[Bug target/78516] [7 Regression] ICE in lra_assign for e500v2

[jsm28 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78516

--- Comment #12 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Created attachment 40373
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40373&action=edit
fnmatch.i preprocessed source

With that new LRA patch (plus the previous gcc-pr78516.v2.diff) I get an ICE
building glibc again.  Preprocessed source attached.  Compile with:

powerpc-linux-gnuspe-gcc -S -std=gnu11 -fgnu89-inline  -O2
-fmerge-all-constants -g -mlong-double-128 -ftls-model=initial-exec fnmatch.i

In file included from fnmatch.c:321:0:
fnmatch_loop.c: In function 'internal_fnwmatch':
fnmatch_loop.c:999:1: internal compiler error: Segmentation fault
0x8784a4a crash_signal
        /scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/toplev.c:333
0x861e590 lra_eliminate_reg_if_possible(rtx_def**)
       
/scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/lra-eliminations.c:1385
0x860dd08 in_class_p
       
/scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/lra-constraints.c:257
0x8613721 process_alt_operands
       
/scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/lra-constraints.c:2239
0x8619052 curr_insn_transform
       
/scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/lra-constraints.c:3720
0x861be7a lra_constraints(bool)
       
/scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/lra-constraints.c:4706
0x8606dbe lra(_IO_FILE*)
        /scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/lra.c:2377
0x85bdf74 do_reload
        /scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/ira.c:5400
0x85bdf74 execute
        /scratch/jmyers/glibc/pe500-mainline/src/gcc-mainline/gcc/ira.c:5584
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.