[llvm] [SPIRV] Added Packed Vector Format for SPV_KHR_integer_dot_product (PR #160088)

[via llvm-commits]

https://github.com/EbinJose2002 updated https://github.com/llvm/llvm-project/pull/160088

>From ff7c38e62ecd28160277ce8e543dc4fc943525ec Mon Sep 17 00:00:00 2001
From: EbinJose2002 <ebin.jose at multicorewareinc.com>
Date: Thu, 24 Jul 2025 15:44:57 +0530
Subject: [PATCH] Added Packed Vector Format for Integer dot product

---
 .../SPIRV/MCTargetDesc/SPIRVInstPrinter.cpp   | 15 ++++++++++++++
 llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp       |  2 +-
 .../lib/Target/SPIRV/SPIRVSymbolicOperands.td | 20 +++++++++++++++++++
 ..._KHR_integer_dot_product_OCLtoSPIRV_int.ll | 18 ++++++++---------
 4 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.cpp b/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.cpp
index 1e3f7fc0070ff..776208bd3e693 100644
--- a/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.cpp
+++ b/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.cpp
@@ -269,6 +269,21 @@ void SPIRVInstPrinter::printInst(const MCInst *MI, uint64_t Address,
           }
           break;
         }
+        case SPIRV::OpSDot:
+        case SPIRV::OpUDot:
+        case SPIRV::OpSUDot:
+        case SPIRV::OpSDotAccSat:
+        case SPIRV::OpUDotAccSat:
+        case SPIRV::OpSUDotAccSat: {
+          const unsigned NumOps = MI->getNumOperands();
+          if (NumOps > NumFixedOps) {
+            OS << ' ';
+            printSymbolicOperand<OperandCategory::PackedVectorFormatsOperand>(
+                MI, NumOps - 1, OS);
+            break;
+          }
+          break;
+        }
         default:
           printRemainingVariableOps(MI, NumFixedOps, OS);
           break;
diff --git a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
index 2abd9d36f7606..86f445954400e 100644
--- a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
@@ -1778,7 +1778,7 @@ static bool generateDotOrFMulInst(const StringRef DemangledCall,
   // Add Packed Vector Format for Integer dot product builtins if arguments are
   // scalar
   if (!IsVec && OC != SPIRV::OpFMulS)
-    MIB.addImm(0);
+    MIB.addImm(SPIRV::PackedVectorFormat4x8Bit);
 
   return true;
 }
diff --git a/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td b/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td
index ed933f872d136..89b716e5704ed 100644
--- a/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td
+++ b/llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td
@@ -211,6 +211,7 @@ def CooperativeMatrixOperandsOperand : OperandCategory;
 def SpecConstantOpOperandsOperand : OperandCategory;
 def MatrixMultiplyAccumulateOperandsOperand : OperandCategory;
 def FPEncodingOperand : OperandCategory;
+def PackedVectorFormatsOperand : OperandCategory;
 
 //===----------------------------------------------------------------------===//
 // Definition of the Environments
@@ -2022,3 +2023,22 @@ multiclass FPEncodingOperand<bits<32> value, list<Extension> reqExtensions>{
 }
 
 defm BFloat16KHR : FPEncodingOperand<0, []>;
+
+def PackedVectorFormats : GenericEnum, Operand<i32> {
+  let FilterClass = "PackedVectorFormats";
+  let NameField = "Name";
+  let ValueField = "Value";
+  let PrintMethod = !strconcat("printSymbolicOperand<OperandCategory::", FilterClass, "Operand>");
+}
+
+class PackedVectorFormats<string name, bits<32> value> {
+  string Name = name;
+  bits<32> Value = value;
+}
+
+multiclass PackedVectorFormatsOperand<bits<32> value, list<Extension> reqExtensions> {
+  def NAME : BuiltIn<NAME, value>;
+  defm : SymbolicOperandWithRequirements<PackedVectorFormatsOperand, value, NAME, 0, 0, reqExtensions, [], []>;
+}
+
+defm PackedVectorFormat4x8Bit : PackedVectorFormatsOperand<0, [SPV_KHR_integer_dot_product]>;
diff --git a/llvm/test/CodeGen/SPIRV/extensions/SPV_KHR_integer_dot_product/SPV_KHR_integer_dot_product_OCLtoSPIRV_int.ll b/llvm/test/CodeGen/SPIRV/extensions/SPV_KHR_integer_dot_product/SPV_KHR_integer_dot_product_OCLtoSPIRV_int.ll
index 284f5c34671b7..52ddc39265442 100644
--- a/llvm/test/CodeGen/SPIRV/extensions/SPV_KHR_integer_dot_product/SPV_KHR_integer_dot_product_OCLtoSPIRV_int.ll
+++ b/llvm/test/CodeGen/SPIRV/extensions/SPV_KHR_integer_dot_product/SPV_KHR_integer_dot_product_OCLtoSPIRV_int.ll
@@ -13,15 +13,15 @@
 ; CHECK: Name %[[#SignedB:]] "ib"
 ; CHECK: Name %[[#UnsignedB:]] "ub"
 
-; CHECK: SDot %[[#]] %[[#SignedA]] %[[#SignedB]] 0
-; CHECK: SUDot %[[#]] %[[#SignedA]] %[[#UnsignedB]] 0
-; CHECK: SUDot %[[#]] %[[#SignedB]] %[[#UnsignedA]] 0
-; CHECK: UDot %[[#]] %[[#UnsignedA]] %[[#UnsignedB]] 0
-
-; CHECK: SDotAccSat %[[#]] %[[#SignedA]] %[[#SignedB]] %[[#]] 0
-; CHECK: SUDotAccSat %[[#]] %[[#SignedA]] %[[#UnsignedB]] %[[#]] 0
-; CHECK: SUDotAccSat %[[#]] %[[#SignedB]] %[[#UnsignedA]] %[[#]] 0
-; CHECK: UDotAccSat %[[#]] %[[#UnsignedA]] %[[#UnsignedB]] %[[#]] 0
+; CHECK: SDot %[[#]] %[[#SignedA]] %[[#SignedB]] PackedVectorFormat4x8Bit
+; CHECK: SUDot %[[#]] %[[#SignedA]] %[[#UnsignedB]] PackedVectorFormat4x8Bit
+; CHECK: SUDot %[[#]] %[[#SignedB]] %[[#UnsignedA]] PackedVectorFormat4x8Bit
+; CHECK: UDot %[[#]] %[[#UnsignedA]] %[[#UnsignedB]] PackedVectorFormat4x8Bit
+
+; CHECK: SDotAccSat %[[#]] %[[#SignedA]] %[[#SignedB]] %[[#]] PackedVectorFormat4x8Bit
+; CHECK: SUDotAccSat %[[#]] %[[#SignedA]] %[[#UnsignedB]] %[[#]] PackedVectorFormat4x8Bit
+; CHECK: SUDotAccSat %[[#]] %[[#SignedB]] %[[#UnsignedA]] %[[#]] PackedVectorFormat4x8Bit
+; CHECK: UDotAccSat %[[#]] %[[#UnsignedA]] %[[#UnsignedB]] %[[#]] PackedVectorFormat4x8Bit
 
 define spir_kernel void @test(i32 %ia, i32 %ua, i32 %ib, i32 %ub, i32 %ires, i32 %ures) {
 entry: