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re PR rtl-optimization/17428 (internal compiler error: in spill_failure, at reload1.c:1880 (-fspeculative-prefetching))

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PR target/17428
	* cfgrtl.c (safe_insert_insn_on_edge): Avoid extending life range of hard
	registers.
	* value-prof.c (insn_prefetch_values_to_profile): Only scan normal insns.

	* value-prof.c (rtl_find_values_to_profile): Do not look for values to
	profile in libcalls.

From-SVN: r95007
This commit is contained in:
Zdenek Dvorak 2005-02-14 12:37:52 +01:00 committed by Zdenek Dvorak
parent 09950393c3
commit af9ecd0ca0
3 changed files with 42 additions and 3 deletions
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10
gcc/ChangeLog
View File

@ -1,3 +1,13 @@
2005-02-13 Zdenek Dvorak <dvorakz@suse.cz>
PR target/17428
* cfgrtl.c (safe_insert_insn_on_edge): Avoid extending life range of hard
registers.
* value-prof.c (insn_prefetch_values_to_profile): Only scan normal insns.
* value-prof.c (rtl_find_values_to_profile): Do not look for values to
profile in libcalls.
2005-02-13 Nathan Sidwell <nathan@codesourcery.com>
* bitmap.h (bitmap_and_compl_into): Return bool.

11
gcc/cfgrtl.c
View File

@ -1470,6 +1470,16 @@ safe_insert_insn_on_edge (rtx insn, edge e)
for (x = insn; x; x = NEXT_INSN (x))
if (INSN_P (x))
note_stores (PATTERN (x), mark_killed_regs, killed);
/* Mark all hard registers as killed. Register allocator/reload cannot
cope with the situation when life range of hard register spans operation
for that the appropriate register is needed, i.e. it would be unsafe to
extend the life ranges of hard registers. */
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if (!fixed_regs[regno]
&& !REGNO_PTR_FRAME_P (regno))
SET_REGNO_REG_SET (killed, regno);
bitmap_and_into (killed, e->dest->global_live_at_start);
EXECUTE_IF_SET_IN_REG_SET (killed, 0, regno, rsi)
@ -1515,6 +1525,7 @@ safe_insert_insn_on_edge (rtx insn, edge e)
insert_insn_on_edge (insn, e);
FREE_REG_SET (killed);
return true;
}

24
gcc/value-prof.c
View File

@ -245,7 +245,8 @@ insn_prefetch_values_to_profile (rtx insn, histogram_values *values)
int write;
histogram_value hist;
if (!INSN_P (insn))
/* It only makes sense to look for memory references in ordinary insns. */
if (GET_CODE (insn) != INSN)
return false;
if (!find_mem_reference (insn, &mem, &write))
@ -288,13 +289,30 @@ static void
rtl_find_values_to_profile (histogram_values *values)
{
rtx insn;
unsigned i;
unsigned i, libcall_level;
life_analysis (NULL, PROP_DEATH_NOTES);
*values = VEC_alloc (histogram_value, 0);
libcall_level = 0;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
insn_values_to_profile (insn, values);
{
if (find_reg_note (insn, REG_LIBCALL, NULL_RTX))
libcall_level++;
/* Do not instrument values inside libcalls (we are going to split block
due to instrumentation, and libcall blocks should be local to a single
basic block). */
if (!libcall_level)
insn_values_to_profile (insn, values);
if (find_reg_note (insn, REG_RETVAL, NULL_RTX))
{
gcc_assert (libcall_level > 0);
libcall_level--;
}
}
gcc_assert (libcall_level == 0);
for (i = 0; i < VEC_length (histogram_value, *values); i++)
{