[Bug target/78458] New: [7 Regression] LRA ICE building libgcc for powerpc-linux-gnuspe e500v2

["jsm28 at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78458

            Bug ID: 78458
           Summary: [7 Regression] LRA ICE building libgcc for
                    powerpc-linux-gnuspe e500v2
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jsm28 at gcc dot gnu.org
  Target Milestone: ---
            Target: powerpc-linux-gnuspe

Created attachment 40103
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40103&action=edit
preprocessed source

GCC mainline has an ICE in LRA when building libgcc for powerpc-linux-gnuspe
target (configured with --enable-e500-double and --with-glibc-version=2.24 to
get the relevant handling of DFmode and TFmode).  I'll attach preprocessed
source of the relevant libgcc file.  Compile with: -g -O2 -fPIC
-mlong-double-128 -mno-minimal-toc -fbuilding-libgcc -fno-stack-protector -S
multc3.i

/scratch/jmyers/glibc/many7/src/gcc/libgcc/libgcc2.c: In function '__multc3':
/scratch/jmyers/glibc/many7/src/gcc/libgcc/libgcc2.c:2035:1: internal compiler
error: in lra_set_insn_recog_data, at lra.c:965
 }
 ^
0x9b41cc lra_set_insn_recog_data(rtx_insn*)
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra.c:963
0x9b43ef lra_get_insn_recog_data
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra-int.h:487
0x9b43ef lra_update_insn_regno_info(rtx_insn*)
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra.c:1585
0x9b46bf lra_update_insn_regno_info(rtx_insn*)
        /scratch/jmyers/glibc/many7/src/gcc/gcc/vec.h:1447
0x9b46bf lra_push_insn_1
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra.c:1736
0x9b46bf lra_push_insn(rtx_insn*)
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra.c:1744
0x9b46bf push_insns
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra.c:1787
0x9b5f2d lra_process_new_insns(rtx_insn*, rtx_insn*, rtx_insn*, char const*)
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra.c:1835
0x9c15f8 split_reg
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra-constraints.c:5370
0x9c2134 inherit_in_ebb
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra-constraints.c:6179
0x9c6b23 lra_inheritance()
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra-constraints.c:6249
0x9b6d52 lra(_IO_FILE*)
        /scratch/jmyers/glibc/many7/src/gcc/gcc/lra.c:2403
0x96c231 do_reload
        /scratch/jmyers/glibc/many7/src/gcc/gcc/ira.c:5381
0x96c231 execute
        /scratch/jmyers/glibc/many7/src/gcc/gcc/ira.c:5565
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.