- Support "switch" statements over 64-bit integers

  (in CompCert C to Cminor, included)
- Translation of "switch" to decision trees or jumptables made generic
  over the sizes of integers and moved to the Cminor->CminorSel pass
  instead of CminorSel->RTL as before.
- CminorSel: add "exitexpr" to support the above.
- ValueDomain: more precise analysis of comparisons against an integer
  literal.  E.g. "x >=u 0" is always true.


git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2565 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e

1 files changed, 5 insertions, 1 deletions

diff --git a/cfrontend/Cshmgen.v b/cfrontend/Cshmgen.v
index cedfd8b..3b23a54 100644
--- a/cfrontend/Cshmgen.v
+++ b/cfrontend/Cshmgen.v
@@ -589,7 +589,11 @@ Fixpoint transl_statement (tyret: type) (nbrk ncnt: nat)
   | Clight.Sswitch a sl =>
       do ta <- transl_expr a;
       do tsl <- transl_lbl_stmt tyret 0%nat (S ncnt) sl;
-      OK (Sblock (Sswitch ta tsl))
+      match classify_switch (typeof a) with
+      | switch_case_i => OK (Sblock (Sswitch false ta tsl))
+      | switch_case_l => OK (Sblock (Sswitch true ta tsl))
+      | switch_default => Error(msg "Cshmgen.transl_stmt(switch)")
+      end
   | Clight.Slabel lbl s =>
       do ts <- transl_statement tyret nbrk ncnt s;
       OK (Slabel lbl ts)