https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108547
Bug ID: 108547
Summary: ice in decompose, at wide-int.h:984 for -O2 with -Wall
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
This legal C source code:
int li_4, li_5, us_8;
unsigned char func_7_ptr_13, func_7_uc_14;
void func_7_ptr_18() {
if (li_5) {
for (;;)
;
short s_15;
for (; func_7_uc_14;) {
us_8 = 7;
for (; us_8; us_8 += 1)
lblD2AF1FAB:
if (us_8)
li_4 = 1;
func_7_uc_14 += func_7_ptr_18;
if (func_7_ptr_13 & 1 && (func_7_uc_14 &= func_7_ptr_13))
s_15 %= func_7_uc_10li_19(s_15);
}
}
goto lblD2AF1FAB;
}
when compiled with recent gcc trunk, does this:
$ ~/gcc/results//bin/gcc -c -O2 -Wall bug876.c
bug876.c: In function ‘func_7_ptr_18’:
bug876.c:14:20: warning: assignment to ‘unsigned char’ from ‘void (*)()’ makes
integer from pointer without a cast [-Wint-conversion]
14 | func_7_uc_14 += func_7_ptr_18;
| ^~
bug876.c:16:17: warning: implicit declaration of function ‘func_7_uc_10li_19’
[-Wimplicit-function-declaration]
16 | s_15 %= func_7_uc_10li_19(s_15);
| ^~~~~~~~~~~~~~~~~
during GIMPLE pass: uninit
bug876.c:3:6: internal compiler error: in decompose, at wide-int.h:984
3 | void func_7_ptr_18() {
| ^~~~~~~~~~~~~
0x1df0eb9 value_sat_pred_p(tree_node*, tree_node*, tree_code, bool)
../../trunk.d1/gcc/wide-int.h:0
The bug first seems to appear sometime before git hash g:9b111debbfb79a0a
dated 20221229.
