[AMDGPU] Remove SIEncodingFamily.GFX10_B

[rampitec]

Summary

It turns to be not needed anymore.

[arsenm]

Is there a missing c++ change? What was this for before?

[rampitec]

In D88520#2302085, @arsenm wrote:

Is there a missing c++ change? What was this for before?

The c++ value was removed long time ago, so it is out of sync with td. But this encoding is not used by any instructions for a long time too. This is just a remaining garbage after encoding uses were removed.

llvm/lib/Target/AMDGPU/SIInstrInfo.td

def SIEncodingFamily {
   int SI = 0;
   int VI = 1;
   int SDWA = 2;
   int SDWA9 = 3;
   int GFX80 = 4;
   int GFX9 = 5;
   int GFX10 = 6;
   int SDWA10 = 7;
-  int GFX10_B = 8;
 }
 
 //===----------------------------------------------------------------------===//
 // SI DAG Nodes
 //===----------------------------------------------------------------------===//
 
 def AMDGPUclamp : SDNode<"AMDGPUISD::CLAMP", SDTFPUnaryOp>;
 
let ValueCols = [[!cast<string>(SIEncodingFamily.SI)],
                    [!cast<string>(SIEncodingFamily.SDWA9)],
                    // GFX80 encoding is added to work around a multiple matching
                    // issue for buffer instructions with unpacked d16 data. This
                    // does not actually change the encoding, and thus may be
                    // removed later.
                    [!cast<string>(SIEncodingFamily.GFX80)],
                    [!cast<string>(SIEncodingFamily.GFX9)],
                    [!cast<string>(SIEncodingFamily.GFX10)],
-                   [!cast<string>(SIEncodingFamily.SDWA10)],
-                   [!cast<string>(SIEncodingFamily.GFX10_B)]];
+                   [!cast<string>(SIEncodingFamily.SDWA10)]];
 }
 
 // Get equivalent SOPK instruction.
 def getSOPKOp : InstrMapping {
   let FilterClass = "SOPKInstTable";
   let RowFields = ["BaseCmpOp"];
   let ColFields = ["IsSOPK"];
   let KeyCol = ["0"];