From e32e4c4a8826f872814b58deba660f6bb31e7b21 Mon Sep 17 00:00:00 2001 From: Vladimir Makarov Date: Fri, 28 Jun 2013 19:43:39 +0000 Subject: lra-constraints.c (need_for_split_p): Check call used hard regs living through calls. 2013-06-28 Vladimir Makarov * lra-constraints.c (need_for_split_p): Check call used hard regs living through calls. From-SVN: r200553 --- gcc/ChangeLog | 5 +++++ gcc/lra-constraints.c | 11 ++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) (limited to 'gcc') diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6c86c25..5aa5483 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2013-06-28 Vladimir Makarov + + * lra-constraints.c (need_for_split_p): Check call used hard regs + living through calls. + 2013-06-28 Michael Meissner PR target/57744 diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index 4ac20fd..f667512 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -4201,6 +4201,15 @@ need_for_split_p (HARD_REG_SET potential_reload_hard_regs, int regno) && (regno >= FIRST_PSEUDO_REGISTER || ! TEST_HARD_REG_BIT (eliminable_regset, hard_regno)) && ! TEST_HARD_REG_BIT (lra_no_alloc_regs, hard_regno) + /* Don't split call clobbered hard regs living through + calls, otherwise we might have a check problem in the + assign sub-pass as in the most cases (exception is a + situation when lra_risky_transformations_p value is + true) the assign pass assumes that all pseudos living + through calls are assigned to call saved hard regs. */ + && (regno >= FIRST_PSEUDO_REGISTER + || ! TEST_HARD_REG_BIT (call_used_reg_set, regno) + || usage_insns[regno].calls_num == calls_num) /* We need at least 2 reloads to make pseudo splitting profitable. We should provide hard regno splitting in any case to solve 1st insn scheduling problem when @@ -4799,7 +4808,7 @@ inherit_in_ebb (rtx head, rtx tail) usage_insns invalidation. */ if ((dst_regno < FIRST_PSEUDO_REGISTER || reg_renumber[dst_regno] >= 0) - && ! reg->subreg_p && reg->type != OP_IN) + && ! reg->subreg_p && reg->type != OP_IN) { HARD_REG_SET s; -- cgit v1.1