[Bug target/64938] New: [4.9 Regression] ICE in symtab_remove_unreachable_nodes, at ipa.c:547 on arm-linux-gnueabihf

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64938

            Bug ID: 64938
           Summary: [4.9 Regression] ICE in
                    symtab_remove_unreachable_nodes, at ipa.c:547 on
                    arm-linux-gnueabihf
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org

Created attachment 34668
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34668&action=edit
test case

$ arm-linux-gnueabihf-gcc -c -g -O2 -std=c++11 -Wno-attributes
-Wno-non-template-friend test.ii 
test.ii:66:53: internal compiler error: in symtab_remove_unreachable_nodes, at
ipa.c:547
 H<J *> Scopes::favScopes() const { return m_scopes; }
                                                     ^
Please submit a full bug report,
with preprocessed source if appropriate.

configured with --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard
--with-mode=thumb

not seen on the trunk, introduced by backporting the fix for PR63970. Reverting
this backport lets the test case build.