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Calculate prediction remainder at proper place (PR tree-optimization/88650). 

2019-01-02  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/88650
	* predict.c (set_even_probabilities): Calculate probability
	remainer only when really used.
2019-01-02  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/88650
	* gfortran.dg/predict-3.f90: New test.

From-SVN: r267513
This commit is contained in:
Martin Liska 2019-01-02 15:03:53 +01:00 committed by Martin Liska
parent 17067056c1
commit 0588e28824
4 changed files with 48 additions and 7 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2019-01-02 Martin Liska <mliska@suse.cz>
PR tree-optimization/88650
* predict.c (set_even_probabilities): Calculate probability
remainer only when really used.
2019-01-02 Richard Biener <rguenther@suse.de>
PR middle-end/88651

16
gcc/predict.c
View File

@ -877,19 +877,21 @@ set_even_probabilities (basic_block bb,
int p = prediction->ep_probability;
profile_probability prob
= profile_probability::from_reg_br_prob_base (p);
profile_probability remainder = prob.invert ();
remainder -= profile_probability::very_unlikely ()
.apply_scale (unlikely_count, 1);
int count = nedges - unlikely_count - 1;
gcc_assert (count >= 0);
profile_probability even = remainder.apply_scale (1, count);
if (prediction->ep_edge == e)
e->probability = prob;
else if (unlikely_edges != NULL && unlikely_edges->contains (e))
e->probability = profile_probability::very_unlikely ();
else
e->probability = even;
{
profile_probability remainder = prob.invert ();
remainder -= profile_probability::very_unlikely ()
.apply_scale (unlikely_count, 1);
int count = nedges - unlikely_count - 1;
gcc_assert (count >= 0);
e->probability = remainder.apply_scale (1, count);
}
}
else
e->probability = profile_probability::never ();

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2019-01-02 Martin Liska <mliska@suse.cz>
PR tree-optimization/88650
* gfortran.dg/predict-3.f90: New test.
2019-01-02 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* g++.dg/gcov/pr88263.C: Rename namespace log to logging.

28
gcc/testsuite/gfortran.dg/predict-3.f90 Normal file
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@ -0,0 +1,28 @@
! { dg-do compile }
! { dg-options "-fno-tree-fre -fno-tree-ccp -Og" }
program simplify_transfer
call pr30881 ()
contains
subroutine pr18769 ()
type t
end type t
end subroutine pr18769
subroutine pr30881 ()
INTEGER, PARAMETER :: K=1
I=TRANSFER(.TRUE.,K)
SELECT CASE(I)
CASE(TRANSFER(.TRUE.,K))
CASE(TRANSFER(.FALSE.,K))
STOP 2
CASE DEFAULT
STOP 3
END SELECT
END subroutine pr30881
subroutine pr31194 ()
end subroutine pr31194
subroutine pr31216 ()
END subroutine pr31216
subroutine pr31427 ()
END subroutine pr31427
end program simplify_transfer