[Bug c/47140] New: error: conversion of register to a different size

[Bug c/47140] New: error: conversion of register to a different size

[regehr at cs dot utah.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47140

           Summary: error: conversion of register to a different size
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: regehr@cs.utah.edu
                CC: chenyang@cs.utah.edu


There are several verify_stmts failed problems pending, but this one looks
different.  Apologies if it's a dup.


[regehr@gamow tmp434]$ current-gcc -c -O2 small.c

small.c: In function 'uint321':
small.c:33:5: error: conversion of register to a different size
VIEW_CONVERT_EXPR<int>(D.2762_32);

pretmp.6_33 = VIEW_CONVERT_EXPR<int>(D.2762_32);

small.c:33:5: internal compiler error: verify_stmts failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

[regehr@gamow tmp434]$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r168380-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r168380-install
--program-prefix=r168380- --enable-languages=c,c++
Thread model: posix
gcc version 4.6.0 20101231 (experimental) (GCC) 

[regehr@gamow tmp434]$ cat small.c

typedef short int int16_t;
typedef int int32_t;
typedef unsigned char uint8_t;
typedef unsigned short int uint16_t;

static int32_t
safe_mod_func_int32_t_s_s (int32_t si1, int16_t si2)
{
  return si2 == 0 || si1 == -2147483647 - 1 && si2 ? si1 : si1 + si2;
}

static uint8_t
safe_add_func_uint8_t_u_u (uint8_t ui1, uint8_t ui2)
{
  return ui1 + ui2;
}

static uint16_t
safe_sub_func_uint16_t_u_u (uint16_t ui1, uint8_t ui2)
{
  return ui1 - ui2;
}

int16_t g_32;
int16_t g_76[7][10] = {
};

volatile int32_t g_98[1][1] = {
};

volatile int32_t *g_97 = &g_98[0][0];

int uint321 (void)
{
  for (0;; 1)
    *g_97 =
      safe_mod_func_int32_t_s_s (safe_add_func_uint8_t_u_u
                 (1,
                  func_21 (g_32,
                       g_76[5][5])) >=
                 safe_sub_func_uint16_t_u_u (&g_97 == 0, 1),
                 0);
}

[Bug tree-optimization/47140] [4.6 Regression] error: conversion of register to a different size

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47140

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.5.2
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|                            |2011.01.01 14:33:23
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org
     Ever Confirmed|0                           |1
            Summary|error: conversion of        |[4.6 Regression] error:
                   |register to a different     |conversion of register to a
                   |size                        |different size
   Target Milestone|---                         |4.6.0
      Known to fail|                            |4.6.0

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-01 14:33:23 UTC ---
Caused by http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=162943
Smaller testcase:
static int
foo (int x, short y)
{
  return y == 0 ? x : x + y;
}

static unsigned short
bar (unsigned short x, unsigned char y)
{
  return x - y;
}

int w;

int baz (void);

int
test (void)
{
  for (;;)
    w = foo ((unsigned char) (1 + baz ()) >= bar (0, 1), 0);
}

[Bug tree-optimization/47140] [4.6 Regression] error: conversion of register to a different size

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47140

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-01 15:26:01 UTC ---
Created attachment 22877
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22877
gcc46-pr47140.patch

Untested fix.

[Bug tree-optimization/47140] [4.6 Regression] error: conversion of register to a different size

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47140

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-02 17:09:11 UTC ---
Author: jakub
Date: Sun Jan  2 17:09:08 2011
New Revision: 168402

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168402
Log:
    PR tree-optimization/47140
    * tree-ssa-ccp.c (evaluate_stmt): For binary assignments, use
    TREE_TYPE (lhs) instead of TREE_TYPE (rhs1) as second argument
    to bit_value_binop.

    * gcc.c-torture/compile/pr47140.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr47140.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c

[Bug tree-optimization/47140] [4.6 Regression] error: conversion of register to a different size

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47140

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-02 17:24:32 UTC ---
Fixed.