[Bug tree-optimization/71170] New: [7 Regression] ICE in rewrite_expr_tree, at tree-ssa-reassoc.c:3898

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71170

            Bug ID: 71170
           Summary: [7 Regression] ICE in rewrite_expr_tree, at
                    tree-ssa-reassoc.c:3898
           Product: gcc
           Version: 7.0
            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: ---

After r236356, I see various ICE in test-suite on x86_64:

./xgcc -B.
/home/marxin/Programming/gcc3/gcc/testsuite/gcc.dg/tree-ssa/slsr-30.c -c -O1
-fwrapv
/home/marxin/Programming/gcc3/gcc/testsuite/gcc.dg/tree-ssa/slsr-30.c: In
function ‘f’:
/home/marxin/Programming/gcc3/gcc/testsuite/gcc.dg/tree-ssa/slsr-30.c:8:1:
internal compiler error: in rewrite_expr_tree, at tree-ssa-reassoc.c:3898
 f (int s, long c)
 ^
0x1044443 rewrite_expr_tree
        ../../gcc/tree-ssa-reassoc.c:3897
0x1044241 rewrite_expr_tree
        ../../gcc/tree-ssa-reassoc.c:3862
0x1047c72 reassociate_bb
        ../../gcc/tree-ssa-reassoc.c:5249
0x1047e08 reassociate_bb
        ../../gcc/tree-ssa-reassoc.c:5278
0x1048346 do_reassoc
        ../../gcc/tree-ssa-reassoc.c:5392
0x104865b execute_reassoc
        ../../gcc/tree-ssa-reassoc.c:5479
0x104876d execute
        ../../gcc/tree-ssa-reassoc.c:5518

Thanks