[PATCH] s390: Add -fsplit-stack support

[Marcin Kościelnicki]

On 15/02/16 11:21, Andreas Krebbel wrote:
> On 02/14/2016 05:01 PM, Marcin Kościelnicki wrote:
>> libgcc/ChangeLog:
>>
>> 	* config.host: Use t-stack and t-stack-s390 for s390*-*-linux.
>> 	* config/s390/morestack.S: New file.
>> 	* config/s390/t-stack-s390: New file.
>> 	* generic-morestack.c (__splitstack_find): Add s390-specific code.
>>
>> gcc/ChangeLog:
>>
>> 	* common/config/s390/s390-common.c (s390_supports_split_stack):
>> 	New function.
>> 	(TARGET_SUPPORTS_SPLIT_STACK): New macro.
>> 	* config/s390/s390-protos.h: Add s390_expand_split_stack_prologue.
>> 	* config/s390/s390.c (struct machine_function): New field
>> 	split_stack_varargs_pointer.
>> 	(s390_register_info): Mark r12 as clobbered if it'll be used as temp
>> 	in s390_emit_prologue.
>> 	(s390_emit_prologue): Use r12 as temp if r1 is taken by split-stack
>> 	vararg pointer.
>> 	(morestack_ref): New global.
>> 	(SPLIT_STACK_AVAILABLE): New macro.
>> 	(s390_expand_split_stack_prologue): New function.
>> 	(s390_live_on_entry): New function.
>> 	(s390_va_start): Use split-stack vararg pointer if appropriate.
>> 	(s390_asm_file_end): Emit the split-stack note sections.
>> 	(TARGET_EXTRA_LIVE_ON_ENTRY): New macro.
>> 	* config/s390/s390.md (UNSPEC_STACK_CHECK): New unspec.
>> 	(UNSPECV_SPLIT_STACK_CALL): New unspec.
>> 	(UNSPECV_SPLIT_STACK_DATA): New unspec.
>> 	(split_stack_prologue): New expand.
>> 	(split_stack_space_check): New expand.
>> 	(split_stack_data): New insn.
>> 	(split_stack_call): New expand.
>> 	(split_stack_call_*): New insn.
>> 	(split_stack_cond_call): New expand.
>> 	(split_stack_cond_call_*): New insn.
>
> Applied. Thanks!
>
> -Andreas-
>

Thanks.  And how about that testcase I submitted, does that look OK?

Marcin Kościelnicki