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| author | Andreas Krebbel <Andreas.Krebbel@de.ibm.com> | 2013-05-15 08:57:19 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2013-05-15 08:57:19 +0000 |
| commit | 1dd03b91ccae183b0b313cc0a54953dfc621951a (patch) | |
| tree | 9e58bebadb6ecee6dc1e3128e5fe17b234d7195b /gcc | |
| parent | 3b2453a973c7607e64ded18d757c7a4680c07bc2 (diff) | |
| download | gcc-1dd03b91ccae183b0b313cc0a54953dfc621951a.zip gcc-1dd03b91ccae183b0b313cc0a54953dfc621951a.tar.gz gcc-1dd03b91ccae183b0b313cc0a54953dfc621951a.tar.bz2 | |
s390.c (s390_register_move_cost): Don't impose the FPR<->GPR move cost penalty if ldgr/lgdr can be used.
2013-05-15 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* config/s390/s390.c (s390_register_move_cost): Don't impose the
FPR<->GPR move cost penalty if ldgr/lgdr can be used.
From-SVN: r198923
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/s390/s390.c | 12 |
2 files changed, 12 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index aa1f910..3409780 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2013-05-15 Andreas Krebbel <Andreas.Krebbel@de.ibm.com> + + * config/s390/s390.c (s390_register_move_cost): Don't impose the + FPR<->GPR move cost penalty if ldgr/lgdr can be used. + 2013-05-15 Richard Biener <rguenther@suse.de> PR tree-optimization/57275 diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index 1578363..30c3490 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -2432,11 +2432,13 @@ static int s390_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, reg_class_t from, reg_class_t to) { -/* On s390, copy between fprs and gprs is expensive. */ - if ((reg_classes_intersect_p (from, GENERAL_REGS) - && reg_classes_intersect_p (to, FP_REGS)) - || (reg_classes_intersect_p (from, FP_REGS) - && reg_classes_intersect_p (to, GENERAL_REGS))) + /* On s390, copy between fprs and gprs is expensive as long as no + ldgr/lgdr can be used. */ + if ((!TARGET_Z10 || GET_MODE_SIZE (mode) != 8) + && ((reg_classes_intersect_p (from, GENERAL_REGS) + && reg_classes_intersect_p (to, FP_REGS)) + || (reg_classes_intersect_p (from, FP_REGS) + && reg_classes_intersect_p (to, GENERAL_REGS)))) return 10; return 1; |