Calculate llFrand's min and max when possible

lslopt/lslfuncopt.py

@@ -528,6 +528,12 @@ def OptimizeFunc(self, parent, index):
             parent[index] = nr(nt='CONST', t='list', value=[], SEF=True)
             return
 
+    if name == 'llFrand' and child[0].nt == 'CONST':
+        # We can set a range when the input is a constant
+        value = child[0].value
+        node.min = lslfuncs.F32(min(value, 0) * 0.9999999403953552)
+        node.max = lslfuncs.F32(max(value, 0) * 0.9999999403953552)
+
 def FuncOptSetup():
     # Patch the default values list for LSO
     if lslcommon.LSO:

unit_tests/expr.suite/llfrand-1.lsl

@@ -1,3 +1,4 @@
+// Test that there's at least one 7-digit number
 [ llFrand(16777216)
 , llFrand(16777216)
 , llFrand(16777216)

unit_tests/expr.suite/llfrand-2.lsl

@@ -1,3 +1,4 @@
+// Test that there's at least one 8-digit number
 [ llFrand(16777216)
 , llFrand(16777216)
 , llFrand(16777216)

unit_tests/expr.suite/llfrand-3.lsl

@@ -0,0 +1,23 @@
+[ llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+, llFrand(-5)
+, llFrand(-5.0)
+]

unit_tests/expr.suite/llfrand-3.out

@@ -0,0 +1,3 @@
+REGEX
+(?:[\[,] -[0-4]\.[0-9]*
+){22}\]

unit_tests/regression.suite/llfrand.lsl

@@ -0,0 +1,20 @@
+default { timer() {
+    llParticleSystem(
+         [ llFrand(-5)
+         , llFrand(-5) > -5
+         , llFrand(-5) <= 0
+         , llFrand(-5) > 0
+         , llFrand(-5.)
+         , llFrand(-16777216)
+         , llFrand(-16777216.)
+         , llFrand(5)
+         , llFrand(5) < 5
+         , llFrand(5) >= 0
+         , llFrand(5) < 0
+         , llFrand(5.)
+         , llFrand(16777216)
+         , llFrand(16777216.)
+         , llFrand(33554433)
+         , llFrand(33554433.)
+     ]);
+}}

unit_tests/regression.suite/llfrand.out

@@ -0,0 +1,24 @@
+default
+{
+    timer()
+    {
+        llParticleSystem(
+            [ llFrand(((integer)-5))
+            , 1
+            , 1
+            , 0
+            , llFrand(((float)-5))
+            , llFrand(((integer)-16777216))
+            , llFrand(((float)-16777216))
+            , llFrand(5)
+            , 1
+            , 1
+            , 0
+            , llFrand(((float)5))
+            , llFrand(16777216)
+            , llFrand(((float)16777216))
+            , llFrand(33554433)
+            , llFrand(((float)33554432))
+            ]);
+    }
+}

unit_tests/regression.suite/llfrand.run

@@ -0,0 +1 @@
+main.py -O -listadd -