following testcase ICEs with >= -O2 for a few days now:
=== Cut ===
extern int *__errno_location (void) throw () __attribute__ ((__const__));
typedef union {
double d;
unsigned L[2];
} U;
void kjs_strtod()
{
int rv, e1;
unsigned z;
if (e1 > 308) { ovfl: (*__errno_location ()) = 34; }
((U*)&rv)->d *= 1e16;
if ((z = ((U*)&rv)->L[1] & 0x7ff00000) > 0x100000)
goto ovfl;
}
=== Cut===
#1 0x081f2e1b in add_virtual_operand (var=<value optimized out>, s_ann=<value
optimized out>,
flags=<value optimized out>, full_ref=0xb7d22140, offset=0, size=64,
for_clobber=0 '\0')
at tree-ssa-operands.c:979
#2 0x081f7ecb in get_indirect_ref_operands (stmt=0xb7d1b1d4, expr=0xb7d95b00,
flags=1,
full_ref=0xb7d22140, offset=0, size=64, recurse_on_base=0 '\0') at
tree-ssa-operands.c:1116
#3 0x081f4105 in get_expr_operands (stmt=0xb7d1b1d4, expr_p=0xb7d1b1f0,
flags=3)
at tree-ssa-operands.c:1617
#4 0x081f5380 in parse_ssa_operands (stmt=0xb7d1b1d4) at
tree-ssa-operands.c:1763
#5 0x081f5be4 in build_ssa_operands (stmt=0xb7d1b1d4) at
tree-ssa-operands.c:1825
#6 0x081f6ec1 in update_stmt_operands (stmt=0xb7d1b1d4) at
tree-ssa-operands.c:1867
#7 0x081b5569 in mark_new_vars_to_rename (stmt=0xb7d1b1d4) at
tree-flow-inline.h:280
#8 0x08246a56 in substitute_and_fold (prop_value=0x87cf580, use_ranges_p=0
'\0')
at tree-ssa-propagate.c:1154
#9 0x081ef1be in execute_copy_prop (store_copy_prop=<value optimized out>,
phis_only=<value optimized out>) at tree-ssa-copy.c:914
#10 0x081ef34f in do_copy_prop () at tree-ssa-copy.c:1048
#11 0x085023fb in execute_one_pass (pass=0x86f8040) at passes.c:863
#12 0x085025a7 in execute_pass_list (pass=0x86f8040) at passes.c:910
#13 0x085025ba in execute_pass_list (pass=0x86f7d40) at passes.c:911
#14 0x081bf996 in tree_rest_of_compilation (fndecl=0xb7dcbc80) at
tree-optimize.c:418
#15 0x0812a906 in expand_body (fn=0xb7dcbc80) at semantics.c:3009
#16 0x085512b5 in cgraph_expand_function (node=0xb7dcbd00) at cgraphunit.c:1102
#17 0x08553d1b in cgraph_optimize () at cgraphunit.c:1167
#18 0x080d3cf5 in cp_finish_file () at decl2.c:3110
#19 0x0819106f in c_common_parse_file (set_yydebug=0) at c-opts.c:1166
#20 0x084ce803 in toplev_main (argc=14, argv=0xbfae7bb4) at toplev.c:999
#21 0x0819e1b2 in main (argc=0, argv=0xb7dcd508) at main.c:35
--
Summary: ICE in in add_virtual_operand
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mueller at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26626
