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| author | Alexey Starovoytov <alexey.starovoytov@sun.com> | 2006-04-14 07:01:38 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2006-04-14 07:01:38 +0000 |
| commit | 68ba34f361d5287404bde9283b9df315f4a2c147 (patch) | |
| tree | 43f4e85b1d6157f26fa20af215d3f50757377754 | |
| parent | 39b1ec97f0445bcc6e960de32e7b82011f0161ca (diff) | |
| download | gcc-68ba34f361d5287404bde9283b9df315f4a2c147.zip gcc-68ba34f361d5287404bde9283b9df315f4a2c147.tar.gz gcc-68ba34f361d5287404bde9283b9df315f4a2c147.tar.bz2 | |
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
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/sparc/sparc.c | 20 |
2 files changed, 20 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f8fdd81..d063df8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c index 578f916..692e46e 100644 --- a/gcc/config/sparc/sparc.c +++ b/gcc/config/sparc/sparc.c @@ -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 |