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re PR go/66870 (split stack issues on ppc64le and ppc64)

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2015-08-15 Lynn Boger <laboger@linux.vnet.ibm.com>

	PR target/66870
	* gcc/config/rs6000/rs6000.c (rs6000_emit_prologue): Check
	for no_split_stack function attribute along with
	flag_split_stack.
	(rs6000_expand_split_stack_prologue): Likewise.

From-SVN: r226643
This commit is contained in:
Lynn Boger 2015-08-05 13:07:16 -05:00 committed by Lynn Boger
parent dc062b4986
commit f395ddf3c7
2 changed files with 20 additions and 4 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2015-08-05 Lynn Boger <laboger@linux.vnet.ibm.com>
PR target/66870
* gcc/config/rs6000/rs6000.c (rs6000_emit_prologue): Check
for no_split_stack function attribute along with
flag_split_stack.
(rs6000_expand_split_stack_prologue): Likewise.
2015-08-05 Manuel López-Ibáñez <manu@gcc.gnu.org>
Jeff Law <law@redhat.com>

16
gcc/config/rs6000/rs6000.c
View File

@ -23748,6 +23748,11 @@ rs6000_emit_prologue (void)
int using_static_chain_p = (cfun->static_chain_decl != NULL_TREE
&& df_regs_ever_live_p (STATIC_CHAIN_REGNUM)
&& call_used_regs[STATIC_CHAIN_REGNUM]);
int using_split_stack = (flag_split_stack
&& (lookup_attribute ("no_split_stack",
DECL_ATTRIBUTES (cfun->decl))
== NULL));
/* Offset to top of frame for frame_reg and sp respectively. */
HOST_WIDE_INT frame_off = 0;
HOST_WIDE_INT sp_off = 0;
@ -24018,7 +24023,7 @@ rs6000_emit_prologue (void)
&& info->cr_save_p
&& REGNO (frame_reg_rtx) != cr_save_regno
&& !(using_static_chain_p && cr_save_regno == 11)
&& !(flag_split_stack && cr_save_regno == 12 && sp_adjust))
&& !(using_split_stack && cr_save_regno == 12 && sp_adjust))
{
cr_save_rtx = gen_rtx_REG (SImode, cr_save_regno);
START_USE (cr_save_regno);
@ -24596,7 +24601,7 @@ rs6000_emit_prologue (void)
if ((DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_ELFv2)
&& !using_static_chain_p)
save_regno = 11;
else if (flag_split_stack || REGNO (frame_reg_rtx) == 12)
else if (using_split_stack || REGNO (frame_reg_rtx) == 12)
{
save_regno = 11;
if (using_static_chain_p)
@ -24699,7 +24704,7 @@ rs6000_emit_prologue (void)
emit_insn (gen_frame_store (reg, sp_reg_rtx, RS6000_TOC_SAVE_SLOT));
}
if (flag_split_stack && split_stack_arg_pointer_used_p ())
if (using_split_stack && split_stack_arg_pointer_used_p ())
{
/* Set up the arg pointer (r12) for -fsplit-stack code. If
__morestack was called, it left the arg pointer to the old
@ -26287,7 +26292,10 @@ rs6000_expand_split_stack_prologue (void)
static rtx
rs6000_internal_arg_pointer (void)
{
if (flag_split_stack)
if (flag_split_stack
&& (lookup_attribute ("no_split_stack", DECL_ATTRIBUTES (cfun->decl))
== NULL))
{
if (cfun->machine->split_stack_arg_pointer == NULL_RTX)
{