[Bug middle-end/59350] New: [4.9 regression] ICE: in vt_expand_var_loc_chain, at var-tracking.c:8212

[dimhen at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59350

            Bug ID: 59350
           Summary: [4.9 regression] ICE: in vt_expand_var_loc_chain, at
                    var-tracking.c:8212
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dimhen at gmail dot com

Fedora 19 x86_64

r205459 PASS
r205527 FAIL

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --with-multilib-list=m64
--enable-checking=yes,df,fold,rtl,tree --enable-languages=c,c++,lto
--enable-plugin --with-tune=native --with-arch=native
--enable-version-specific-runtime-libs
Thread model: posix
gcc version 4.9.0 20131129 (experimental) [trunk revision 205527] (GCC) 

$ cat x.ii
struct A {
  int LLVMTy;
} a;
class B;
class C {
  B *Node;
  int ResNo;
public:
  A m_fn1() const;
  void m_fn2() { m_fn1(); }
};
class D {
  void *Ptr;
  int IROrder;
};
class F {
public:
  void m_fn1(int, D, A, C);
};
void fn1();
class B {
  int NumValues;
public:
  void m_fn1(int) { NumValues ? static_cast<void>(0) : fn1(); }
};


$ g++ -fpreprocessed -O1 -g -c x.ii -o x.o
x.ii: In function 'void fn2(C)':
x.ii:31:1: internal compiler error: in vt_expand_var_loc_chain, at
var-tracking.c:8212
 }
 ^
0xf2e719 vt_expand_var_loc_chain
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8212
0xf2e719 vt_expand_loc_callback
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8408
0x93d7b7 cselib_expand_value_rtx_1
    /home/dimhen/src/gcc_current/gcc/cselib.c:1684
0x93e6de cselib_expand_value_rtx_cb(rtx_def*, bitmap_head_def*, int, rtx_def*
(*)(rtx_def*, bitmap_head_def*, int, void*), void*)
    /home/dimhen/src/gcc_current/gcc/cselib.c:1531
0xf2d9fc vt_expand_loc_callback
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8344
0x93d8a9 cselib_expand_value_rtx_1
    /home/dimhen/src/gcc_current/gcc/cselib.c:1649
0x93e6de cselib_expand_value_rtx_cb(rtx_def*, bitmap_head_def*, int, rtx_def*
(*)(rtx_def*, bitmap_head_def*, int, void*), void*)
    /home/dimhen/src/gcc_current/gcc/cselib.c:1531
0xf2de17 vt_expand_var_loc_chain
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8246
0xf2de17 vt_expand_loc_callback
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8408
0x93d7b7 cselib_expand_value_rtx_1
    /home/dimhen/src/gcc_current/gcc/cselib.c:1684
0x93e6de cselib_expand_value_rtx_cb(rtx_def*, bitmap_head_def*, int, rtx_def*
(*)(rtx_def*, bitmap_head_def*, int, void*), void*)
    /home/dimhen/src/gcc_current/gcc/cselib.c:1531
0xf2de17 vt_expand_var_loc_chain
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8246
0xf2de17 vt_expand_loc_callback
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8408
0x93e6de cselib_expand_value_rtx_cb(rtx_def*, bitmap_head_def*, int, rtx_def*
(*)(rtx_def*, bitmap_head_def*, int, void*), void*)
    /home/dimhen/src/gcc_current/gcc/cselib.c:1531
0xf2de17 vt_expand_var_loc_chain
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8246
0xf2de17 vt_expand_loc_callback
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8408
0x93d7b7 cselib_expand_value_rtx_1
    /home/dimhen/src/gcc_current/gcc/cselib.c:1684
0x93e6de cselib_expand_value_rtx_cb(rtx_def*, bitmap_head_def*, int, rtx_def*
(*)(rtx_def*, bitmap_head_def*, int, void*), void*)
    /home/dimhen/src/gcc_current/gcc/cselib.c:1531
0xf22658 vt_expand_var_loc_chain
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8246
0xf22658 vt_expand_1pvar
    /home/dimhen/src/gcc_current/gcc/var-tracking.c:8521
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.