[Bug bootstrap/40894] New: [4.4 Regression] bootstrap4-lean failed crtfastmath.o comparision

[Bug bootstrap/40894] New: [4.4 Regression] bootstrap4-lean failed crtfastmath.o comparision

[htl10 at users dot sourceforge dot net]

make bootstrap4-lean failed with 4.4.0 and 4.4.1 with crtfastmath.o comparison.
The last gcc version I can make bootstrap4-lean was 4.3.3 (and before that,
4.3.1) which was what I tried building 4.4.x with.

Strangely "make" (which I understand do a 3 stage boostrap) doesn't have this
problem, but fails further down with path length problems (
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38251#c8 ).

objdump -Dxzs ./prev-gcc/crtfastmath.o > prev-gcc-crtfastmath-dump
objdump -Dxzs ./gcc/crtfastmath.o > gcc-crtfastmath-dump
objdump -Dxzs /usr/local/lib/gcc/alphaev68-dec-osf5.1a/4.3.3/crtfastmath.o \
   > gcc-4.3.3-crtfastmath-dump
-------------
# diff prev-gcc-crtfastmath-dump gcc-crtfastmath-dump
2,3c2,3
< ./prev-gcc/crtfastmath.o:     file format ecoff-littlealpha
< ./prev-gcc/crtfastmath.o
---
> ./gcc/crtfastmath.o:     file format ecoff-littlealpha
> ./gcc/crtfastmath.o
73c73
<  0030 31000000 02000204 00000000 00000000  1...............
---
>  0030 01000000 02000204 00000000 00000000  ................
103c103
<   30: 31 00 00 00     call_pal        0x31
---
>   30:	01 00 00 00 	call_pal	0x1
--------------------

I also 'diff gcc-crtfastmath-dump gcc-4.3.3-crtfastmath-dump' - while I don't
understand alpha assembler at all, the diff against with gcc 4.3.3 is mostly
versioning, and gcc 4.3.3. also have call_pal        0x31. So it appears that
bootstrap4-lean miscompile at the last stage? (i.e. prev-gcc/crtfastmath.o was
correct, gcc/crtfastmath.o was wrong).

Anybody can suggest how to take this forward? I am currently on 4.3.3, but am
keen to heep the alpha port of gcc alive for as long as is feasible...


-- 
           Summary: [4.4 Regression] bootstrap4-lean failed crtfastmath.o
                    comparision
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: htl10 at users dot sourceforge dot net
  GCC host triplet: alphaev68-dec-osf5.1a


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4 Regression] bootstrap4-lean failed crtfastmath.o comparision

[jsm28 at gcc dot gnu dot org]

------- Comment #1 from jsm28 at gcc dot gnu dot org  2009-07-29 23:08 -------
There is no indication in this bug report of whether the issue also
appears for 4.5.  If it does, please update the regression marker to
"4.4/4.5 Regression".


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
   Target Milestone|---                         |4.4.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4 Regression] bootstrap4-lean failed crtfastmath.o comparision

[htl10 at users dot sourceforge dot net]

------- Comment #2 from htl10 at users dot sourceforge dot net  2009-07-30 09:52 -------
(In reply to comment #1)
> There is no indication in this bug report of whether the issue also
> appears for 4.5.  If it does, please update the regression marker to
> "4.4/4.5 Regression".


I downloaded and tried the gcc-4.5-20090723 snapshot tar ball with make
bootstrap-lean - it finished the building and comparison of the C compiler but
failed later in libstdc++-v3 . I hope this get fixed by 4.4.2 if there is one.
Meanwhile I'll check and possibly file the libstdc++-v3 issue.



-- 

htl10 at users dot sourceforge dot net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.4.0 4.4.1
      Known to work|                            |4.3.1 4.3.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4 Regression] bootstrap4-lean failed crtfastmath.o comparision

[htl10 at users dot sourceforge dot net]

------- Comment #3 from htl10 at users dot sourceforge dot net  2009-07-30 13:01 -------
FYI, the libstdc++v3 issue with gcc 4.5 is filed as bug 40912 . So gcc 4.4/4.5
support are both a bit broken, just differently.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4/4.5 Regression] bootstrap4-lean failed crtfastmath.o comparision

[htl10 at users dot sourceforge dot net]

------- Comment #4 from htl10 at users dot sourceforge dot net  2009-09-25 04:33 -------
situation gone worse:

make[3]: Leaving directory `/home/htl10/tmp-build/ob-dir'
Comparing stages 2 and 3
warning: gcc/cc1-checksum.o differs
warning: gcc/cc1plus-checksum.o differs
warning: gcc/cc1obj-checksum.o differs
Bootstrap comparison failure!
gcc/java/win32-host.o differs
gcc/build/min-insn-modes.o differs
gcc/dummy-checksum.o differs
gcc/insn-peep.o differs
gcc/graphite-blocking.o differs
gcc/graphite-clast-to-gimple.o differs
gcc/graphite-dependences.o differs
gcc/graphite-interchange.o differs
gcc/graphite-poly.o differs
gcc/graphite-ppl.o differs
gcc/graphite-scop-detection.o differs
gcc/graphite-sese-to-poly.o differs
gcc/loop-doloop.o differs
gcc/version.o differs
gcc/vmsdbgout.o differs
gcc/xcoffout.o differs
gcc/host-default.o differs
gcc/gcc-options.o differs
gcc/collect2-aix.o differs
intl/osdep.o differs
libiberty/safe-ctype.o differs
make[2]: *** [compare] Error 1
make[2]: Leaving directory `/home/htl10/tmp-build/ob-dir'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/home/htl10/tmp-build/ob-dir'
make: *** [bootstrap4-lean] Error 2
bash-2.05a# 


-- 

htl10 at users dot sourceforge dot net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.4 Regression] bootstrap4-|[4.4/4.5 Regression]
                   |lean failed crtfastmath.o   |bootstrap4-lean failed
                   |comparision                 |crtfastmath.o comparision


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4/4.5 Regression] bootstrap4-lean failed crtfastmath.o comparision

[htl10 at users dot sourceforge dot net]

------- Comment #5 from htl10 at users dot sourceforge dot net  2009-09-25 04:40 -------
latest run was with svn-r152154 . also filed new bug 41465 , I just noticed I
wrote 'bootstrap-lean' in comment 2 instead of 'bootstrap4-lean' - it is
probably not important in light of the new bug and more extensive failures.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4/4.5 Regression] bootstrap4-lean failed crtfastmath.o comparision

[jakub at gcc dot gnu dot org]

-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.4.2                       |4.4.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4/4.5 Regression] bootstrap4-lean failed crtfastmath.o comparision

[jakub at gcc dot gnu dot org]

-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.4.3                       |4.4.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4/4.5/4.6 Regression] bootstrap4-lean failed crtfastmath.o comparision

[jakub at gcc dot gnu dot org]

-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.4.4                       |4.4.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4/4.5/4.6 Regression] bootstrap4-lean failed crtfastmath.o comparision

[htl10 at users dot sourceforge dot net]

------- Comment #6 from htl10 at users dot sourceforge dot net  2010-07-14 14:25 -------
4.3.5 also bootstrap4-lean alright (hit bug 40947 later with libjava).


-- 

htl10 at users dot sourceforge dot net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|4.3.1 4.3.3                 |4.3.1 4.3.3 4.3.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894

[Bug bootstrap/40894] [4.4/4.5/4.6 Regression] bootstrap4-lean failed crtfastmath.o comparision

[htl10 at users dot sourceforge dot net]

------- Comment #7 from htl10 at users dot sourceforge dot net  2010-07-14 14:44 -------
4.4.4 (built with 4.3.3) fails at stage 3 and 4 comparison.

Comparing stages 3 and 4
Bootstrap comparison failure!
./crtfastmath.o differs
make[2]: *** [compare3] Error 1
  objdump -Dxzs stage3-gcc/crtfastmath.o > stage3-dump
  objdump -Dxzs stage4-gcc/crtfastmath.o > stage4-dump
# diff -u  stage3-dump stage4-dump
--- stage3-dump 2010-07-14 15:30:13.000000000 +0100
+++ stage4-dump 2010-07-14 15:30:27.000000000 +0100
@@ -1,6 +1,6 @@

-stage3-gcc/crtfastmath.o:     file format ecoff-littlealpha
-stage3-gcc/crtfastmath.o
+stage4-gcc/crtfastmath.o:     file format ecoff-littlealpha
+stage4-gcc/crtfastmath.o
 architecture: alpha, flags 0x00000035:
 HAS_RELOC, HAS_LINENO, HAS_SYMS, HAS_LOCALS
 start address 0x00000000
@@ -70,7 +70,7 @@
  0010 00301f22 10807da7 00405b6b 0100ba27  .0."..}..@[k...'
  0020 2480bd23 00005ea7 1000de23 0180fa6b  $..#..^....#...k
 Contents of section .xdata:
- 0030 31000000 02000204 00000000 00000000  1...............
+ 0030 01000000 02000204 00000000 00000000  ................
 Contents of section .pdata:
  0040 00000000 ecffffff                    ........        
 Contents of section .lita:
@@ -100,7 +100,7 @@
 Disassembly of section .xdata:

 00000030 <.xdata>:
-  30:  31 00 00 00     call_pal        0x31
+  30:  01 00 00 00     call_pal        0x1
   34:  02 00 02 04     .long 0x4020002
   38:  00 00 00 00     halt
   3c:  00 00 00 00     halt


-- 

htl10 at users dot sourceforge dot net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.4.0 4.4.1                 |4.4.0 4.4.1 4.4.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40894