Use -O2 not -O3 for building flambda2

middle_end/flambda2/algorithms/dune

@@ -6,5 +6,5 @@
  (flags
   (:standard -principal -nostdlib))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries stdlib ocamlcommon))

middle_end/flambda2/bound_identifiers/dune

@@ -18,7 +18,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/cmx/dune

@@ -28,7 +28,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/compare/dune

@@ -12,5 +12,5 @@
    -open
    Flambda2_algorithms))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries stdlib ocamlcommon flambda2_algorithms flambda2_terms))

middle_end/flambda2/dune

@@ -22,7 +22,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (modules flambda2)
  (libraries
   stdlib

middle_end/flambda2/from_lambda/dune

@@ -30,7 +30,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/identifiers/dune

@@ -16,7 +16,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/kinds/dune

@@ -14,7 +14,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/lattices/dune

@@ -14,7 +14,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/nominal/dune

@@ -14,7 +14,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/numbers/dune

@@ -12,5 +12,5 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries stdlib ocamlcommon flambda2_algorithms flambda2_ui))

middle_end/flambda2/parser/dune

@@ -117,7 +117,7 @@
    -open
    Flambda2_nominal))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (modules
   (:standard \ flambda_parser_in))
  ; ignore inputs to sed

middle_end/flambda2/simplify/dune

@@ -32,7 +32,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/term_basics/dune

@@ -20,7 +20,7 @@
    -open
    Flambda2_numbers))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/terms/dune

@@ -26,7 +26,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/to_cmm/dune

@@ -28,7 +28,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/types/dune

@@ -28,7 +28,7 @@
    -open
    Flambda2_ui))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries
   stdlib
   ocamlcommon

middle_end/flambda2/ui/dune

@@ -6,5 +6,5 @@
  (flags
   (:standard -principal -nostdlib))
  (ocamlopt_flags
-  (:standard -O3))
+  (:standard -O2))
  (libraries stdlib ocamlcommon))