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| author | Alexander Monakov <amonakov@ispras.ru> | 2017-09-19 13:16:20 +0300 |
|---|---|---|
| committer | Alexander Monakov <amonakov@gcc.gnu.org> | 2017-09-19 13:16:20 +0300 |
| commit | ffaea1170332667a1533a354dfcedc6d0de4aa5e (patch) | |
| tree | 44bbb0fce59aadf8f4f5b18d02ac86d7dc1f856d /gcc/lra-assigns.c | |
| parent | 9412007cea62fe6181dfab389c578a0f0839baf8 (diff) | |
lra: make reload_pseudo_compare_func a proper comparator
PR rtl-optimization/57878
PR rtl-optimization/68988
* lra-assigns.c (reload_pseudo_compare_func): Remove fragmentation
avoidance test involving non_reload_pseudos. Move frequency test
below the general fragmentation avoidance test.
From-SVN: r252972
Diffstat (limited to 'gcc/lra-assigns.c')
| -rw-r--r-- | gcc/lra-assigns.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/gcc/lra-assigns.c b/gcc/lra-assigns.c index 9208fccfd59..5a65c7c8c5f 100644 --- a/gcc/lra-assigns.c +++ b/gcc/lra-assigns.c @@ -211,24 +211,15 @@ reload_pseudo_compare_func (const void *v1p, const void *v2p) if ((diff = (ira_class_hard_regs_num[cl1] - ira_class_hard_regs_num[cl2])) != 0) return diff; - if ((diff - = (ira_reg_class_max_nregs[cl2][lra_reg_info[r2].biggest_mode] - - ira_reg_class_max_nregs[cl1][lra_reg_info[r1].biggest_mode])) != 0 - /* The code below executes rarely as nregs == 1 in most cases. - So we should not worry about using faster data structures to - check reload pseudos. */ - && ! bitmap_bit_p (&non_reload_pseudos, r1) - && ! bitmap_bit_p (&non_reload_pseudos, r2)) - return diff; - if ((diff = (regno_assign_info[regno_assign_info[r2].first].freq - - regno_assign_info[regno_assign_info[r1].first].freq)) != 0) - return diff; /* Allocate bigger pseudos first to avoid register file fragmentation. */ if ((diff = (ira_reg_class_max_nregs[cl2][lra_reg_info[r2].biggest_mode] - ira_reg_class_max_nregs[cl1][lra_reg_info[r1].biggest_mode])) != 0) return diff; + if ((diff = (regno_assign_info[regno_assign_info[r2].first].freq + - regno_assign_info[regno_assign_info[r1].first].freq)) != 0) + return diff; /* Put pseudos from the thread nearby. */ if ((diff = regno_assign_info[r1].first - regno_assign_info[r2].first) != 0) return diff; |