http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45865
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-06 01:11:30
UTC ---
A simple testcase:
[...@gnu-32 rrs]$ cat pr45865.c
typedef struct rtx_def *rtx;
enum machine_mode {
VOIDmode,
CCFPmode,
CCFPUmode,
MAX_MACHINE_MODE
};
enum mode_class {
MODE_CC,
MODE_FLOAT,
MODE_COMPLEX_FLOAT,
MODE_VECTOR_FLOAT
};
extern const enum mode_class mode_class[(int) MAX_MACHINE_MODE];
enum rtx_code {
UNKNOWN,
GEU,
ORDERED,
CONST_INT
};
struct rtx_def {
unsigned int code: 16;
unsigned int mode : 8;
};
extern enum rtx_code reverse_condition (enum rtx_code);
enum rtx_code
reversed_comparison_code_parts (enum rtx_code code, rtx insn, rtx arg0,
rtx arg1)
{
enum machine_mode mode;
mode = (enum machine_mode) (arg0)->mode;
if (mode == VOIDmode)
mode = (enum machine_mode) (arg1)->mode;
if ((mode_class[(int) (mode)]) == MODE_CC)
return (mode != CCFPmode && mode != CCFPUmode
? reverse_condition (code)
: reverse_condition_maybe_unordered (code));
switch (code)
{
case GEU:
return reverse_condition (code);
case ORDERED:
return UNKNOWN;
}
if (((enum rtx_code) (arg0)->code) == CONST_INT
|| (((enum machine_mode) (arg0)->mode) != VOIDmode
&& ! ((mode_class[(int) (mode)]) == MODE_FLOAT
|| (mode_class[(int) (mode)]) == MODE_COMPLEX_FLOAT
|| (mode_class[(int) (mode)]) == MODE_VECTOR_FLOAT)))
return reverse_condition (code);
return UNKNOWN;
}
[...@gnu-32 rrs]$ /export/gnu/import/rrs/164914/usr/bin/gcc -O2 -S -m32
pr45865.c
pr45865.c: In function \u2018reversed_comparison_code_parts\u2019:
pr45865.c:52:1: internal compiler error: in dwarf2out_cfi_begin_epilogue, at
dwarf2out.c:2930
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[...@gnu-32 rrs]$
