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re PR debug/65779 (undefined local symbol on powerpc [regression])

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PR debug/65779
	* shrink-wrap.c: Include valtrack.h.
	(move_insn_for_shrink_wrap): Add DEBUG argument.  If
	MAY_HAVE_DEBUG_INSNS, call dead_debug_add on DEBUG_INSNs
	in between insn and where it will be moved to.  Call
	dead_debug_insert_temp.
	(prepare_shrink_wrap): Adjust caller.  Call dead_debug_local_init
	first and dead_debug_local_finish at the end.
	For uses and defs bitmap, handle all regs in between REGNO and
	END_REGNO, not just the first one.

	* gcc.dg/pr65779.c: New test.

From-SVN: r232558
This commit is contained in:
Jakub Jelinek 2016-01-19 14:21:04 +01:00 committed by Jakub Jelinek
parent e2c768b644
commit 015337d35b
4 changed files with 96 additions and 4 deletions
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13
gcc/ChangeLog
View File

@ -1,3 +1,16 @@
2016-01-19 Jakub Jelinek <jakub@redhat.com>
PR debug/65779
* shrink-wrap.c: Include valtrack.h.
(move_insn_for_shrink_wrap): Add DEBUG argument. If
MAY_HAVE_DEBUG_INSNS, call dead_debug_add on DEBUG_INSNs
in between insn and where it will be moved to. Call
dead_debug_insert_temp.
(prepare_shrink_wrap): Adjust caller. Call dead_debug_local_init
first and dead_debug_local_finish at the end.
For uses and defs bitmap, handle all regs in between REGNO and
END_REGNO, not just the first one.
2016-01-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/69352

40
gcc/shrink-wrap.c
View File

@ -39,6 +39,7 @@ along with GCC; see the file COPYING3. If not see
#include "shrink-wrap.h"
#include "regcprop.h"
#include "rtl-iter.h"
#include "valtrack.h"
/* Return true if INSN requires the stack frame to be set up.
@ -149,7 +150,8 @@ static bool
move_insn_for_shrink_wrap (basic_block bb, rtx_insn *insn,
const HARD_REG_SET uses,
const HARD_REG_SET defs,
bool *split_p)
bool *split_p,
struct dead_debug_local *debug)
{
rtx set, src, dest;
bitmap live_out, live_in, bb_uses, bb_defs;
@ -158,6 +160,8 @@ move_insn_for_shrink_wrap (basic_block bb, rtx_insn *insn,
unsigned int end_sregno = FIRST_PSEUDO_REGISTER;
basic_block next_block;
edge live_edge;
rtx_insn *dinsn;
df_ref def;
/* Look for a simple register assignment. We don't use single_set here
because we can't deal with any CLOBBERs, USEs, or REG_UNUSED secondary
@ -302,6 +306,20 @@ move_insn_for_shrink_wrap (basic_block bb, rtx_insn *insn,
move it as far as we can. */
do
{
if (MAY_HAVE_DEBUG_INSNS)
{
FOR_BB_INSNS_REVERSE (bb, dinsn)
if (DEBUG_INSN_P (dinsn))
{
df_ref use;
FOR_EACH_INSN_USE (use, dinsn)
if (refers_to_regno_p (dregno, end_dregno,
DF_REF_REG (use), (rtx *) NULL))
dead_debug_add (debug, use, DF_REF_REGNO (use));
}
else if (dinsn == insn)
break;
}
live_out = df_get_live_out (bb);
live_in = df_get_live_in (next_block);
bb = next_block;
@ -384,6 +402,12 @@ move_insn_for_shrink_wrap (basic_block bb, rtx_insn *insn,
SET_REGNO_REG_SET (bb_uses, i);
}
/* Insert debug temps for dead REGs used in subsequent debug insns. */
if (debug->used && !bitmap_empty_p (debug->used))
FOR_EACH_INSN_DEF (def, insn)
dead_debug_insert_temp (debug, DF_REF_REGNO (def), insn,
DEBUG_TEMP_BEFORE_WITH_VALUE);
emit_insn_after (PATTERN (insn), bb_note (bb));
delete_insn (insn);
return true;
@ -404,6 +428,8 @@ prepare_shrink_wrap (basic_block entry_block)
HARD_REG_SET uses, defs;
df_ref def, use;
bool split_p = false;
unsigned int i;
struct dead_debug_local debug;
if (JUMP_P (BB_END (entry_block)))
{
@ -414,19 +440,22 @@ prepare_shrink_wrap (basic_block entry_block)
copyprop_hardreg_forward_bb_without_debug_insn (entry_block);
}
dead_debug_local_init (&debug, NULL, NULL);
CLEAR_HARD_REG_SET (uses);
CLEAR_HARD_REG_SET (defs);
FOR_BB_INSNS_REVERSE_SAFE (entry_block, insn, curr)
if (NONDEBUG_INSN_P (insn)
&& !move_insn_for_shrink_wrap (entry_block, insn, uses, defs,
&split_p))
&split_p, &debug))
{
/* Add all defined registers to DEFs. */
FOR_EACH_INSN_DEF (def, insn)
{
x = DF_REF_REG (def);
if (REG_P (x) && HARD_REGISTER_P (x))
SET_HARD_REG_BIT (defs, REGNO (x));
for (i = REGNO (x); i < END_REGNO (x); i++)
SET_HARD_REG_BIT (defs, i);
}
/* Add all used registers to USESs. */
@ -434,9 +463,12 @@ prepare_shrink_wrap (basic_block entry_block)
{
x = DF_REF_REG (use);
if (REG_P (x) && HARD_REGISTER_P (x))
SET_HARD_REG_BIT (uses, REGNO (x));
for (i = REGNO (x); i < END_REGNO (x); i++)
SET_HARD_REG_BIT (uses, i);
}
}
dead_debug_local_finish (&debug, NULL);
}
/* Return whether basic block PRO can get the prologue. It can not if it

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-01-19 Jakub Jelinek <jakub@redhat.com>
PR debug/65779
* gcc.dg/pr65779.c: New test.
2016-01-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/69352

42
gcc/testsuite/gcc.dg/pr65779.c Normal file
View File

@ -0,0 +1,42 @@
/* PR debug/65779 */
/* { dg-do assemble } */
/* { dg-options "-O2 -fcompare-debug" } */
unsigned long
foo (unsigned long x, unsigned char *y, unsigned int z)
{
unsigned long a = x & 0xffff;
unsigned long b = (x >> 16) & 0xffff;
int k;
if (y == 0) return 1L;
while (z > 0)
{
k = z < 5552 ? z : 5552;
z -= k;
while (k >= 16)
{
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
a += *y++; b += a;
k -= 16;
}
if (k != 0)
do { a += *y++; b += a; } while (--k);
a %= 65521L;
b %= 65521L;
}
return (b << 16) | a;
}