From 41e7e565eb3dfa13562cbfa3e8641874c2c6d66c Mon Sep 17 00:00:00 2001
From: Sai Praveen Bangaru <31557731+saipraveenb25@users.noreply.github.com>
Date: Fri, 4 Apr 2025 14:12:27 -0400
Subject: Add a loop analysis step to infer the exit values of loop phi
 parameters. (#6696)

* Initial loop analysis pass

* More changes for a single-pass implication propagation

* Update slang-ir-autodiff-loop-analysis.cpp

* Cleanup + new system for loop analysis

* Fixup bugs in loop analysis

* Remove some relation types to simplify the analysis. Add test

* Remove unused

* Address comments

* Fix issue with continue loops

* Update reverse-loop-exit-value-inference-1.slang

* Update reverse-continue-loop.slang
---
 tests/autodiff/reverse-loop.slang | 46 ---------------------------------------
 1 file changed, 46 deletions(-)
 delete mode 100644 tests/autodiff/reverse-loop.slang

(limited to 'tests/autodiff/reverse-loop.slang')

diff --git a/tests/autodiff/reverse-loop.slang b/tests/autodiff/reverse-loop.slang
deleted file mode 100644
index 18b672860..000000000
--- a/tests/autodiff/reverse-loop.slang
+++ /dev/null
@@ -1,46 +0,0 @@
-//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
-//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
-//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
-//DISABLE_TEST:SIMPLE(filecheck=CHK):-target glsl -stage compute -entry computeMain -report-checkpoint-intermediates
-
-//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
-RWStructuredBuffer<float> outputBuffer;
-
-typedef DifferentialPair<float> dpfloat;
-typedef float.Differential dfloat;
-
-//CHK: note: checkpointing context of 24 bytes associated with function: 'test_simple_loop'
-[Differentiable]
-float test_simple_loop(float y)
-{
-    //CHK: note: 20 bytes (FixedArray<float, 5> ) used to checkpoint the following item:
-    float t = y;
-
-    //CHK: note: 4 bytes (int32_t) used for a loop counter here:
-    for (int i = 0; i < 3; i++)
-    {
-        t = t * t;
-    }
-
-    return t;
-}
-
-[numthreads(1, 1, 1)]
-void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
-{
-    {
-        dpfloat dpa = dpfloat(1.0, 0.0);
-
-        __bwd_diff(test_simple_loop)(dpa, 1.0f);
-        outputBuffer[0] = dpa.d; // Expect: 8.0
-    }
-
-    {
-        dpfloat dpa = dpfloat(0.4, 0.0);
-
-        __bwd_diff(test_simple_loop)(dpa, 1.0f);
-        outputBuffer[1] = dpa.d; // Expect: 0.0131072
-    }
-}
-
-//CHK-NOT: note
\ No newline at end of file
-- 
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