https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93179
Bug ID: 93179
Summary: [10 Regression] ICE (segfault) in loop_depth on
x86_64-linux-gnu
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at debian dot org
Target Milestone: ---
seen with trunk r279880, building icu 63.2 on x86_64-linux-gnu (no other
archs), compiler defaulting to hardening defaults. fails with -O1, works with
-O0.
The example isn't completely reduced, however further creduce attempts are
timing out after 300 seconds.
$ cat dtfmttst.ii
class UnicodeString {
public:
enum EInvariant {};
UnicodeString(char );
~UnicodeString();
private:
public:
};
class DateFormat : UnicodeString {
public:
enum EStyle {
kNone};
};
UnicodeString CharsToUnicodeString(const char *);
class DateFormatTest {
void TestNonGregoFmtParse();
public:
private:
private:
};
typedef struct {
int era;
int year;
int month;
int day;
int hour;
int minute;
UnicodeString formattedDate;
} CalAndFmtTestItem;
typedef struct {
const char *locale;
DateFormat::EStyle style;
UnicodeString pattern;
const CalAndFmtTestItem *caftItems;
} TestNonGregoItem;
void DateFormatTest::TestNonGregoFmtParse() {
CalAndFmtTestItem cafti_zh_chinese_custU[] {78, 31, 0, 1, 12, 0, 0};
TestNonGregoItem items[] {"zh@calendar=chinese", DateFormat::kNone,
CharsToUnicodeString("rU\\u5E74MMMd"),
cafti_zh_chinese_custU};
TestNonGregoItem *itemPtr;
for (itemPtr = items; itemPtr->locale != __null; itemPtr++)
;
}
$ g++ -c -std=c++11 -Wall -Wextra -Wpedantic -O1 dtfmttst.ii
during GIMPLE pass: profile_estimate
dtfmttst.ii: In member function 'void DateFormatTest::TestNonGregoFmtParse()':
dtfmttst.ii:46:1: internal compiler error: Segmentation fault
46 | }
| ^
0xbfef43 crash_signal
../../src/gcc/toplev.c:328
0x81d8e6 loop_depth
../../src/gcc/cfgloop.h:529
0x81d8e6 flow_loop_nested_p(loop const*, loop const*)
../../src/gcc/cfgloop.c:66
0x81d8e6 flow_bb_inside_loop_p(loop const*, basic_block_def const*)
../../src/gcc/cfgloop.c:859
0x81d8e6 flow_bb_inside_loop_p(loop const*, basic_block_def const*)
../../src/gcc/cfgloop.c:850
0xd13f34 chain_of_csts_start
../../src/gcc/tree-ssa-loop-niter.c:2883
0xd15764 get_base_for
../../src/gcc/tree-ssa-loop-niter.c:2932
0xd15764 loop_niter_by_eval(loop*, edge_def*)
../../src/gcc/tree-ssa-loop-niter.c:3055
0xb5daed predict_loops
../../src/gcc/predict.c:1988
0xb5eeae tree_estimate_probability(bool)
../../src/gcc/predict.c:3096
0xb5f073 execute
../../src/gcc/predict.c:4034
0xb5f073 execute
../../src/gcc/predict.c:4017
Please submit a full bug report,
with preprocessed source if appropriate.
