From 6ee2e1587ab08fb846788debf4778dec63dcec53 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Tue, 18 Apr 2006 08:23:39 +0000 Subject: [PATCH] re PR target/27117 (SH backend cheats to reload -- disables indexed addressing but uses it internally) 2006-04-18 Paolo Bonzini PR target/27117 Partial revert of revision 112637 2006-04-03 Paolo Bonzini Dale Johannesen PR target/19653 * regclass.c (struct reg_pref): Update documentation. (regclass): Set prefclass to NO_REGS if memory is the best option. (record_reg_classes): Cope with a prefclass set to NO_REGS. From-SVN: r113026 --- gcc/ChangeLog | 13 +++++++++++++ gcc/regclass.c | 14 ++++---------- 2 files changed, 17 insertions(+), 10 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2d26302bd4e..8574f89c36d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,16 @@ +2006-04-18 Paolo Bonzini + + PR target/27117 + + Partial revert of revision 112637 + 2006-04-03 Paolo Bonzini + Dale Johannesen + + PR target/19653 + * regclass.c (struct reg_pref): Update documentation. + (regclass): Set prefclass to NO_REGS if memory is the best option. + (record_reg_classes): Cope with a prefclass set to NO_REGS. + 2006-04-18 Paolo Bonzini PR tree-optimization/26821 diff --git a/gcc/regclass.c b/gcc/regclass.c index 8a0bab19026..7b2d5b1f3fb 100644 --- a/gcc/regclass.c +++ b/gcc/regclass.c @@ -811,8 +811,7 @@ struct costs /* Structure used to record preferences of given pseudo. */ struct reg_pref { - /* (enum reg_class) prefclass is the preferred class. May be - NO_REGS if no class is better than memory. */ + /* (enum reg_class) prefclass is the preferred class. */ char prefclass; /* altclass is a register class that we should use for allocating @@ -1315,10 +1314,6 @@ regclass (rtx f, int nregs) best = reg_class_subunion[(int) best][class]; } - /* If no register class is better than memory, use memory. */ - if (p->mem_cost < best_cost) - best = NO_REGS; - /* Record the alternate register class; i.e., a class for which every register in it is better than using memory. If adding a class would make a smaller class (i.e., no union of just those @@ -1529,7 +1524,7 @@ record_reg_classes (int n_alts, int n_ops, rtx *ops, to what we would add if this register were not in the appropriate class. */ - if (reg_pref && reg_pref[REGNO (op)].prefclass != NO_REGS) + if (reg_pref) alt_cost += (may_move_in_cost[mode] [(unsigned char) reg_pref[REGNO (op)].prefclass] @@ -1755,7 +1750,7 @@ record_reg_classes (int n_alts, int n_ops, rtx *ops, to what we would add if this register were not in the appropriate class. */ - if (reg_pref && reg_pref[REGNO (op)].prefclass != NO_REGS) + if (reg_pref) alt_cost += (may_move_in_cost[mode] [(unsigned char) reg_pref[REGNO (op)].prefclass] @@ -1841,8 +1836,7 @@ record_reg_classes (int n_alts, int n_ops, rtx *ops, int class; unsigned int nr; - if (regno >= FIRST_PSEUDO_REGISTER && reg_pref != 0 - && reg_pref[regno].prefclass != NO_REGS) + if (regno >= FIRST_PSEUDO_REGISTER && reg_pref != 0) { enum reg_class pref = reg_pref[regno].prefclass; -- 2.30.2