For C-like targets, emit resource declarations before other globals (#2843)

* For C-like targets, emit resource declarations before other globals

* Remove unused tests

2 files changed, 43 insertions, 0 deletions

diff --git a/tests/autodiff/inout-custom-derivative.slang b/tests/autodiff/inout-custom-derivative.slang
new file mode 100644
index 000000000..76c9cb74f
--- /dev/null
+++ b/tests/autodiff/inout-custom-derivative.slang
@@ -0,0 +1,35 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+typedef DifferentialPair<float> dpfloat;
+typedef float.Differential dfloat;
+
+[BackwardDerivative(bwd_f)]
+void f(float x, out float y)
+{
+    y = x * x;
+}
+
+void bwd_f(inout DifferentialPair<float> dpx, in float.Differential dy)
+{
+    dpx = DifferentialPair<float>(dpx.p, 2.0 * dpx.p * dy);
+}
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    {
+        float o;
+        f(3.0, o);
+
+        dpfloat dpa = dpfloat(2.0, 1.0);
+        dpfloat dpo = dpfloat(2.0, 1.0);
+        __bwd_diff(f)(dpa, o);
+
+        outputBuffer[0] = o; // Expect: 9
+        outputBuffer[1] = dpa.d; // Expect: 36
+    }
+}
diff --git a/tests/autodiff/inout-custom-derivative.slang.expected.txt b/tests/autodiff/inout-custom-derivative.slang.expected.txt
new file mode 100644
index 000000000..07757c1f5
--- /dev/null
+++ b/tests/autodiff/inout-custom-derivative.slang.expected.txt
@@ -0,0 +1,8 @@
+type: float
+9.000000
+36.000000
+0.000000
+0.000000
+0.000000
+0.000000
+0.000000