Fix coopvector neg intrinsic.

source/slang/hlsl.meta.slang

@@ -25101,7 +25101,7 @@ struct CoopVec<T : __BuiltinArithmeticType, let N : int> : IArray<T>, IArithmeti
     }
 
     __intrinsic_op($(kIROp_Neg))
-    This __pureNeg(This other);
+    static This __pureNeg(This other);
 
     /// Returns a new cooperative vector where each component has its sign negated.
     /// @return A new cooperative vector containing the negated values.

tests/cooperative-vector/neg.slang

@@ -0,0 +1,27 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-vk -render-feature cooperative-vector -output-using-type
+//DISABLE_TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-dx12 -render-feature cooperative-vector -dx12-experimental -use-dxil -output-using-type -profile cs_6_9 -Xslang... -Xdxc -Vd -X.
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-cpu -output-using-type
+
+// CHECK: type: int32_t
+// CHECK-NEXT: -1
+// CHECK-NEXT: -2
+// CHECK-NEXT: -3
+// CHECK-NEXT: -4
+// CHECK-NEXT: -5
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int32_t> outputBuffer;
+
+//TEST_INPUT:ubuffer(data=[1 2 3 4 5], stride=4),name=input1
+ByteAddressBuffer input1;
+
+[numthreads(1, 1, 1)]
+void computeMain()
+{
+    CoopVec<int, 5> vec1 = coopVecLoad<5, int32_t>(input1);
+
+    let result = -vec1;
+
+    for(int i = 0; i < result.getCount(); ++i)
+        outputBuffer[i] = result[i];
+}