[Bug middle-end/42127] Verify_flow_info: Wrong frequency of block. Profiled bootstrap failed.

[hubicka at gcc dot gnu dot org]

--- Comment #4 from hubicka at gcc dot gnu dot org  2009-11-23 22:04 ---
Fixed.


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hubicka at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution||FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42127

[Bug middle-end/42127] Verify_flow_info: Wrong frequency of block. Profiled bootstrap failed.

[d dot g dot gorbachev at gmail dot com]

--- Comment #1 from d dot g dot gorbachev at gmail dot com  2009-11-21 
13:40 ---
This maybe related to r154291 (tree-optimize.c (execute_fixup_cfg): Rescale
frequencies.) Counts are not rescaled for entry block and exit block. Then in
counts_to_freqs(), their frequencies become very large. Then overflow into a
negative number in EDGE_FREQUENCY() in find_many_sub_basic_blocks().


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42127

[Bug middle-end/42127] Verify_flow_info: Wrong frequency of block. Profiled bootstrap failed.

[b3timmons at speedymail dot org]

--- Comment #2 from b3timmons at speedymail dot org  2009-11-21 17:37 
---
(In reply to comment #0)
 GCC 4.5.0 20091119 (r154346)
 
 ../../gcc-4.5/gcc/gengtype-parse.c: In function
 ‘array_and_function_declarators_opt’:
 ../../gcc-4.5/gcc/gengtype-parse.c:508:1: error: verify_flow_info: Wrong
 frequency of block 13 -184951
 ../../gcc-4.5/gcc/gengtype-parse.c:508:1: internal compiler error:
 verify_flow_info failed
 

Also happens on x86_64-unknown-linux-gnu under r154408:

../../gcc/gcc/c-parser.c: In function ‘c_parser_next_token_is’:
../../gcc/gcc/c-parser.c:336:1: error: verify_flow_info: Wrong frequency of
block 7 -199641


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b3timmons at speedymail dot org changed:

   What|Removed |Added

 CC||b3timmons at speedymail dot
   ||org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42127

[Bug middle-end/42127] Verify_flow_info: Wrong frequency of block. Profiled bootstrap failed.

[hubicka at ucw dot cz]

--- Comment #3 from hubicka at ucw dot cz  2009-11-21 18:54 ---
Subject: Re:  Verify_flow_info: Wrong frequency of block. Profiled bootstrap
failed.

 
 
 --- Comment #2 from b3timmons at speedymail dot org  2009-11-21 17:37 
 ---
 (In reply to comment #0)
  GCC 4.5.0 20091119 (r154346)
  
  ../../gcc-4.5/gcc/gengtype-parse.c: In function
  ‘array_and_function_declarators_opt’:
  ../../gcc-4.5/gcc/gengtype-parse.c:508:1: error: verify_flow_info: Wrong
  frequency of block 13 -184951
  ../../gcc-4.5/gcc/gengtype-parse.c:508:1: internal compiler error:
  verify_flow_info failed
  
 
 Also happens on x86_64-unknown-linux-gnu under r154408:
 
 ../../gcc/gcc/c-parser.c: In function ‘c_parser_next_token_is’:
 ../../gcc/gcc/c-parser.c:336:1: error: verify_flow_info: Wrong frequency of
 block 7 -199641

Looks like overflow in frequency scaling.  I will look into this.

Honza


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42127