[Bug bootstrap/53321] [4.8 Regression] LTO bootstrap failed with bootstrap-profiled

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53321

Steven Bosscher <steven at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |steven at gcc dot gnu.org

--- Comment #11 from Steven Bosscher <steven at gcc dot gnu.org> 2012-05-26 19:39:28 UTC ---
At the point of the ICE:
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /home/stevenb/devel/build-test2/gcc/cc1plus -quiet -O2
-fprofile-generate t.cc

Breakpoint 2, internal_error (gmsgid=0x18d10b8 "vector %s %s domain error, in
%s at %s:%u") at ../../trunk/gcc/diagnostic.c:955
955       va_start (ap, gmsgid);
(gdb) up 4
#4  0x00000000009bc54c in cgraph_propagate_frequency_1 (node=0x7ffff70d5888,
data=0x7fffffffde40) at ../../trunk/gcc/cgraph.c:1805
1805              if (inline_edge_summary (edge)->loop_depth)
(gdb) p debug_cgraph()
callgraph:

__gcov_indirect_call_profiler/25 (<built-in>) @0x7ffff72603a8
  Type: function
  Visibility: external public artificial
  References:
  Referring:
  Availability: not_available
  Function flags:
  Called by: main/3 (1.00 per call)
  Calls:
__gcov_ior_profiler/24 (<built-in>) @0x7ffff7260138
  Type: function
  Visibility: external public artificial
  References:
  Referring:
  Availability: not_available
  Function flags:
  Called by: _ZL11find_sourcePKc.isra.0/9 (1.00 per call)
  Calls:
__gcov_average_profiler/23 (<built-in>) @0x7ffff7260000
  Type: function
  Visibility: external public artificial
  References:
  Referring:
  Availability: not_available
  Function flags:
  Called by: _ZL11find_sourcePKc.isra.0/9 (1.00 per call)
  Calls:
__gcov_one_value_profiler/22 (<built-in>) @0x7ffff70d59c0
  Type: function
  Visibility: external public artificial
  References:
  Referring:
  Availability: not_available
  Function flags:
  Called by: _ZL11find_sourcePKc.isra.0/9 (1.00 per call)
  Calls:
_ZL11find_sourcePKc.isra.0/9 (void _ZL11find_sourcePKc.isra.0())
@0x7ffff70d5ea0
  Type: function
  Visibility: artificial
  References: long int __gcov0._ZL11find_sourcePKc.isra.0 [1]/12 (read)long int
__gcov0._ZL11find_sourcePKc.isra.0 [1]/12 (write)int n_sources/5 (read)char*
sources/6 (read)char* src/7 (read)long int __gcov3._ZL11find_sourcePKc.isra.0
[3]/13 (addr)long int __gcov6._ZL11find_sourcePKc.isra.0 [2]/14 (addr)long int
__gcov7._ZL11find_sourcePKc.isra.0 [1]/15 (addr)
  Referring:
  Availability: local
  Function flags: analyzed body local finalized
  Called by: _ZL15read_graph_filev/1 (1.00 per call)
  Calls: void* memcpy(void*, const void*, size_t)/8 (1.00 per call)
__gcov_ior_profiler/24 (1.00 per call) __gcov_average_profiler/23 (1.00 per
call) __gcov_one_value_profiler/22 (1.00 per call)
void* memcpy(void*, const void*, size_t)/8 (void* memcpy(void*, const void*,
size_t)) @0x7ffff70d5d68
  Type: function
  Visibility: external public visibility_specified
  References:
  Referring:
  Availability: not_available
  Function flags:
  Called by: _ZL11find_sourcePKc.isra.0/9 (1.00 per call)
  Calls:
const char* gcov_read_string()/4 (const char* gcov_read_string())
@0x7ffff70d5c30
  Type: function
  Visibility: external public
  References:
  Referring:
  Availability: not_available
  Function flags:
  Called by: _ZL15read_graph_filev/1 (1.00 per call) (can throw external)
  Calls:
main/3 (int main()) @0x7ffff70d5af8
  Type: function
  Visibility: public
  Address is taken.
  References: long int* __gcov_indirect_call_counters/11 (read)void*
__gcov_indirect_call_callee/10 (read)main/3 (addr)void*
__gcov_indirect_call_callee/10 (write)long int __gcov0.main [2]/16 (read)long
int __gcov0.main [2]/16 (write)long int __gcov0.main [2]/16 (read)long int
__gcov0.main [2]/16 (write)
  Referring: main/3 (addr)
  Availability: available
  Function flags: analyzed body finalized only_called_at_startup
  Called by:
  Calls: _ZL15read_graph_filev/1 (1.00 per call) (can throw external)
__gcov_indirect_call_profiler/25 (1.00 per call)
_ZL15read_graph_filev/1 (void read_graph_file()) @0x7ffff70d5888
  Type: function
  Visibility: prevailing_def_ironly
  References: long int __gcov0._ZL15read_graph_filev [3]/17 (read)long int
__gcov0._ZL15read_graph_filev [3]/17 (write)long int
__gcov0._ZL15read_graph_filev [3]/17 (read)long int
__gcov0._ZL15read_graph_filev [3]/17 (write)long int
__gcov0._ZL15read_graph_filev [3]/17 (read)long int
__gcov0._ZL15read_graph_filev [3]/17 (write)
  Referring:
  Availability: local
  Function flags: analyzed body local finalized
  Called by: main/3 (1.00 per call) (can throw external)
  Calls: _ZL11find_sourcePKc.isra.0/9 (1.00 per call) const char*
gcov_read_string()/4 (1.00 per call) (can throw external)
$41 = void

Note the isra function. The ICE goes away with -fno-ipa-sra, and can be
triggered with "-O1 -fipa-sra -fprofile-generate".