https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87745
Bug ID: 87745
Summary: [9 regression] ICE in get_later_stmt, at
tree-vectorizer.h:1109
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Target: aarch64, arm, i?86, x86_64
Between 20181023 (r265430) and 20181024 (r265465), two testsuite regressions
appeared on Solaris 11/x86, both 32 and 64-bit:
+FAIL: gfortran.fortran-torture/execute/where_1.f90, -O3 -g (internal
compiler error)
+FAIL: gfortran.fortran-torture/execute/where_6.f90, -O3 -g (internal
compiler error)
According to gcc-testresults, they also occur on aarch64 and arm.
The log shows
during GIMPLE pass: vect
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gfortran.fortran-torture/execute/where_6.f90:23:0:
internal compiler error: in get_later_stmt, at tree-vectorizer.h:1109
0x9a590a7 get_later_stmt
/vol/gcc/src/hg/trunk/local/gcc/tree-vectorizer.h:1109
0x9a59274 get_later_stmt
/vol/gcc/src/hg/trunk/local/gcc/tree-vect-data-refs.c:220
0x9a59274 vect_preserves_scalar_order_p
/vol/gcc/src/hg/trunk/local/gcc/tree-vect-data-refs.c:221
0x9a49cb8 vect_analyze_data_ref_dependence
/vol/gcc/src/hg/trunk/local/gcc/tree-vect-data-refs.c:453
0x9a49cb8 vect_analyze_data_ref_dependences(_loop_vec_info*, unsigned int*)
/vol/gcc/src/hg/trunk/local/gcc/tree-vect-data-refs.c:559
0x9339749 vect_analyze_loop_2
/vol/gcc/src/hg/trunk/local/gcc/tree-vect-loop.c:1849
0x9339749 vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*)
/vol/gcc/src/hg/trunk/local/gcc/tree-vect-loop.c:2268
0x9359b05 try_vectorize_loop_1
/vol/gcc/src/hg/trunk/local/gcc/tree-vectorizer.c:873
0x935a368 try_vectorize_loop
/vol/gcc/src/hg/trunk/local/gcc/tree-vectorizer.c:1015
0x935a87a vectorize_loops()
/vol/gcc/src/hg/trunk/local/gcc/tree-vectorizer.c:1097
which suggests this might have been caused by
2018-10-24 Richard Biener <rguent...@suse.de>
PR tree-optimization/87665
* tree-vect-data-refs.c (vect_preserves_scalar_order_p): Adjust
to reflect reality.
* gcc.dg/torture/pr87665.c: New testcase.
