[Bug lto/64795] New: [5.0 regression x86_64] too many memory references for `lea'

[dimhen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64795

            Bug ID: 64795
           Summary: [5.0 regression x86_64] too many memory references for
                    `lea'
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dimhen at gmail dot com

r218766 PASS
r218767 FAIL
r220090 FAIL

Fedora 21 / x86_64

$ cat t.ii
typedef void tf(struct s);
struct s {
  tf *pf;
};
void fn1(void *);
static void fn2(s);
main() {
  static s a;
  fn1(&a);
  a.pf = fn2;
}

$ touch r.ii
$ /home/dimhen/bin/gcc_218767_yes/bin/g++ -fpreprocessed -O -flto -fPIC -DPIC
-c -o r.o r.ii
$ /home/dimhen/bin/gcc_218767_yes/bin/g++ -fpreprocessed -O -flto -c -o t.o
t.ii
$ $ /home/dimhen/bin/gcc_218767_yes/bin/g++ -flto -o x t.o r.o -save-temps
x.ltrans0.s: Assembler messages:
x.ltrans0.s:12: Error: too many memory references for `lea'
lto-wrapper: fatal error: /home/dimhen/bin/gcc_218767_yes/bin/g++ returned 1
exit status
compilation terminated.
/usr/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status

$ cat x.ltrans0.s
    .file    "x.ltrans0.o"
    .text
    .globl    main
    .type    main, @function
main:
.LFB0:
    .cfi_startproc
    subq    $8, %rsp
    .cfi_def_cfa_offset 16
    leaq    _ZZ4mainE1a(%rip), %rdi
    call    _Z3fn1Pv@PLT
    leaq    _ZL3fn21s(%rip), _ZZ4mainE1a(%rip)
    movl    $0, %eax
    addq    $8, %rsp
    .cfi_def_cfa_offset 8
    ret
    .cfi_endproc
.LFE0:
    .size    main, .-main
    .local    _ZZ4mainE1a
    .comm    _ZZ4mainE1a,8,8
    .ident    "GCC: (GNU) 5.0.0 20141215 (experimental) [trunk revision
218767]"
    .section    .note.GNU-stack,"",@progbits

$ /home/dimhen/bin/gcc_218767_yes/bin/g++ -v                     
Using built-in specs.
COLLECT_GCC=/home/dimhen/bin/gcc_218767_yes/bin/g++
COLLECT_LTO_WRAPPER=/home/dimhen/bin/gcc_218767_yes/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/dimhen/src/gcc_r218767/configure
--prefix=/usr/local/gcc_current --enable-static --enable-checking=yes
--enable-languages=c,c++,lto --enable-plugin --disable-libstdcxx-dual-abi
Thread model: posix
gcc version 5.0.0 20141215 (experimental) [trunk revision 218767] (GCC)