[HLSL/Spir-V] fix for incorrect spir-v on int dot(int, int)

SPIRV/GlslangToSpv.cpp

@@ -6914,6 +6914,17 @@ spv::Id TGlslangToSpvTraverser::createMiscOperation(glslang::TOperator op, spv::
         // We might need the remaining arguments, e.g. in the EOpFrexp case.
         std::vector<spv::Id> callArguments(operands.begin(), operands.begin() + consumedOperands);
         id = builder.createBuiltinCall(typeId, extBuiltins >= 0 ? extBuiltins : stdBuiltins, libCall, callArguments);
+    } else if (opCode == spv::OpDot && !isFloat) {
+        // int dot(int, int)
+        // NOTE: never called for scalar/vector1, this is turned into simple mul before this can be reached
+        const int componentCount = builder.getNumComponents(operands[0]);
+        spv::Id mulOp = builder.createBinOp(spv::OpIMul, builder.getTypeId(operands[0]), operands[0], operands[1]);
+        builder.setPrecision(mulOp, precision);
+        id = builder.createCompositeExtract(mulOp, typeId, 0);
+        for (int i = 1; i < componentCount; ++i) {
+            builder.setPrecision(id, precision);
+            id = builder.createBinOp(spv::OpIAdd, typeId, id, builder.createCompositeExtract(operands[0], typeId, i));
+        }
     } else {
         switch (consumedOperands) {
         case 0:

Test/hlsl.int.dot.frag

+float4 main() : SV_Target {
+  int i = 1;
+  int1 i2 = 2;
+  int2 i3 = 3;
+  int3 i4 = 4;
+  int4 i5 = 5;
+
+  i = dot(i, i);
+  i2 = dot(i2, i2);
+  i3 = dot(i3, i3);
+  i4 = dot(i4, i4);
+  i5 = dot(i5, i5);
+  return i + i2.xxxx + i3.xyxy + i4.xyzx + i5;
+}
\ No newline at end of file

gtests/Hlsl.FromFile.cpp

@@ -400,7 +400,8 @@ INSTANTIATE_TEST_CASE_P(
         {"hlsl.wavequery.frag", "PixelShaderFunction"},
         {"hlsl.wavereduction.comp", "CSMain"},
         {"hlsl.wavevote.comp", "CSMain"},
-        { "hlsl.type.type.conversion.valid.frag", "main" }
+        { "hlsl.type.type.conversion.valid.frag", "main" },
+        {"hlsl.int.dot.frag", "main"}
     }),
     FileNameAsCustomTestSuffix
 );