[AMDGPU] Use GenericTable to classify DGEMM

Since there is a table introduced for MAI instructions extend it
to use for DGEMM classification.

Differential Revision: https://reviews.llvm.org/D122337

llvm/lib/Target/AMDGPU/GCNHazardRecognizer.cpp

@@ -116,12 +116,7 @@ static bool isSMovRel(unsigned Opcode) {
 }
 
 static bool isDGEMM(unsigned Opcode) {
-  return Opcode == AMDGPU::V_MFMA_F64_4X4X4F64_e64 ||
-         Opcode == AMDGPU::V_MFMA_F64_4X4X4F64_vgprcd_e64 ||
-         Opcode == AMDGPU::V_MFMA_F64_16X16X4F64_e64 ||
-         Opcode == AMDGPU::V_MFMA_F64_16X16X4F64_vgprcd_e64 ||
-         Opcode == AMDGPU::V_MFMA_F64_16X16X4F64_mac_e64 ||
-         Opcode == AMDGPU::V_MFMA_F64_16X16X4F64_mac_vgprcd_e64;
+  return AMDGPU::getMAIIsDGEMM(Opcode);
 }
 
 static bool isXDL(const GCNSubtarget &ST, const MachineInstr &MI) {

llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp

@@ -343,6 +343,11 @@ bool getVOP3IsSingle(unsigned Opc) {
   return Info ? Info->IsSingle : false;
 }
 
+bool getMAIIsDGEMM(unsigned Opc) {
+  const MAIInstInfo *Info = getMAIInstInfoHelper(Opc);
+  return Info ? Info->is_dgemm : false;
+}
+
 bool getMAIIsGFX940XDL(unsigned Opc) {
   const MAIInstInfo *Info = getMAIInstInfoHelper(Opc);
   return Info ? Info->is_gfx940_xdl : false;

llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h

@@ -70,6 +70,7 @@ struct GcnBufferFormatInfo {
 
 struct MAIInstInfo {
   uint16_t Opcode;
+  bool is_dgemm;
   bool is_gfx940_xdl;
 };
 
@@ -450,6 +451,10 @@ bool getVOP2IsSingle(unsigned Opc);
 LLVM_READONLY
 bool getVOP3IsSingle(unsigned Opc);
 
+/// Returns true if MAI operation is a double precision GEMM.
+LLVM_READONLY
+bool getMAIIsDGEMM(unsigned Opc);
+
 LLVM_READONLY
 bool getMAIIsGFX940XDL(unsigned Opc);
 

llvm/lib/Target/AMDGPU/VOP3PInstructions.td

@@ -487,6 +487,7 @@ let isAsCheapAsAMove = 1, isReMaterializable = 1 in {
 class MAIInst<string OpName, VOPProfile P, SDPatternOperator node>
   : VOP3InstBase<OpName, P, node> {
   Instruction Opcode = !cast<Instruction>(NAME);
+  bit is_dgemm = 0;
   bit is_gfx940_xdl = 0;
 }
 
@@ -559,8 +560,10 @@ let Predicates = [isGFX90APlus] in {
   defm V_MFMA_F32_16X16X16BF16_1K : MAIInst<"v_mfma_f32_16x16x16bf16_1k", "F32_V4I16_X4",   int_amdgcn_mfma_f32_16x16x16bf16_1k>;
   }
 
+  let is_dgemm = 1 in {
   defm V_MFMA_F64_16X16X4F64      : MAIInst<"v_mfma_f64_16x16x4f64",      "F64_16X16X4F64", int_amdgcn_mfma_f64_16x16x4f64>;
   defm V_MFMA_F64_4X4X4F64        : MAIInst<"v_mfma_f64_4x4x4f64",        "F64_4X4X4F64",   int_amdgcn_mfma_f64_4x4x4f64>;
+  }
 } // End Predicates = [isGFX90APlus]
 
 let Predicates = [isGFX940Plus], is_gfx940_xdl = 1 in {
@@ -590,7 +593,7 @@ def MAIInstInfoTable : GenericTable {
   let FilterClass = "MAIInst";
   let CppTypeName = "MAIInstInfo";
   let Fields = [
-    "Opcode", "is_gfx940_xdl"
+    "Opcode", "is_dgemm", "is_gfx940_xdl"
   ];
 
   let PrimaryKey = ["Opcode"];