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re PR target/31701 (SH: wrong epilogue for sibling calls)

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PR target/31701
	* config/sh/sh.c (output_stack_adjust): Avoid using the frame
	register itself to hold the offset constant.  Tell flow the use
	of r4 and r5 when they are used.

From-SVN: r124248
This commit is contained in:
Kaz Kojima 2007-04-28 00:07:40 +00:00
parent 805ea2f32d
commit eb996a4ac9
2 changed files with 17 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2007-04-27 Kaz Kojima <kkojima@gcc.gnu.org>
PR target/31701
* config/sh/sh.c (output_stack_adjust): Avoid using the frame
register itself to hold the offset constant. Tell flow the use
of r4 and r5 when they are used.
2007-04-27 Richard Guenther <rguenther@suse.de> 2007-04-27 Richard Guenther <rguenther@suse.de>
* tree-ssa-forwprop.c (forward_propagate_into_cond): Keep track * tree-ssa-forwprop.c (forward_propagate_into_cond): Keep track

11
gcc/config/sh/sh.c
View File

@ -5619,7 +5619,13 @@ output_stack_adjust (int size, rtx reg, int epilogue_p,
temp = scavenge_reg (&temps); temp = scavenge_reg (&temps);
} }
if (temp < 0 && live_regs_mask) if (temp < 0 && live_regs_mask)
temp = scavenge_reg (live_regs_mask); {
HARD_REG_SET temps;
COPY_HARD_REG_SET (temps, *live_regs_mask);
CLEAR_HARD_REG_BIT (temps, REGNO (reg));
temp = scavenge_reg (&temps);
}
if (temp < 0) if (temp < 0)
{ {
rtx adj_reg, tmp_reg, mem; rtx adj_reg, tmp_reg, mem;
@ -5668,6 +5674,9 @@ output_stack_adjust (int size, rtx reg, int epilogue_p,
emit_move_insn (adj_reg, mem); emit_move_insn (adj_reg, mem);
mem = gen_tmp_stack_mem (Pmode, gen_rtx_POST_INC (Pmode, reg)); mem = gen_tmp_stack_mem (Pmode, gen_rtx_POST_INC (Pmode, reg));
emit_move_insn (tmp_reg, mem); emit_move_insn (tmp_reg, mem);
/* Tell flow the insns that pop r4/r5 aren't dead. */
emit_insn (gen_rtx_USE (VOIDmode, tmp_reg));
emit_insn (gen_rtx_USE (VOIDmode, adj_reg));
return; return;
} }
const_reg = gen_rtx_REG (GET_MODE (reg), temp); const_reg = gen_rtx_REG (GET_MODE (reg), temp);