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s390.c (s390_emit_prologue): Do not set the frame_related flag for call-clobbered registers.

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* config/s390/s390.c (s390_emit_prologue): Do not set the
	frame_related flag for call-clobbered registers.

From-SVN: r49843
This commit is contained in:
Ulrich Weigand 2002-02-18 18:17:52 +00:00 committed by Ulrich Weigand
parent e95d6b23ae
commit 2c153108fd
2 changed files with 43 additions and 10 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-02-18 Ulrich Weigand <uweigand@de.ibm.com>
* config/s390/s390.c (s390_emit_prologue): Do not set the
frame_related flag for call-clobbered registers.
Mon Feb 18 15:07:35 CET 2002 Jan Hubicka <jh@suse.cz>
* i386.c (classify_argument): Properly classify SSE/MMX modes and VOIDmode.

48
gcc/config/s390/s390.c
View File

@ -2841,7 +2841,7 @@ s390_emit_prologue ()
struct s390_frame frame;
rtx insn, addr;
rtx temp_reg;
int i, limit;
int i;
/* Compute frame_info. */
@ -2871,24 +2871,52 @@ s390_emit_prologue ()
GEN_INT (frame.last_save_gpr
- frame.first_save_gpr + 1)));
/* Set RTX_FRAME_RELATED_P for all sets within store multiple. */
/* We need to set the FRAME_RELATED flag on all SETs
inside the store-multiple pattern.
limit = XVECLEN (PATTERN (insn), 0);
for (i = 0; i < limit; i++)
However, we must not emit DWARF records for registers 2..5
if they are stored for use by variable arguments ...
??? Unfortunately, it is not enough to simply not the the
FRAME_RELATED flags for those SETs, because the first SET
of the PARALLEL is always treated as if it had the flag
set, even if it does not. Therefore we emit a new pattern
without those registers as REG_FRAME_RELATED_EXPR note. */
if (frame.first_save_gpr >= 6)
{
rtx x = XVECEXP (PATTERN (insn), 0, i);
if (GET_CODE (x) == SET)
RTX_FRAME_RELATED_P (x) = 1;
rtx pat = PATTERN (insn);
for (i = 0; i < XVECLEN (pat, 0); i++)
if (GET_CODE (XVECEXP (pat, 0, i)) == SET)
RTX_FRAME_RELATED_P (XVECEXP (pat, 0, i)) = 1;
RTX_FRAME_RELATED_P (insn) = 1;
}
else if (frame.last_save_gpr >= 6)
{
rtx note, naddr;
naddr = plus_constant (stack_pointer_rtx, 6 * UNITS_PER_WORD);
note = gen_store_multiple (gen_rtx_MEM (Pmode, naddr),
gen_rtx_REG (Pmode, 6),
GEN_INT (frame.last_save_gpr - 6 + 1));
REG_NOTES (insn) =
gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR,
note, REG_NOTES (insn));
for (i = 0; i < XVECLEN (note, 0); i++)
if (GET_CODE (XVECEXP (note, 0, i)) == SET)
RTX_FRAME_RELATED_P (XVECEXP (note, 0, i)) = 1;
RTX_FRAME_RELATED_P (insn) = 1;
}
}
else
{
insn = emit_move_insn (addr,
gen_rtx_REG (Pmode, frame.first_save_gpr));
RTX_FRAME_RELATED_P (insn) = 1;
}
RTX_FRAME_RELATED_P (insn) = 1;
}
/* Dump constant pool and set constant pool register (13). */