[Bug target/21761] [4.1 Regression] mainline gcc causing internal compiler error.

[seurer at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21761

seurer at gcc dot gnu.org changed:

   What|Removed |Added

 Status|VERIFIED|CLOSED
 CC||seurer at gcc dot gnu.org

--- Comment #7 from seurer at gcc dot gnu.org ---
This was fixed long ago.  Closing.

[Bug target/21761] [4.1 Regression] mainline gcc causing internal compiler error.

[uttamp at us dot ibm dot com]

--- Additional Comments From uttamp at us dot ibm dot com  2005-06-01 23:31 
---
I've verified that this bug has been fixed in mainline gcc.

-- 
   What|Removed |Added

 Status|RESOLVED|VERIFIED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21761

[Bug target/21761] [4.1 Regression] mainline gcc causing internal compiler error.

[geoffk at gcc dot gnu dot org]

--- Additional Comments From geoffk at gcc dot gnu dot org  2005-05-30 
06:13 ---
Should work now, but please verify.

-- 
   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution||FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21761

[Bug target/21761] [4.1 Regression] mainline gcc causing internal compiler error.

[cvs-commit at gcc dot gnu dot org]

--- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-05-30 
06:10 ---
Subject: Bug 21761

CVSROOT:/cvs/gcc
Module name:gcc
Changes by: [EMAIL PROTECTED]   2005-05-30 06:10:06

Modified files:
gcc: ChangeLog 
gcc/config/rs6000: rs6000.md 
gcc/testsuite  : ChangeLog 
Added files:
gcc/testsuite/gcc.c-torture/compile: pr21761.c 

Log message:
2005-05-29  Geoffrey Keating  <[EMAIL PROTECTED]>

PR target/21761
* config/rs6000/rs6000.md: Remove stray TARGET_32BIT from
pattern involving `:P'.

Index: testsuite/ChangeLog
2005-05-29  Geoffrey Keating  <[EMAIL PROTECTED]>

PR target/21761
* gcc.c-torture/compile/pr21761.c: New.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.8944&r2=2.8945
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/rs6000/rs6000.md.diff?cvsroot=gcc&r1=1.369&r2=1.370
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5557&r2=1.5558
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/compile/pr21761.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21761

[Bug target/21761] [4.1 Regression] mainline gcc causing internal compiler error.

[uttamp at us dot ibm dot com]

--- Additional Comments From uttamp at us dot ibm dot com  2005-05-26 18:23 
---
(In reply to comment #0)
> test case:
> $ cat bug1.c
> void f1()
> {
>   long bit=0, exponent;
>   exponent = -exponent;
>   for (bit = 1; exponent; bit <<= 1)
>   if (exponent & bit)
>   exponent ^= bit;
> }
> 
> # Compilation parameters
> $ gcc -c -O3 -m64 bug1,c
> 
> gcc gives internal compiler error on Powerpc platform.
> 
> bug1.c: In function ‘f1’:
> bug1.c:8: error: could not split insn
> (insn:TI 13 11 14 (parallel [
> (set (reg:CC 75 7 [125])
> (compare:CC (neg:DI (reg/v:DI 0 0 [orig:119 exponent ] [119]))
> (const_int 0 [0x0])))
> (set (reg/v:DI 0 0 [orig:118 exponent.1 ] [118])
> (neg:DI (reg/v:DI 0 0 [orig:119 exponent ] [119])))
> ]) 76 {*rs6000.md:1653} (nil)
> (nil))
> bug1.c:8: internal compiler error: in final_scan_insn, at final.c:2419
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See http://gcc.gnu.org/bugs.html> for instructions.
> 
> Compiler works with all other optimization flags.

I didn't mean to mislead anybody with my earlier comment. But actually compiler
fails with all optimization flags (-O2 and above). And a test case also has one
change to make it more generic type. In the original test case 'exponent' was
just a local and unitialized variable.

void f1(long exponent)
{
   long bit=0;
   exponent = -exponent;
   for (bit = 1; exponent; bit <<= 1)
   if (exponent & bit)
   exponent ^= bit;
}

> 
> After doing reghunt I found a patch, which may not necessarily have caused the
> above failure but compiler started failing after application of this patch, 
> 
> http://gcc.gnu.org/ml/gcc-cvs/2005-05/msg00232.html



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21761

[Bug target/21761] [4.1 Regression] mainline gcc causing internal compiler error.

[geoffk at gcc dot gnu dot org]

--- Additional Comments From geoffk at gcc dot gnu dot org  2005-05-26 
06:50 ---
This should fix it:

*** rs6000.md.~1.367.~  Sat May 14 22:06:45 2005
--- rs6000.md   Wed May 25 23:48:56 2005
***
*** 1672,1678 
(const_int 0)))
 (set (match_operand:P 0 "gpc_reg_operand" "")
(neg:P (match_dup 1)))]
!   "TARGET_32BIT && reload_completed"
[(set (match_dup 0)
(neg:P (match_dup 1)))
 (set (match_dup 2)
--- 1672,1678 
(const_int 0)))
 (set (match_operand:P 0 "gpc_reg_operand" "")
(neg:P (match_dup 1)))]
!   "reload_completed"
[(set (match_dup 0)
(neg:P (match_dup 1)))
 (set (match_dup 2)

-- 
   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |geoffk at gcc dot gnu dot
   |dot org |org
 Status|NEW |ASSIGNED
   Last reconfirmed|2005-05-26 01:15:24 |2005-05-26 06:50:58
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21761

[Bug target/21761] [4.1 Regression] mainline gcc causing internal compiler error.

[pinskia at gcc dot gnu dot org]

--- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-26 
01:15 ---
Confirmed.  Also happens on powerpc-darwin with -m64.

-- 
   What|Removed |Added

 CC||pinskia at gcc dot gnu dot
   ||org
 Status|UNCONFIRMED |NEW
  Component|c   |target
 Ever Confirmed||1
  GCC build triplet|powerpc64-linux |
   GCC host triplet|powerpc64-linux |
 GCC target triplet|powerpc64-linux |powerpc64-*-*
   Keywords||ice-on-valid-code
  Known to fail||4.1.0
  Known to work||4.0.0
   Last reconfirmed|-00-00 00:00:00 |2005-05-26 01:15:24
   date||
Summary|mainline gcc causing|[4.1 Regression] mainline
   |internal compiler error.|gcc causing internal
   ||compiler error.
   Target Milestone|--- |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21761