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Date: Tue, 17 Jun 2008 17:46:00 -0000
Subject: [Bug ada/36554]  New: [4.4 regression] verify_flow_info ICE can not throw but has EH edges
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From: "laurent at guerby dot net" <gcc-bugzilla@gcc.gnu.org>
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This doesn't ICE with gcc 4.3.1, may be by luck.

$ cat pt.ads
package PT is

   function S (V : in Long_Float) return String;

end PT;
$ cat pt.adb
package body Pt is

   function Long_Float_Is_Valid (X : in Long_Float) return Boolean is
      Is_Nan : constant Boolean := X /= X;
      Is_P_Inf : constant Boolean := X > Long_Float'Last;
      Is_M_Inf : constant Boolean := X < Long_Float'First;
      Is_Invalid : constant Boolean := Is_Nan or Is_P_Inf or Is_M_Inf;
   begin
      return not Is_Invalid;
   end Long_Float_Is_Valid;

   function S (V : in Long_Float) return String is
   begin
      if not Long_Float_Is_Valid (V) then
         return "INVALID";
      else
         return "OK";
      end if;
   exception
      when others =>
         return "ERROR";
   end S;

end Pt;
$ gcc -c -O2 pt.adb
pt.adb: In function 'Pt.S':
pt.adb:12: error: BB 2 can not throw but has EH edges
pt.adb:12: error: BB 3 can not throw but has EH edges
+===========================GNAT BUG DETECTED==============================+
| 4.4.0 20080617 (experimental) [trunk revision 136861]
(x86_64-unknown-linux-gnu) GCC error:|
| verify_flow_info failed                                                  |
| Error detected around pt.adb:12                                          |


-- 
           Summary: [4.4 regression] verify_flow_info ICE can not throw but
                    has EH edges
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: ada
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: laurent at guerby dot net
  GCC host triplet: x86_64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36554