[Bug c/16283] New: ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[Bug c/16283] New: ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[aaronavay62 at aaronwl dot com]

gcc version 3.5.0 20040626 (experimental)
i686-pc-mingw32

Windows XP SP1 Professional
current Cygwin 1.5.10
binutils 2.15.91 20040628
mingwrt head
w32api head
libiconv 1.9.1
gmake 3.80

Configured with: ../../src/cvs/mainline/gcc/configure --
prefix=/aaronwl/cs/env/mingw-head-head-head --enable-checking --enable-
maintainer-mode --with-included-gettext --with-libiconv-
prefix=/aaronwl/cs/internat/iconv/install

gcc -O2 -c sf_erf.c causes the ICE

../../src/cvs/runtime/mingwex/math/sf_erf.c: In function `erfcf':
../../src/cvs/runtime/mingwex/math/sf_erf.c:264: internal compiler error: in 
subst_stack_regs_pat, at reg-stack.c:1638
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

Testcase is sf_erf.c, attachment following.

-- 
           Summary: ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aaronavay62 at aaronwl dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-mingw32
  GCC host triplet: i686-pc-mingw32
GCC target triplet: i686-pc-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug c/16283] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[aaronavay62 at aaronwl dot com]

------- Additional Comments From aaronavay62 at aaronwl dot com  2004-06-29 22:04 -------
Created an attachment (id=6658)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6658&action=view)
sf_erf.i.bz2 that causes the failure.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug c/16283] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-06-29 22:13 -------
Confirmed. I'm working on a small testcase. 
 
W. 

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug c/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[bangerth at dealii dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |3.5.0
      Known to work|                            |3.4.0
            Summary|ICE subst_stack_regs_pat, at|[3.5 regression] ICE
                   |reg-stack.c:1638 at gcc -O2 |subst_stack_regs_pat, at
                   |                            |reg-stack.c:1638 at gcc -O2
   Target Milestone|---                         |3.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug c/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-06-29 22:18 -------
That was easy: 
----------------- 
double bar(double); 
 
void foo(double x) 
{ 
 double z,r,R,S; 
 r = bar(-0.5625) * bar(z*z+R/S); 
} 
----------------- 
 
g/x> /home/bangerth/bin/gcc-3.5-pre/bin/c++ -O2 -c x.ii  
x.ii: In function `void foo(double)': 
x.ii:7: internal compiler error: in subst_stack_regs_pat, at reg-stack.c:1638 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-06-29 22:18:54
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug target/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2004-07-13 21:56 -------
We can trigger the crash with only one variable:

==================================
int foo(double);

void bar()
{
    double x;
    foo(0)+foo(2*x+1);
}
==================================


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
           Keywords|                            |monitored


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug target/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-08-09 01:49 -------
: Search converges between 2004-05-23-trunk (#458) and 2004-06-01-trunk (#459).

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |15832


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug target/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2004-08-25 16:38 -------
The failure was introduced with the same patch as in PR15382.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug target/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2004-08-25 16:39 -------
Sorry, this should be PR15832.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug target/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[pinskia at gcc dot gnu dot org]

-- 
Bug 16283 depends on bug 15832, which changed state.

Bug 15832 Summary: [3.5 Regression] ICE in move_for_stack_reg, at reg-stack.c:1120
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15832

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283

[Bug target/16283] [3.5 regression] ICE subst_stack_regs_pat, at reg-stack.c:1638 at gcc -O2

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2004-09-07 12:42 -------
Fixed on mainline.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16283