[Bug other/82327] New: [7 Regression] ICE in equal_mem_array_ref_p, at tree-ssa-scopedtables.c:429 (i686-linux-gnu)

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82327

            Bug ID: 82327
           Summary: [7 Regression] ICE in equal_mem_array_ref_p, at
                    tree-ssa-scopedtables.c:429 (i686-linux-gnu)
           Product: gcc
           Version: 7.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

Created attachment 42236
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42236&action=edit
preprocessed source

seen on the gcc-7-branch, introduced within the last two weeks, on
i686-linux-gnu, compiler configured to default to PIE.

$ g++ -std=c++11 -c -g -O2 -fPIC -fno-exceptions  InstCombineAddSub.ii 
/home/packages/llvm/llvm-toolchain-3.8-3.8.1/lib/Transforms/InstCombine/InstCombineAddSub.cpp:
In function 'llvm::Value*
{anonymous}::FAddCombine::simplify(llvm::Instruction*)':
/home/packages/llvm/llvm-toolchain-3.8-3.8.1/lib/Transforms/InstCombine/InstCombineAddSub.cpp:518:8:
internal compiler error: in equal_mem_array_ref_p, at
tree-ssa-scopedtables.c:429
 Value *FAddCombine::simplify(Instruction *I) {
        ^~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.

creduce doesn't make any progress to reduce the test case.