sparc.c (emit_and_preserve): Allocate space for the register save area.

* config/sparc/sparc.c (emit_and_preserve): Allocate space for the
	register save area.


Co-Authored-By: Eric Botcazou <ebotcazou@libertysurf.fr>

From-SVN: r112950
This commit is contained in:
Alexey Starovoytov 2006-04-14 07:01:38 +00:00 committed by Eric Botcazou
parent 39b1ec97f0
commit 68ba34f361
2 changed files with 20 additions and 6 deletions

View File

@ -1,3 +1,9 @@
2006-04-14 Alexey Starovoytov <alexey.starovoytov@sun.com>
Eric Botcazou <ebotcazou@libertysurf.fr>
* config/sparc/sparc.c (emit_and_preserve): Allocate space for the
register save area.
2005-04-13 Uros Bizjak <uros@kss-loka.si>
PR middle-end/27134

View File

@ -8487,16 +8487,24 @@ sparc_rtx_costs (rtx x, int code, int outer_code, int *total)
}
}
/* Emit the sequence of insns SEQ while preserving the registers. */
/* Emit the sequence of insns SEQ while preserving the registers REG and REG2.
This is achieved by means of a manual dynamic stack space allocation in
the current frame. We make the assumption that SEQ doesn't contain any
function calls, with the possible exception of calls to the PIC helper. */
static void
emit_and_preserve (rtx seq, rtx reg, rtx reg2)
{
/* STACK_BOUNDARY guarantees that this is a 2-word slot. */
rtx slot = gen_rtx_MEM (word_mode,
plus_constant (stack_pointer_rtx, SPARC_STACK_BIAS));
/* We must preserve the lowest 16 words for the register save area. */
HOST_WIDE_INT offset = 16*UNITS_PER_WORD;
/* We really need only 2 words of fresh stack space. */
HOST_WIDE_INT size = SPARC_STACK_ALIGN (offset + 2*UNITS_PER_WORD);
emit_insn (gen_stack_pointer_dec (GEN_INT (STACK_BOUNDARY/BITS_PER_UNIT)));
rtx slot
= gen_rtx_MEM (word_mode, plus_constant (stack_pointer_rtx,
SPARC_STACK_BIAS + offset));
emit_insn (gen_stack_pointer_dec (GEN_INT (size)));
emit_insn (gen_rtx_SET (VOIDmode, slot, reg));
if (reg2)
emit_insn (gen_rtx_SET (VOIDmode,
@ -8508,7 +8516,7 @@ emit_and_preserve (rtx seq, rtx reg, rtx reg2)
reg2,
adjust_address (slot, word_mode, UNITS_PER_WORD)));
emit_insn (gen_rtx_SET (VOIDmode, reg, slot));
emit_insn (gen_stack_pointer_inc (GEN_INT (STACK_BOUNDARY/BITS_PER_UNIT)));
emit_insn (gen_stack_pointer_inc (GEN_INT (size)));
}
/* Output the assembler code for a thunk function. THUNK_DECL is the