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(output_return_instruction): Do not writeback the stack pointer when it is being loaded.

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(output_return_instruction): Do not writeback the stack pointer when it is
being loaded.  (arm_output_epilogue): Likewise.

From-SVN: r57256
This commit is contained in:
Nick Clifton 2002-09-17 19:29:12 +00:00 committed by Nick Clifton
parent 24491a0950
commit f1acdf8b0f
2 changed files with 18 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2002-09-17 Nick Clifton <nickc@redhat.com>
* config/arm/arm.c (output_return_instruction): Do not
writeback the stack pointer when it is being loaded.
(arm_output_epilogue): Likewise.
2002-09-17 Kazu Hirata <kazu@cs.umass.edu>
* optabs.c (prepare_cmp_insn): Let emit_library_call_value

13
gcc/config/arm/arm.c
View File

@ -7325,6 +7325,8 @@ output_return_instruction (operand, really_return, reverse)
/* Generate the load multiple instruction to restore the registers. */
if (frame_pointer_needed)
sprintf (instr, "ldm%sea\t%%|fp, {", conditional);
else if (live_regs_mask & (1 << SP_REGNUM))
sprintf (instr, "ldm%sfd\t%%|sp, {", conditional);
else
sprintf (instr, "ldm%sfd\t%%|sp!, {", conditional);
@ -7736,7 +7738,16 @@ arm_output_epilogue (really_return)
asm_fprintf (f, "\tldr\t%r, [%r], #4\n", LR_REGNUM, SP_REGNUM);
}
else if (saved_regs_mask)
print_multi_reg (f, "ldmfd\t%r!", SP_REGNUM, saved_regs_mask);
{
if (saved_regs_mask & (1 << SP_REGNUM))
/* Note - write back to the stack register is not enabled
(ie "ldmfd sp!..."). We know that the stack pointer is
in the list of registers and if we add writeback the
instruction becomes UNPREDICTABLE. */
print_multi_reg (f, "ldmfd\t%r", SP_REGNUM, saved_regs_mask);
else
print_multi_reg (f, "ldmfd\t%r!", SP_REGNUM, saved_regs_mask);
}
if (current_function_pretend_args_size)
{