https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90240
Bug ID: 90240
Summary: [9 Regression] ICE in try_improve_iv_set, at
tree-ssa-loop-ivopts.c:6694
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Probably a GCC 9 regression:
$ cat ice.f
PARAMETER (n=1335, N2=1335)
COMMON a(n,N2), b(n,N2), c(n,N2),
* d(n,N2),
2 e(n,N2), f(n,N2),
* g(n,N2), h(n,N2)
DO 200 j=1,i
DO 200 k=1,l
a(k,j) = c(k,j)*g(k,j)*f(k+1,m)+f(k,m)+f(k,j)
2 +f(k+1,j)*h(k+1,j)
b(k,j+1) = d(k,j+1)*g(k,m)+g(k,j+1)
1 *e(k,m)+e(k,j+1)+e(k,j)+e(k+1,j)
2 *h(k,j+1)-h(k,j)
200 CONTINUE
END
$ /home/marxin/Programming/gcc2/objdir/gcc/xgcc
-B/home/marxin/Programming/gcc2/objdir/gcc/ -floop-nest-optimize -O1 ice.f -c
ice.f:7:72:
7 | DO 200 k=1,l
|
1
Warning: Fortran 2018 deleted feature: Shared DO termination label 200 at (1)
during GIMPLE pass: ivopts
ice.f:14:0:
14 | END
|
internal compiler error: in try_improve_iv_set, at tree-ssa-loop-ivopts.c:6694
0x13f848a try_improve_iv_set
../../gcc/tree-ssa-loop-ivopts.c:6694
0x13f85aa find_optimal_iv_set_1
../../gcc/tree-ssa-loop-ivopts.c:6724
0x13f8658 find_optimal_iv_set
../../gcc/tree-ssa-loop-ivopts.c:6746
0x13fb851 tree_ssa_iv_optimize_loop
../../gcc/tree-ssa-loop-ivopts.c:7599
0x13fb9aa tree_ssa_iv_optimize()
../../gcc/tree-ssa-loop-ivopts.c:7637
0x142b6d9 execute
../../gcc/tree-ssa-loop.c:513
