[Bug tree-optimization/102752] New: [12 Regression] Recent change to ldist causing ICE on msp430-elf, rl78-elf, and xstormy16-elf

["law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102752

            Bug ID: 102752
           Summary: [12 Regression] Recent change to ldist causing ICE on
                    msp430-elf, rl78-elf, and xstormy16-elf
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: law at gcc dot gnu.org
  Target Milestone: ---

After this change:


msp430-elf, rl78-elf and xstormy16-elf are all getting an ICE on
gcc.c-torture/execute/

>From the msp430-elf gcc.log file:

/home/jlaw/jenkins/workspace/msp430-elf/gcc/gcc/testsuite/gcc.c-torture/execute/20100827-1.c:
In function 'foo':^M
/home/jlaw/jenkins/workspace/msp430-elf/gcc/gcc/testsuite/gcc.c-torture/execute/20100827-1.c:3:1:
internal compiler error: tree check: expected class 'type', have 'exceptional'
(ssa_name) in transform_reduction_loop, at tree-loop-distribution.c:3684^M
0x1532ceb tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)^M
        ../../..//gcc/gcc/tree.c:8739^M
0x861c29 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)^M
        ../../..//gcc/gcc/tree.h:3556^M
0x12006d9 loop_distribution::transform_reduction_loop(loop*)^M
        ../../..//gcc/gcc/tree-loop-distribution.c:3684^M
0x1200d92 loop_distribution::execute(function*)^M
        ../../..//gcc/gcc/tree-loop-distribution.c:3776^M
0x12012bd execute^M
        ../../..//gcc/gcc/tree-loop-distribution.c:3901^M
Please submit a full bug report,^M

You should be able to reproduce this with just a cross compiler.  No assembler
or target libraries should be needed.