AMDGPU: Add a shader calling convention

This makes it possible to distinguish between mesa shaders
and other kernels even in the presence of compute shaders.

Patch By: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

Differential Revision: http://reviews.llvm.org/D18559

llvm-svn: 265589

1 files changed, 16 insertions, 4 deletions

diff --git a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
index 1f5deae..5e3498f 100644
--- a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
@@ -124,14 +124,26 @@ static unsigned getIntegerAttribute(const Function &F, const char *Name,
   return Result;
 }
 
-unsigned getShaderType(const Function &F) {
-  return getIntegerAttribute(F, "ShaderType", ShaderType::COMPUTE);
-}
-
 unsigned getInitialPSInputAddr(const Function &F) {
   return getIntegerAttribute(F, "InitialPSInputAddr", 0);
 }
 
+bool isShader(CallingConv::ID cc) {
+  switch(cc) {
+    case CallingConv::AMDGPU_VS:
+    case CallingConv::AMDGPU_GS:
+    case CallingConv::AMDGPU_PS:
+    case CallingConv::AMDGPU_CS:
+      return true;
+    default:
+      return false;
+  }
+}
+
+bool isCompute(CallingConv::ID cc) {
+  return !isShader(cc) || cc == CallingConv::AMDGPU_CS;
+}
+
 bool isSI(const MCSubtargetInfo &STI) {
   return STI.getFeatureBits()[AMDGPU::FeatureSouthernIslands];
 }