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S/390: Improve documentation of s390_reload_costs. 

gcc/ChangeLog:

2016-04-29  Dominik Vogt  <vogt@linux.vnet.ibm.com>

	* config/s390/s390.c (s390_rtx_costs): Update documentation.

From-SVN: r235630
This commit is contained in:
Dominik Vogt 2016-04-29 09:20:55 +00:00 committed by Andreas Krebbel
parent 509063ebd1
commit 2c2156a714
2 changed files with 8 additions and 2 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2016-04-29 Dominik Vogt <vogt@linux.vnet.ibm.com>
* config/s390/s390.c (s390_rtx_costs): Update documentation.
2016-04-29 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* config/s390/2964.md ("z13_unit_fxu", "z13_0"): Remove lder.

6
gcc/config/s390/s390.c
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@ -3370,8 +3370,10 @@ s390_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED,
/* Compute a (partial) cost for rtx X. Return true if the complete
cost has been computed, and false if subexpressions should be
scanned. In either case, *TOTAL contains the cost result.
OUTER_CODE contains the code of the superexpression of x. */
scanned. In either case, *TOTAL contains the cost result. The
initial value of *TOTAL is the default value computed by
rtx_cost. It may be left unmodified. OUTER_CODE contains the
code of the superexpression of x. */
static bool
s390_rtx_costs (rtx x, machine_mode mode, int outer_code,