[Bug c/35193] New: can't find a register in class 'R1_REGS' while reloading 'asm'

[Bug c/35193] New: can't find a register in class 'R1_REGS' while reloading 'asm'

[b dot gunreben at web dot de]

when I try to compile a current glibc for hppa, I get the following error:
gcc -O2 -c dcigettext.i
dcigettext.c: In function ‘_nl_find_msg’:
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220: error: can't
find a register in class 'R1_REGS' while reloading 'asm'
dcigettext.c:1102: error: can't find a register in class 'R1_REGS' while
reloading 'asm'
dcigettext.c:1164: error: can't find a register in class 'R1_REGS' while
reloading 'asm'
dcigettext.c:1194: error: can't find a register in class 'R1_REGS' while
reloading 'asm'
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220: error: 'asm'
operand has impossible constraints
dcigettext.c:1102: error: 'asm' operand has impossible constraints
dcigettext.c:1164: error: 'asm' operand has impossible constraints
dcigettext.c:1194: error: 'asm' operand has impossible constraints

however, if I remove the lines with starting # signs in the preprocessed code
like:

grep -v "^#" dcigettext.i > x.i

it just compiles. The original error also vanishes if I use -O instead of -O2.
Adding preprocessed dcigettext.i, to reproduce, run 

gcc -O2 -c dcigettext.i


-- 
           Summary: can't find a register in class 'R1_REGS' while reloading
                    'asm'
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: b dot gunreben at web dot de
  GCC host triplet: hppa-suse-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug c/35193] can't find a register in class 'R1_REGS' while reloading 'asm'

[b dot gunreben at web dot de]

------- Comment #1 from b dot gunreben at web dot de  2008-02-14 13:28 -------
Created an attachment (id=15148)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15148&action=view)
preprocessed dcigettext.i


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug target/35193] can't find a register in class 'R1_REGS' while reloading 'asm'

[dave at hiauly1 dot hia dot nrc dot ca]

------- Comment #2 from dave at hiauly1 dot hia dot nrc dot ca  2008-02-15 01:54 -------
Subject: Re:  can't find a register in class 'R1_REGS' while reloading 'asm'

> ------- Comment #1 from b dot gunreben at web dot de  2008-02-14 13:28 -------
> Created an attachment (id=15148)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15148&action=view)
>  --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15148&action=view)
> preprocessed dcigettext.i

Richard has probably already spotted this but it looks to me like we
have nested asms.

Dave


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug target/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[danglin at gcc dot gnu dot org]

------- Comment #3 from danglin at gcc dot gnu dot org  2008-02-17 16:46 -------
4.2 works.


-- 

danglin at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-02-17 16:46:40
               date|                            |
            Summary|can't find a register in    |[4.3 Regression] can't find
                   |class 'R1_REGS' while       |a register in class
                   |reloading 'asm'             |'R1_REGS' while reloading
                   |                            |'asm'


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug target/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   GCC host triplet|hppa-suse-linux-gnu         |
 GCC target triplet|                            |hppa-suse-linux-gnu
           Keywords|                            |ice-on-valid-code
      Known to work|                            |4.2.3
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug target/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[danglin at gcc dot gnu dot org]

------- Comment #4 from danglin at gcc dot gnu dot org  2008-02-17 18:10 -------
Breakpoint 1, spill_failure (insn=0xea8a90, class=NO_REGS)
    at ../../gcc/gcc/reload1.c:1986
1986      if (asm_noperands (PATTERN (insn)) >= 0)
(gdb) p debug_rtx ($r26)
(insn 963 1588 964 132
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220 (parallel [
            (set (mem/v/c/i:SI (plus:SI (reg/f:SI 3 %r3)
                        (const_int 24 [0x18])) [3 lws_ret+0 S4 A64])
                (asm_operands/v:SI ("0:
        copy    %3, %%r26
        copy    %4, %%r25
        copy    %5, %%r24
        ble     0xb0(%%sr2, %%r0)
        ldi     0, %%r20
        cmpib,=,n 11,%%r21,0b
        nop
        stw     %%r28, %0
        sub     %%r0, %%r21, %%r21
        stw     %%r21, %1
        ") ("=m") 0 [
                        (reg/f:SI 743)
                        (reg/f:SI 29 %r29 [orig:218 prephitmp.374 ] [218])
                        (reg:SI 19 %r19 [588])
                    ]
                     [
                        (asm_input:SI ("r") 0)
                        (asm_input:SI ("r") 0)
                        (asm_input:SI ("r") 0)
                    ] 333103))
            (set (mem/v/c/i:SI (plus:SI (reg/f:SI 3 %r3)
                        (const_int 20 [0x14])) [3 lws_errno+0 S4 A32])
                (asm_operands/v:SI ("0:
        copy    %3, %%r26
        copy    %4, %%r25
        copy    %5, %%r24
        ble     0xb0(%%sr2, %%r0)
        ldi     0, %%r20
        cmpib,=,n 11,%%r21,0b
        nop
        stw     %%r28, %0
        sub     %%r0, %%r21, %%r21
        stw     %%r21, %1
        ") ("=m") 1 [
                        (reg/f:SI 743)
                        (reg/f:SI 29 %r29 [orig:218 prephitmp.374 ] [218])
                        (reg:SI 19 %r19 [588])
                    ]
                     [
                        (asm_input:SI ("r") 0)
                        (asm_input:SI ("r") 0)
                        (asm_input:SI ("r") 0)
                    ] 333103))
            (set (mem/c/i:SI (reg/f:SI 743) [3 lock+0 S4 A32])
                (asm_operands/v:SI ("0:
        copy    %3, %%r26
        copy    %4, %%r25
        copy    %5, %%r24
        ble     0xb0(%%sr2, %%r0)
        ldi     0, %%r20
        cmpib,=,n 11,%%r21,0b
        nop
        stw     %%r28, %0
        sub     %%r0, %%r21, %%r21
        stw     %%r21, %1
        ") ("=m") 2 [
                        (reg/f:SI 743)
                        (reg/f:SI 29 %r29 [orig:218 prephitmp.374 ] [218])
                        (reg:SI 19 %r19 [588])
                    ]
                     [
                        (asm_input:SI ("r") 0)
                        (asm_input:SI ("r") 0)
                        (asm_input:SI ("r") 0)
                    ] 333103))
            (clobber (mem:BLK (scratch) [0 A8]))
            (clobber (reg:QI 31 %r31))
            (clobber (reg:QI 28 %r28))
            (clobber (reg:QI 20 %r20))
            (clobber (reg:QI 21 %r21))
            (clobber (reg:QI 22 %r22))
            (clobber (reg:QI 23 %r23))
            (clobber (reg:QI 24 %r24))
            (clobber (reg:QI 25 %r25))
            (clobber (reg:QI 26 %r26))
            (clobber (reg:QI 1 %r1))
        ]) -1 (expr_list:REG_DEAD (reg:SI 19 %r19 [588])
        (expr_list:REG_DEAD (reg/f:SI 29 %r29 [orig:218 prephitmp.374 ] [218])
            (expr_list:REG_UNUSED (reg:QI 31 %r31)
                (expr_list:REG_UNUSED (reg:QI 28 %r28)
                    (expr_list:REG_UNUSED (reg:QI 26 %r26)
                        (expr_list:REG_UNUSED (reg:QI 25 %r25)
                            (expr_list:REG_UNUSED (reg:QI 24 %r24)
                                (expr_list:REG_UNUSED (reg:QI 23 %r23)
                                    (expr_list:REG_UNUSED (reg:QI 22 %r22)
                                        (expr_list:REG_UNUSED (reg:QI 21 %r21)
                                            (expr_list:REG_UNUSED (reg:QI 20
%r20)
                                                (expr_list:REG_UNUSED (reg:QI 1
%r1)
                                                    (nil))))))))))))))
$4 = void


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug target/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[danglin at gcc dot gnu dot org]

------- Comment #5 from danglin at gcc dot gnu dot org  2008-02-18 03:00 -------
The problem starts in the gcse1 pass:

(insn 957 956 958 139
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220 (set (reg/f:SI
735)
        (high:SI (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl 0x40605840
lock>))) 49 {*pa.md:3017} (nil))

(insn 958 957 962 139
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220 (set (reg/f:SI
743)
        (lo_sum:SI (reg/f:SI 735)
            (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl 0x40605840
lock>))) 52 {*pa.md:3097} (expr_list:REG_EQUAL (symbol_ref:SI ("lock.8450")
[flags 0x2] <var_decl 0x40605840 lock>)
        (nil)))

(insn 962 958 963 139
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220 (set (reg:SI 588)
        (const_int 1 [0x1])) 37 {*pa.md:2542} (nil))

(insn 963 962 964 139
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220 (parallel [

...

(insn 958 957 962 139
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:
220 (set (reg/f:SI 743)
        (lo_sum:SI (reg/f:SI 735)
            (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl 0x40605840
lock>))) 52 {*pa.md:3097} (expr_list:REG_EQUAL (symbol_ref:SI ("lock.8450")
[flags 0x2] <var_decl 0x40605840 lock>)
        (nil)))

...

(insn 979 977 980 143
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:
225 (set (reg:SI 26 %r26)
        (lo_sum:SI (reg/f:SI 735)
            (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl 0x40605840
lock>))) 52 {*pa.md:3097} (expr_list:REG_EQUAL (symbol_ref:SI ("lock.8450")
[flags 0x2] <var_decl 0x40605840 lock>)
        (nil)))

...

(insn 1055 1053 1056 154 dcigettext.c:1102 (set (reg/v:SI 26 %r26 [ __r26 ])
        (lo_sum:SI (reg/f:SI 735)
            (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl 0x40605840
lock>))) 52 {*pa.md:3097} (expr_list:REG_DEAD (reg/f:SI 735)
        (expr_list:REG_EQUAL (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl
0x40605840 lock>)
            (nil))))


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug target/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[danglin at gcc dot gnu dot org]

------- Comment #6 from danglin at gcc dot gnu dot org  2008-02-18 15:23 -------
The testcase compiles with -fno-gcse.  However, the result from the gcse1
pass using the 4.2 branch is similar to that with 4.3.

In the greg dump with 4.3, we have:

(insn 957 956 958 132
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220 (set (reg/f:SI
735)
        (high:SI (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl 0x40605840
lock>))) 49 {*pa.md:3017} (expr_list:REG_EQUIV (high:SI (symbol_ref:SI
("lock.8450") [flags 0x2] <var_decl 0x40605840 lock>))
        (nil)))

(insn 958 957 1588 132
../ports/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h:220 (set (reg/f:SI
743)
        (lo_sum:SI (reg/f:SI 735)
            (symbol_ref:SI ("lock.8450") [flags 0x2] <var_decl 0x40605840
lock>))) 52 {*pa.md:3097} (expr_list:REG_EQUIV (symbol_ref:SI ("lock.8450")
[flags 0x2] <var_decl 0x40605840 lock>)
        (nil)))

In the 4.2 dump, we have:

(insn 1097 1096 1764 125 (set (reg:SI 1 %r1)
        (high:SI (symbol_ref:SI ("lock___8727") [flags 0x2] <var_decl
0x402ece18
 lock>))) 49 {*pa.md:2959} (nil)
    (expr_list:REG_EQUIV (high:SI (symbol_ref:SI ("lock___8727") [flags 0x2]
<va
r_decl 0x402ece18 lock>))
        (nil)))

(insn 1764 1097 1102 125 (set (reg/f:SI 18 %r18 [692])
        (reg:SI 1 %r1)) 37 {*pa.md:2484} (nil)
    (nil))

(insn 1102 1764 1098 125 (set (reg:SI 19 %r19 [574])
        (const_int 1 [0x1])) 37 {*pa.md:2484} (nil)
    (expr_list:REG_EQUIV (const_int 1 [0x1])
        (nil)))

(insn 1098 1102 1103 125 (set (reg/f:SI 10 %r10 [694])
        (lo_sum:SI (reg/f:SI 18 %r18 [692])
            (symbol_ref:SI ("lock___8727") [flags 0x2] <var_decl 0x402ece18
lock
>))) 52 {*pa.md:3039} (nil)
    (expr_list:REG_EQUIV (symbol_ref:SI ("lock___8727") [flags 0x2] <var_decl
0x
402ece18 lock>)
        (nil)))

Also, there is:

Reloads for insn # 1097
Reload 0: reload_out (SI) = (reg/f:SI 18 %r18 [692])
        R1_REGS, RELOAD_FOR_OUTPUT (opnum = 0)
        reload_out_reg: (reg/f:SI 18 %r18 [692])
        reload_reg_rtx: (reg:SI 1 %r1)

It seems like 4.3 is no longer doing the output reload.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[danglin at gcc dot gnu dot org]

------- Comment #7 from danglin at gcc dot gnu dot org  2008-02-19 04:28 -------
It appears this regressions was introduced in revision 130297.


-- 

danglin at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|target                      |middle-end


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3/4.4 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3/4.4 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.3.0
   Target Milestone|4.3.0                       |4.3.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3/4.4 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

------- Comment #8 from rguenth at gcc dot gnu dot org  2008-06-06 14:58 -------
4.3.1 is being released, adjusting target milestone.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.3.1                       |4.3.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3/4.4 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[jsm28 at gcc dot gnu dot org]

------- Comment #9 from jsm28 at gcc dot gnu dot org  2008-08-27 22:03 -------
4.3.2 is released, changing milestones to 4.3.3.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.3.2                       |4.3.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3/4.4 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[danglin at gcc dot gnu dot org]

------- Comment #10 from danglin at gcc dot gnu dot org  2008-11-01 19:25 -------
This seems to be fixed with 4.4.0 as of 2008-11-01.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

------- Comment #11 from rguenth at gcc dot gnu dot org  2009-01-24 10:20 -------
GCC 4.3.3 is being released, adjusting target milestone.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.3.3                       |4.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

------- Comment #12 from rguenth at gcc dot gnu dot org  2009-08-04 12:28 -------
GCC 4.3.4 is being released, adjusting target milestone.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.3.4                       |4.3.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193

[Bug middle-end/35193] [4.3 Regression] can't find a register in class 'R1_REGS' while reloading 'asm'

[rguenth at gcc dot gnu dot org]

------- Comment #13 from rguenth at gcc dot gnu dot org  2010-05-22 18:12 -------
GCC 4.3.5 is being released, adjusting target milestone.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.3.5                       |4.3.6


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35193