Use scratchData on `IRInst` to replace HashSets. (#2978)

* Use scratchData on `IRInst` to replace HashSets.

* Update test results.

* Initialize scratchData.

* Update autodiff documentation.

* Use enum instead of bool.

---------

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

1 files changed, 20 insertions, 19 deletions

diff --git a/tests/experimental/liveness/liveness.slang.expected b/tests/experimental/liveness/liveness.slang.expected
index fe49e85d1..0f5e5deab 100644
--- a/tests/experimental/liveness/liveness.slang.expected
+++ b/tests/experimental/liveness/liveness.slang.expected
@@ -95,9 +95,10 @@ void main()
     SomeStruct_0 _S10 = makeSomeStruct_0();
     const int  _S11[100] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
     int _S12 = index_0 & 7;
+    uint _S13 = uint(index_0);
     int v_1 = someSlowFunc_0(index_0);
-    bool _S13 = (v_1 & 256) != 0;
-    int _S14 = v_1 & 3;
+    bool _S14 = (v_1 & 256) != 0;
+    uint _S15 = uint(v_1 & 3);
     int i_2;
     livenessStart_1(i_2, 0);
     i_2 = 0;
@@ -120,10 +121,10 @@ void main()
         livenessStart_2(t_0, 0);
         t_0 = _S10;
         SomeStruct_0 u_0;
-        if(_S13)
+        if(_S14)
         {
-            s_3.x_0 = ((anotherBuffer_0)._data[(uint(_S14))]);
-            t_0.x_0 = ((anotherBuffer_0)._data[(uint(_S14))]);
+            s_3.x_0 = ((anotherBuffer_0)._data[(_S15)]);
+            t_0.x_0 = ((anotherBuffer_0)._data[(_S15)]);
             livenessStart_2(u_0, 0);
             u_0.a_1 = 0;
             u_0.x_0 = 0;
@@ -136,33 +137,33 @@ void main()
             x_1.a_1 = 0;
             x_1.x_0 = 0;
             x_1.c_0 = _S11;
-            x_1.x_0 = ((anotherBuffer_0)._data[(uint(_S14))]) + 1;
-            SomeStruct_0 _S15 = x_1;
+            x_1.x_0 = ((anotherBuffer_0)._data[(_S15)]) + 1;
+            SomeStruct_0 _S16 = x_1;
             livenessEnd_2(x_1, 0);
             livenessStart_2(u_0, 0);
-            u_0 = _S15;
+            u_0 = _S16;
         }
         s_3.c_0[_S12] = s_3.c_0[_S12] + 1;
-        int _S16 = s_3.x_0 + t_0.x_0;
-        SomeStruct_0 _S17 = u_0;
+        int _S17 = s_3.x_0 + t_0.x_0;
+        SomeStruct_0 _S18 = u_0;
         livenessEnd_2(u_0, 0);
-        int _S18 = _S16 + _S17.x_0 + doThing_0(t_0);
-        int _S19 = somethingElse_0(t_0);
+        int _S19 = _S17 + _S18.x_0 + doThing_0(t_0);
+        int _S20 = somethingElse_0(t_0);
         livenessEnd_2(t_0, 0);
-        int _S20 = _S18 + _S19;
-        int _S21 = s_3.c_0[2];
+        int _S21 = _S19 + _S20;
+        int _S22 = s_3.c_0[2];
         livenessEnd_2(s_3, 0);
-        int _S22 = _S20 + _S21;
-        int _S23 = res_0;
+        int _S23 = _S21 + _S22;
+        int _S24 = res_0;
         livenessEnd_0(res_0, 0);
-        int res_1 = _S23 + _S22;
+        int res_1 = _S24 + _S23;
         i_2 = i_2 + 1;
         livenessStart_1(res_0, 0);
         res_0 = res_1;
     }
-    int _S24 = res_0;
+    int _S25 = res_0;
     livenessEnd_0(res_0, 0);
-    ((outputBuffer_0)._data[(uint(index_0))]) = _S24;
+    ((outputBuffer_0)._data[(_S13)]) = _S25;
     return;
 }