[PATCH] D37701: AMDGPU: Allow coldcc calls

[Matt Arsenault via Phabricator via llvm-commits]

arsenm updated this revision to Diff 114635.

https://reviews.llvm.org/D37701

Files:
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  test/CodeGen/AMDGPU/calling-conventions.ll


Index: test/CodeGen/AMDGPU/calling-conventions.ll
===================================================================
--- test/CodeGen/AMDGPU/calling-conventions.ll
+++ test/CodeGen/AMDGPU/calling-conventions.ll
@@ -43,3 +43,37 @@
   %add = fadd half %arg0, 1.0
   ret half %add
 }
+
+; GCN-LABEL: {{^}}fastcc:
+; GCN: v_add_f32_e32 v0, 4.0, v0
+define fastcc float @fastcc(float %arg0) #0 {
+  %add = fadd float %arg0, 4.0
+  ret float %add
+}
+
+; GCN-LABEL: {{^}}coldcc:
+; GCN: v_add_f32_e32 v0, 4.0, v0
+define coldcc float @coldcc(float %arg0) #0 {
+ %add = fadd float %arg0, 4.0
+ ret float %add
+}
+
+; GCN-LABEL: {{^}}call_coldcc:
+; GCN: v_mov_b32_e32 v0, 1.0
+; GCN: s_swappc_b64
+define amdgpu_kernel void @call_coldcc() #0 {
+  %val = call float @coldcc(float 1.0)
+  store float %val, float addrspace(1)* undef
+  ret void
+}
+
+; GCN-LABEL: {{^}}call_fastcc:
+; GCN: v_mov_b32_e32 v0, 1.0
+; GCN: s_swappc_b64
+define amdgpu_kernel void @call_fastcc() #0 {
+  %val = call float @fastcc(float 1.0)
+  store float %val, float addrspace(1)* undef
+  ret void
+}
+
+attributes #0 = { nounwind noinline }
\ No newline at end of file
Index: lib/Target/AMDGPU/AMDGPUISelLowering.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -851,6 +851,7 @@
     return CC_AMDGPU;
   case CallingConv::C:
   case CallingConv::Fast:
+  case CallingConv::Cold:
     return CC_AMDGPU_Func;
   default:
     report_fatal_error("Unsupported calling convention.");
@@ -871,6 +872,7 @@
     return RetCC_SI_Shader;
   case CallingConv::C:
   case CallingConv::Fast:
+  case CallingConv::Cold:
     return RetCC_AMDGPU_Func;
   default:
     report_fatal_error("Unsupported calling convention.");


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