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re PR rtl-optimization/72778 (internal compiler error: in create_pre_exit, at mode-switching.c:451) 

2016-08-03  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/72778
	* lra-spills.c (regno_in_use_p): Check bb and regno modification.
	Don't stop on regular insns.

From-SVN: r239091
This commit is contained in:
Vladimir Makarov 2016-08-03 18:54:49 +00:00 committed by Vladimir Makarov
parent 32eaac9c91
commit 73c77563c6
2 changed files with 34 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-08-03 Vladimir Makarov <vmakarov@redhat.com>
PR middle-end/72778
* lra-spills.c (regno_in_use_p): Check bb and regno modification.
Don't stop on regular insns.
2016-08-03 Nathan Sidwell <nathan@codesourcery.com>
* config/nvptx/nvptx.c (nvptx_declare_function_name): Round frame

32
gcc/lra-spills.c
View File

@ -686,16 +686,40 @@ return_regno_p (unsigned int regno)
return false;
}
/* Return true if REGNO is one of subsequent USE after INSN. */
/* Return true if REGNO is in one of subsequent USE after INSN in the
same BB. */
static bool
regno_in_use_p (rtx_insn *insn, unsigned int regno)
{
static lra_insn_recog_data_t id;
static struct lra_static_insn_data *static_id;
struct lra_insn_reg *reg;
int i, arg_regno;
basic_block bb = BLOCK_FOR_INSN (insn);
while ((insn = next_nondebug_insn (insn)) != NULL_RTX
&& INSN_P (insn) && GET_CODE (PATTERN (insn)) == USE)
&& bb == BLOCK_FOR_INSN (insn))
{
if (REG_P (XEXP (PATTERN (insn), 0))
if (! INSN_P (insn))
continue;
if (GET_CODE (PATTERN (insn)) == USE
&& REG_P (XEXP (PATTERN (insn), 0))
&& regno == REGNO (XEXP (PATTERN (insn), 0)))
return TRUE;
return true;
/* Check that the regno is not modified. */
id = lra_get_insn_recog_data (insn);
for (reg = id->regs; reg != NULL; reg = reg->next)
if (reg->type != OP_IN && reg->regno == (int) regno)
return false;
static_id = id->insn_static_data;
for (reg = static_id->hard_regs; reg != NULL; reg = reg->next)
if (reg->type != OP_IN && reg->regno == (int) regno)
return false;
if (id->arg_hard_regs != NULL)
for (i = 0; (arg_regno = id->arg_hard_regs[i]) >= 0; i++)
if ((int) regno == (arg_regno >= FIRST_PSEUDO_REGISTER
? arg_regno : arg_regno - FIRST_PSEUDO_REGISTER))
return false;
}
return false;
}