[Triple] Add AMDPAL operating system type

Summary:
This operating system type represents the AMDGPU PAL runtime, and will
be required by the AMDGPU backend in order to generate correct code for
this runtime.

Currently it generates the same code as not specifying an OS at all.
That will change in future commits.

Patch from Tim Corringham.

Subscribers: arsenm, nhaehnle

Differential Revision: https://reviews.llvm.org/D37380

llvm-svn: 314500

2 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index 8dc582ab95a..69c99ac907a 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -207,6 +207,7 @@ StringRef Triple::getOSTypeName(OSType Kind) {
   case WatchOS: return "watchos";
   case Mesa3D: return "mesa3d";
   case Contiki: return "contiki";
+  case AMDPAL: return "amdpal";
   }
 
   llvm_unreachable("Invalid OSType");
@@ -499,6 +500,7 @@ static Triple::OSType parseOS(StringRef OSName) {
     .StartsWith("watchos", Triple::WatchOS)
     .StartsWith("mesa3d", Triple::Mesa3D)
     .StartsWith("contiki", Triple::Contiki)
+    .StartsWith("amdpal", Triple::AMDPAL)
     .Default(Triple::UnknownOS);
 }
 
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
index 7e7a09648ed..0f725c181b7 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
@@ -214,6 +214,10 @@ public:
            TargetTriple.getEnvironmentName() == "amdgizcl";
   }
 
+  bool isAmdPalOS() const {
+    return TargetTriple.getOS() == Triple::AMDPAL;
+  }
+
   Generation getGeneration() const {
     return Gen;
   }