From 368ec3116ea0f10f44acbf76b5dc9e34d6ff3d32 Mon Sep 17 00:00:00 2001
From: Edward Liu <shiqiu1105@gmail.com>
Date: Mon, 14 Nov 2022 12:08:01 -0800
Subject: Minimum binary arithmetic reverse autodiff working. (#2514)

* Initial plumbing of backward autodiff in the frontend.

* More plumbing.

* Initial reverse autodiff working.

* Bug fixes.

* Misc.

* Remove redundant code.

* More clean up.

* Misc.

* Rebase and add backward diff test.

* Disable test.

* Clean up.

* Minor fix.

Co-authored-by: Yong He <yhe@nvidia.com>
---
 source/slang/slang-ir.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'source/slang/slang-ir.cpp')

diff --git a/source/slang/slang-ir.cpp b/source/slang/slang-ir.cpp
index 9d538a774..6112beaf2 100644
--- a/source/slang/slang-ir.cpp
+++ b/source/slang/slang-ir.cpp
@@ -3109,6 +3109,17 @@ namespace Slang
         return inst;
     }
 
+    IRInst* IRBuilder::emitBackwardDifferentiateInst(IRType* type, IRInst* baseFn)
+    {
+        auto inst = createInst<IRBackwardDifferentiate>(
+            this,
+            kIROp_BackwardDifferentiate,
+            type,
+            baseFn);
+        addInst(inst);
+        return inst;
+    }
+
     IRInst* IRBuilder::emitMakeDifferentialPair(IRType* type, IRInst* primal, IRInst* differential)
     {
         IRInst* args[] = {primal, differential};
@@ -4556,6 +4567,17 @@ namespace Slang
         return inst;
     }
 
+    IRInst* IRBuilder::emitNeg(IRType* type, IRInst* value)
+    {
+        auto inst = createInst<IRInst>(
+            this,
+            kIROp_Neg,
+            type,
+            value);
+        addInst(inst);
+        return inst;
+    }
+
     IRInst* IRBuilder::emitAdd(IRType* type, IRInst* left, IRInst* right)
     {
         auto inst = createInst<IRInst>(
-- 
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