C++: more semantic range analysis perf tweaks

Author: Robert Marsh

cpp/ql/lib/experimental/semmle/code/cpp/semantic/analysis/SignAnalysisCommon.qll

@@ -204,6 +204,7 @@ private class BinarySignExpr extends FlowSignExpr {
   }
 }
 
+pragma[noinline]
 private predicate binaryExprOperands(SemBinaryExpr binary, SemExpr left, SemExpr right) {
   binary.getLeftOperand() = left and binary.getRightOperand() = right
 }

cpp/ql/src/experimental/Likely Bugs/ArrayAccessProductFlow.ql

@@ -6,6 +6,21 @@ import experimental.semmle.code.cpp.semantic.SemanticExprSpecific
 import semmle.code.cpp.ir.IR
 import semmle.code.cpp.valuenumbering.GlobalValueNumbering
 import semmle.code.cpp.models.interfaces.Allocation
+import semmle.code.cpp.ir.IRConfiguration
+
+class RangeAnalysisIRConfig extends IRConfiguration {
+  override predicate shouldCreateIRForFunction(Declaration decl) {
+    not exists(DeclStmt stmt |
+      stmt.getEnclosingFunction() = decl and
+      (
+        not exists(stmt.getADeclaration())
+        or
+        not exists(stmt.getADeclarationEntry())
+      )
+    )
+  }
+}
+
 
 predicate bounded(Instruction i, Bound b, int delta, boolean upper) {
   // TODO: reason