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re PR rtl-optimization/17933 (ICE: in schedule_insns, at /sched-rgn.c:2555) 

PR rtl-optimization/17933
	* rtlanal.c (dead_or_set_regno_p): Break out common code to...
	(covers_regno_p): New function.  Handle SETs of PARALLEL,
	and defer the rest to...
	(covers_regno_no_parallel_p): New function.

From-SVN: r90183
This commit is contained in:
Hans-Peter Nilsson 2004-11-06 18:33:04 +00:00 committed by Hans-Peter Nilsson
parent 629bf5f9a4
commit 194acded39
2 changed files with 66 additions and 44 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2004-11-06 Hans-Peter Nilsson <hp@bitrange.com>
PR rtl-optimization/17933
* rtlanal.c (dead_or_set_regno_p): Break out common code to...
(covers_regno_p): New function. Handle SETs of PARALLEL,
and defer the rest to...
(covers_regno_no_parallel_p): New function.
2004-11-06 Eric Botcazou <ebotcazou@libertysurf.fr>
* config/sparc/sparc.c (function_arg_record_value_1): Skip

102
gcc/rtlanal.c
View File

@ -41,6 +41,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
/* Forward declarations */
static int global_reg_mentioned_p_1 (rtx *, void *);
static void set_of_1 (rtx, rtx, void *);
static bool covers_regno_p (rtx, unsigned int);
static bool covers_regno_no_parallel_p (rtx, unsigned int);
static int rtx_referenced_p_1 (rtx *, void *);
static int computed_jump_p_1 (rtx);
static void parms_set (rtx, rtx, void *);
@ -1549,13 +1551,64 @@ dead_or_set_p (rtx insn, rtx x)
return 1;
}
/* Return TRUE iff DEST is a register or subreg of a register and
doesn't change the number of words of the inner register, and any
part of the register is TEST_REGNO. */
static bool
covers_regno_no_parallel_p (rtx dest, unsigned int test_regno)
{
unsigned int regno, endregno;
if (GET_CODE (dest) == SUBREG
&& (((GET_MODE_SIZE (GET_MODE (dest))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)
== ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)))
dest = SUBREG_REG (dest);
if (!REG_P (dest))
return false;
regno = REGNO (dest);
endregno = (regno >= FIRST_PSEUDO_REGISTER ? regno + 1
: regno + hard_regno_nregs[regno][GET_MODE (dest)]);
return (test_regno >= regno && test_regno < endregno);
}
/* Like covers_regno_no_parallel_p, but also handles PARALLELs where
any member matches the covers_regno_no_parallel_p criteria. */
static bool
covers_regno_p (rtx dest, unsigned int test_regno)
{
if (GET_CODE (dest) == PARALLEL)
{
/* Some targets place small structures in registers for return
values of functions, and those registers are wrapped in
PARALLELs that we may see as the destination of a SET. */
int i;
for (i = XVECLEN (dest, 0) - 1; i >= 0; i--)
{
rtx inner = XEXP (XVECEXP (dest, 0, i), 0);
if (inner != NULL_RTX
&& covers_regno_no_parallel_p (inner, test_regno))
return true;
}
return false;
}
else
return covers_regno_no_parallel_p (dest, test_regno);
}
/* Utility function for dead_or_set_p to check an individual register. Also
called from flow.c. */
int
dead_or_set_regno_p (rtx insn, unsigned int test_regno)
{
unsigned int regno, endregno;
rtx pattern;
/* See if there is a death note for something that includes TEST_REGNO. */
@ -1572,28 +1625,7 @@ dead_or_set_regno_p (rtx insn, unsigned int test_regno)
pattern = COND_EXEC_CODE (pattern);
if (GET_CODE (pattern) == SET)
{
rtx dest = SET_DEST (pattern);
/* A value is totally replaced if it is the destination or the
destination is a SUBREG of REGNO that does not change the number of
words in it. */
if (GET_CODE (dest) == SUBREG
&& (((GET_MODE_SIZE (GET_MODE (dest))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)
== ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)))
dest = SUBREG_REG (dest);
if (!REG_P (dest))
return 0;
regno = REGNO (dest);
endregno = (regno >= FIRST_PSEUDO_REGISTER ? regno + 1
: regno + hard_regno_nregs[regno][GET_MODE (dest)]);
return (test_regno >= regno && test_regno < endregno);
}
return covers_regno_p (SET_DEST (pattern), test_regno);
else if (GET_CODE (pattern) == PARALLEL)
{
int i;
@ -1605,27 +1637,9 @@ dead_or_set_regno_p (rtx insn, unsigned int test_regno)
if (GET_CODE (body) == COND_EXEC)
body = COND_EXEC_CODE (body);
if (GET_CODE (body) == SET || GET_CODE (body) == CLOBBER)
{
rtx dest = SET_DEST (body);
if (GET_CODE (dest) == SUBREG
&& (((GET_MODE_SIZE (GET_MODE (dest))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)
== ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)))
dest = SUBREG_REG (dest);
if (!REG_P (dest))
continue;
regno = REGNO (dest);
endregno = (regno >= FIRST_PSEUDO_REGISTER ? regno + 1
: regno + hard_regno_nregs[regno][GET_MODE (dest)]);
if (test_regno >= regno && test_regno < endregno)
return 1;
}
if ((GET_CODE (body) == SET || GET_CODE (body) == CLOBBER)
&& covers_regno_p (SET_DEST (body), test_regno))
return 1;
}
}