Re: lto1: internal compiler error: in lto_symtab_merge_decls_1, at lto-symtab.c:549

[Toon Moene <toon@moene.org>]

On 04/25/2010 01:24 PM, Toon Moene wrote:

> Richard Guenther wrote:

[ Concerning this assert ]

>> It is checking that for one symbol we only have one definition.
>>
>> You are using -fuse-linker-plugin?
>
> Indeed, I do (all of our code ends up in libraries - .a files - so I
> have to, to make -flto -fwhole-program be meaningful).
>
> Is it a problem with COMMON ? Those typically have umpteen definitions,
> which all have to match ...

I decided to change the following in lto-symtab.c to help me pinpoint 
this culprit:

Index: lto-symtab.c
===================================================================
--- lto-symtab.c        (revision 159389)
+++ lto-symtab.c        (working copy)
@@ -603,8 +603,15 @@
    /* Assert it's the only one.  */
    if (prevailing)
      for (e = prevailing->next; e; e = e->next)
-      gcc_assert (e->resolution != LDPR_PREVAILING_DEF_IRONLY
-                 && e->resolution != LDPR_PREVAILING_DEF);
+      {
+      if (!(e->resolution != LDPR_PREVAILING_DEF_IRONLY
+                 && e->resolution != LDPR_PREVAILING_DEF))
+        {
+         debug_tree(prevailing->decl);
+         debug_tree(e->decl);
+         gcc_assert(0);
+        }
+      }

    /* If there's not a prevailing symbol yet it's an external reference.
       Happens a lot during ltrans.  Choose the first symbol with a

That resulted in the following messages in my compile log:

  <function_decl 0x2b9d3a4af900 convect_satmixratio
     type <function_type 0x2b9d3a471000
         type <void_type 0x2b9d3548dd20 VOID
             align 8 symtab 0 alias set -1 canonical type 0x2b9d3548dd20
             pointer_to_this <pointer_type 0x2b9d3548ddc8>>
         QI
         size <integer_cst 0x2b9d3547e758 constant 8>
         unit size <integer_cst 0x2b9d3547e780 constant 1>
         align 8 symtab 0 alias set -1 canonical type 0x2b9d3a471000>
     public external QI file bkfconv.f90 line 7712 col 0 align 8>
  <function_decl 0x2b9d3a4af200 convect_satmixratio
     type <function_type 0x2b9d3a471000
         type <void_type 0x2b9d3548dd20 VOID
             align 8 symtab 0 alias set -1 canonical type 0x2b9d3548dd20
             pointer_to_this <pointer_type 0x2b9d3548ddc8>>
         QI
         size <integer_cst 0x2b9d3547e758 constant 8>
         unit size <integer_cst 0x2b9d3547e780 constant 1>
         align 8 symtab 0 alias set -1 canonical type 0x2b9d3a471000>
     public external QI file bkfconv.f90 line 6525 col 0 align 8>
lto1: internal compiler error: in lto_symtab_merge_decls_1, at 
lto-symtab.c:612

bkconv.f90:7712:

    7711 !
    7712        CALL CONVECT_SATMIXRATIO( KLON, ZWORK1, ZTELCL, ZWORK3, 
ZLV, ZLS, ZCPH )

bkfconv.f90:6525:
    6524 !
    6525      CALL CONVECT_SATMIXRATIO( KLON, ZPLCL, ZTLCL, ZWORK1, ZLV, 
ZWORK2, ZCPH )

The only thing I can see is that CONVECT_SATMIXRATIO is called from two 
different routines in one file (bkfconv.f90:6260 CONVECT_TRIGGER_SHAL 
and bkfconv.f90:7258 CONVECT_CLOSURE_SHAL)

Any suggestions how I can further chase this down ?  Are the arguments 
to the subroutine an issue (kind, array size, etc.) ?

Thanks in advance,

-- 
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/
Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html#Fortran