to do that? AMDGPU is one of the quite few with IAS disabled in the backend.

I mean this patch has no tests. I assume this would be exercised by using -filetype=obj in a testcase using inline asm

[arsenm]

Should add some -filetype=obj runlines to asm tests, e.g. llvm/test/CodeGen/AMDGPU/inline-asm.ll

[arsenm]

reverse ping?

llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCAsmInfo.cpp

AMDGPUMCAsmInfo::AMDGPUMCAsmInfo(const Triple &TT,
   //===--- Global Variable Emission Directives --------------------------===//
   HasAggressiveSymbolFolding = true;
   COMMDirectiveAlignmentIsInBytes = false;
   HasNoDeadStrip = true;
   //===--- Dwarf Emission Directives -----------------------------------===//
   SupportsDebugInformation = true;
   UsesCFIForDebug = true;
   DwarfRegNumForCFI = true;
-
-  UseIntegratedAssembler = false;
 }
 
 bool AMDGPUMCAsmInfo::shouldOmitSectionDirective(StringRef SectionName) const {
   return SectionName == ".hsatext" || SectionName == ".hsadata_global_agent" ||
          SectionName == ".hsadata_global_program" ||
          SectionName == ".hsarodata_readonly_agent" ||
          MCAsmInfo::shouldOmitSectionDirective(SectionName);
 }