Add `[ForwardDerivativeOf]` attribute. (#2501)

* Add [ForwardDerivativeOf] attribute.

* Fix handling around phi nodes.

* Fixes.

* Remove IR opcode for ForwardDerivativeOfDecoration.

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/autodiff/dstdlib.slang b/tests/autodiff/dstdlib.slang
index 247200511..b96cd3c51 100644
--- a/tests/autodiff/dstdlib.slang
+++ b/tests/autodiff/dstdlib.slang
@@ -9,19 +9,19 @@ typedef DifferentialPair<float> dpfloat;
 [ForwardDifferentiable]
 float f(float x)
 {
-    return dstd.exp(x);
+    return exp(x);
 }
 
 [ForwardDifferentiable]
 float g(float x)
 {
-    return dstd.sin(x);
+    return sin(x);
 }
 
 [ForwardDifferentiable]
 float h(float x)
 {
-    return dstd.cos(x);
+    return cos(x);
 }
 
 [numthreads(1, 1, 1)]