AMDGPU: Partially fix implicit.buffer.ptr intrinsic handling

This should not be treated as a different version of
private_segment_buffer. These are distinct things with
different uses and register classes, and requires the
function argument info to have more context about the
function's type and environment.

Also add missing test coverage for the intrinsic, and
emit an error for HSA. This also encovers that the intrinsic
is broken unless there happen to be stack objects.

llvm-svn: 306264

1 files changed, 4 insertions, 3 deletions

diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
index 8fed6d5f971..600cc886cb5 100644
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
@@ -197,12 +197,13 @@ public:
     WORKGROUP_ID_Y      = 11,
     WORKGROUP_ID_Z      = 12,
     PRIVATE_SEGMENT_WAVE_BYTE_OFFSET = 14,
+    IMPLICIT_BUFFER_PTR = 15,
 
     // VGPRS:
-    FIRST_VGPR_VALUE    = 15,
+    FIRST_VGPR_VALUE    = 16,
     WORKITEM_ID_X       = FIRST_VGPR_VALUE,
-    WORKITEM_ID_Y       = 16,
-    WORKITEM_ID_Z       = 17
+    WORKITEM_ID_Y       = 17,
+    WORKITEM_ID_Z       = 18
   };
 
   /// \brief Returns the physical register that \p Value is stored in.