radeon/llvm: More comments and cleanups

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeon/R600ISelLowering.h b/src/gallium/drivers/radeon/R600ISelLowering.h
index fdd552a172d..6296145f668 100644
--- a/src/gallium/drivers/radeon/R600ISelLowering.h
+++ b/src/gallium/drivers/radeon/R600ISelLowering.h
@@ -30,6 +30,10 @@ public:
 private:
   const R600InstrInfo * TII;
 
+  /// lowerImplicitParameter - Each OpenCL kernel has nine implicit parameters
+  /// that are stored in the first nine dwords of a Vertex Buffer.  These
+  /// implicit parameters are represented by pseudo instructions, which are
+  /// lowered to VTX_READ instructions by this function. 
   void lowerImplicitParameter(MachineInstr *MI, MachineBasicBlock &BB,
       MachineRegisterInfo & MRI, unsigned dword_offset) const;