Re: Bootstrap broken with checking disabled on at least i686

[Ranjit Mathew <rmathew at gmail dot com>]

Steven Bosscher wrote:
[...]
> Bootstrap comparison failure!

FWIW, I am also seeing the same error on i686-pc-linux-gnu.
(I use --disable-checking, --disable-nls and
--disable-libmudflap.)

I initially thought that it was being caused by one of
these two patches:

  http://gcc.gnu.org/ml/gcc-patches/2004-05/msg01166.html
  http://gcc.gnu.org/ml/gcc-patches/2004-05/msg01157.html

but even after reverting *both* of them, I continue to
see the errors (being a bit impatient, I have only
tried "make bubblestrap" after each of the reverts).

As an example of the differences, "objdump -xD" diff
of stage2/tree-ssa.o and (stage3)tree-ssa.o follows:

========================================================
@@ -1,6 +1,6 @@

-stage2/tree-ssa.o:     file format elf32-i386
-stage2/tree-ssa.o
+tree-ssa.o:     file format elf32-i386
+tree-ssa.o
 architecture: i386, flags 0x00000011:
 HAS_RELOC, HAS_SYMS
 start address 0x00000000
@@ -13,31 +13,31 @@
                   CONTENTS, ALLOC, LOAD, RELOC, DATA
   2 .bss          00000000  00000000  00000000  00001cd0  2**2
                   ALLOC
-  3 .debug_abbrev 00000421  00000000  00000000  00001cd0  2**0
+  3 .debug_abbrev 000003ff  00000000  00000000  00001cd0  2**0
                   CONTENTS, READONLY, DEBUGGING
-  4 .debug_info   00005f83  00000000  00000000  000020f1  2**0
+  4 .debug_info   00005f4a  00000000  00000000  000020cf  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
-  5 .debug_line   00000851  00000000  00000000  00008074  2**0
+  5 .debug_line   00000851  00000000  00000000  00008019  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
-  6 .rodata.str1.1 000000c0  00000000  00000000  000088c5  2**0
+  6 .rodata.str1.1 000000c0  00000000  00000000  0000886a  2**0
                   CONTENTS, ALLOC, LOAD, READONLY, DATA
-  7 .rodata.str1.4 000002da  00000000  00000000  00008988  2**2
+  7 .rodata.str1.4 000002da  00000000  00000000  0000892c  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, DATA
-  8 .debug_frame  0000026c  00000000  00000000  00008c64  2**2
+  8 .debug_frame  0000026c  00000000  00000000  00008c08  2**2
                   CONTENTS, RELOC, READONLY, DEBUGGING
-  9 .debug_loc    00000e3f  00000000  00000000  00008ed0  2**0
+  9 .debug_loc    00000e3f  00000000  00000000  00008e74  2**0
                   CONTENTS, READONLY, DEBUGGING
- 10 .debug_pubnames 0000013f  00000000  00000000  00009d0f  2**0
+ 10 .debug_pubnames 0000013f  00000000  00000000  00009cb3  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
- 11 .debug_aranges 00000020  00000000  00000000  00009e4e  2**0
+ 11 .debug_aranges 00000020  00000000  00000000  00009df2  2**0
                   CONTENTS, RELOC, READONLY, DEBUGGING
- 12 .debug_ranges 00000180  00000000  00000000  00009e6e  2**0
+ 12 .debug_ranges 00000180  00000000  00000000  00009e12  2**0
                   CONTENTS, READONLY, DEBUGGING
- 13 .debug_str    00005d28  00000000  00000000  00009fee  2**0
+ 13 .debug_str    00005d28  00000000  00000000  00009f92  2**0
                   CONTENTS, READONLY, DEBUGGING
- 14 .comment      0000002a  00000000  00000000  0000fd16  2**0
+ 14 .comment      0000002a  00000000  00000000  0000fcba  2**0
                   CONTENTS, READONLY
- 15 .note.GNU-stack 00000000  00000000  00000000  0000fd40  2**0
+ 15 .note.GNU-stack 00000000  00000000  00000000  0000fce4  2**0
                   CONTENTS, READONLY
 SYMBOL TABLE:
 00000000 l    df *ABS* 00000000 tree-ssa.c