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-fprofile-arcs and -fbranch-probabilities
- To: egcs at cygnus dot com
- Subject: -fprofile-arcs and -fbranch-probabilities
- From: "G. Sumner Hayes" <zumner at collegium dot adsl dot net dot cmu dot edu>
- Date: Fri, 5 Dec 1997 21:49:36 -0500
- Organization: The Good Guys(TM)
- Reply-To: zumner at collegium dot adsl dot net dot cmu dot edu
Are -fprofile-arcs and -fbranch-probabilities supposed to be stable
in egcs-1.0, or are they still under development?
Compiling with -fprofile-arcs works fine and running the resulting
executable generates many .da files; trying to compile the results
with -fbranch-probabilities gives mixed results. Some files compile
fine. Some have warnings (shown below). Some cause cc1 to get fatal
signal 6 and die (shown below). If this is expected, fine; if not,
any ideas what's causing it?
Warnings are often of this form:
../bbox.c: In function `Destroy_Bounding_Slabs':
../bbox.c:1909: warning: Arc profiling: some arc counts were bad.
../bbox.c: In function `Destroy_BBox_Tree':
../bbox.c:1909: warning: Arc profiling: some arc counts were bad.
../bbox.c: In function `Create_Rayinfo':
../bbox.c:1909: warning: Arc profiling: some arc counts were bad.
../bbox.c: In function `create_bbox_node':
../bbox.c:1909: warning: Arc profiling: some arc counts were bad.
../bbox.c: In function `calc_bbox':
../bbox.c:1909: warning: Arc profiling: some arc counts were bad.
../bbox.c: At top level:
../bbox.c:1909: warning: .da file contents not exhausted
Some files die with errors like the following:
../boxes.c: In function `Intersect_Box':
../boxes.c:528: internal error--unrecognizable insn:
(jump_insn/s 92 91 94 (set (pc)
(if_then_else (le (cc0)
(const_int 10000))
(label_ref 157)
(pc))) -1 (insn_list:REG_DEP_ANTI 82 (insn_list:REG_DEP_ANTI 84 (insn_list 89 (insn_list 88 (nil)))))
(expr_list:REG_BR_PROB (const_int 5809)
(nil)))
gcc: Internal compiler error: program cc1 got fatal signal 6
Thanks for your time,
Sumner
--
rage, rage against the dying of the light