GCC trunk gets an internal compiler error when building SPEC CPU2000 test
197.parser with "-O2 -fselective-scheduling -fsel-sched-pipelining" on
powerpc-linux, as demonstrated by this minimized testcase:
-----------------------------------------------------------------------
extern int N_words;
typedef struct DIS_node_struct DIS_node;
typedef struct CON_list_struct CON_list;
struct DIS_node_struct
{
CON_list *cl;
};
void
build_DIS_CON_tree (void)
{
int w;
DIS_node *dnroot, *dn;
CON_list *child, *xchild;
for (w = 0; w < N_words; w++)
{
if (dnroot == ((void *) 0))
{
dnroot = dn;
for (child = dn->cl; child != ((void *) 0); child = xchild)
{
}
}
}
}
-----------------------------------------------------------------------
elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gcc -O2
-fselective-scheduling -fsel-sched-pipelining -c bug.c
bug.c: In function build_DIS_CON_tree:
bug.c:26:1: internal compiler error: in verify_backedges, at
sel-sched-ir.c:3498
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
The failure starts with this very large patch (Expand from SSA):
http://gcc.gnu.org/viewcvs?view=rev&rev=146817
r146817 | matz | 2009-04-26 19:35:04 +0000 (Sun, 26 Apr 2009)
--
Summary: ICE in verify_backedges for 197.parser with sel-sched
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42245
