Please commit if it is OK for trunk.
Thanks,
Nikolai
On 10/22/2015 06:38 PM, Nikolai Bozhenov wrote:
Hi!
Currently -fsched-verbose option redirects debugging dumps to stderr
if there is no dump_file for the current pass. It would be fine if
there were the only scheduling pass. But for example for AArch64
there are 3 scheduling passes in the default pipeline: sched1,
fusion and sched2. So, when passing options like
-fsched-verbose=7 -fdump-rtl-sched1 to GCC I get a neat dump for
sched1 in the file and a mess of fusion/sched2 logs in the console.
In fact, currently there's no way to tell GCC that I want extremely
verbose logs for sched1 and I want no logs for all other passes.
Especially to the console.
I suggest disabling such redirection in the scheduler and omitting
debugging output for passes without dump_file. I believe a better
way to redirect printing to the stderr is to use options like
-fdump-rtl-sched=stderr. The attached patch implements the
suggestion.
Anyway, the old behavior may be reproduced with options
-fsched-verbose=7 -fdump-rtl-sched1
-fdump-rtl-{sched_fusion,sched2}=stderr
if it is really necessary.
The patch has been bootstrapped and regtested on x86_64.
Thanks,
Nikolai
2015-10-22 Nikolai Bozhenov
* haifa-sched.c (setup_sched_dump): Don't redirect output to stderr.
* common.opt (-fsched-verbose): Set default value to 1.
* invoke.texi (-fsched-verbose): Update the option's description.
diff --git a/gcc/common.opt b/gcc/common.opt
index 961a1b6..757ce85 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -1967,17 +1967,17 @@ fsched-spec-load
Common Report Var(flag_schedule_speculative_load) Optimization
Allow speculative motion of some loads.
fsched-spec-load-dangerous
Common Report Var(flag_schedule_speculative_load_dangerous) Optimization
Allow speculative motion of more loads.
fsched-verbose=
-Common RejectNegative Joined UInteger Var(sched_verbose_param)
+Common RejectNegative Joined UInteger Var(sched_verbose_param) Init(1)
-fsched-verbose= Set the verbosity level of the scheduler.
fsched2-use-superblocks
Common Report Var(flag_sched2_use_superblocks) Optimization
If scheduling post reload, do superblock scheduling.
fsched2-use-traces
Common Ignore
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 4fc7d88..11b8697 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -7415,22 +7415,17 @@ place unique stamps in coverage data files and the object files that
produce them. You can use the @option{-frandom-seed} option to produce
reproducibly identical object files.
The @var{number} should be different for every file you compile.
@item -fsched-verbose=@var{n}
@opindex fsched-verbose
On targets that use instruction scheduling, this option controls the
-amount of debugging output the scheduler prints. This information is
-written to standard error, unless @option{-fdump-rtl-sched1} or
-@option{-fdump-rtl-sched2} is specified, in which case it is output
-to the usual dump listing file, @file{.sched1} or @file{.sched2}
-respectively. However for @var{n} greater than nine, the output is
-always printed to standard error.
+amount of debugging output the scheduler prints to the dump files.
For @var{n} greater than zero, @option{-fsched-verbose} outputs the
same information as @option{-fdump-rtl-sched1} and @option{-fdump-rtl-sched2}.
For @var{n} greater than one, it also output basic block probabilities,
detailed ready list information and unit/insn info. For @var{n} greater
than two, it includes RTL at abort point, control-flow and regions info.
And for @var{n} over four, @option{-fsched-verbose} also includes
dependence info.
diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c
index caadc11..835648b 100644
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -198,27 +198,24 @@ static int modulo_iter0_max_uid;
static int modulo_backtracks_left;
/* The stage in which the last insn from the original loop was
scheduled. */
static int modulo_last_stage;
/* sched-verbose controls the amount of debugging output the
scheduler prints. It is controlled by -fsched-verbose=N:
- N>0 and no -DSR : the output is directed to stderr.
- N>=10 will direct the printouts to stderr (regardless of -dSR).
- N=1: same as -dSR.
+ N=0: no debugging output.
+ N=1: default value.
N=2: bb's probabilities, detailed ready list info, unit/insn info.
N=3: rtl at abort point, control-flow, regions info.
N=5: dependences info. */
-
int sched_verbose = 0;
-/* Debugging file. All printouts are sent to dump, which is always set,
- either to stderr, or to the dump listing file (-dRS). */
+/* Debugging file. All printouts are sent to dump. */
FILE *sched_dump = 0;
/* This is a placeholder for the scheduler parameters common
to all schedulers. */
struct common_sched_info_def *common_sched_info;
#define INSN_TICK(INSN) (HID (INSN)->tick)
#define INSN_EXACT_TICK(INSN)
