2013-07-27 Joern Rennecke <joern.renne...@embecosm.com>
* config/epiphany/epiphany.c (epiphany_compute_frame_size):
Also reserve space for saving UNKNOWN_REGNUM for leaf functions.
Index: config/epiphany/epiphany.c
===================================================================
--- config/epiphany/epiphany.c (revision 201267)
+++ config/epiphany/epiphany.c (working copy)
@@ -884,6 +884,11 @@ struct epiphany_frame_info
int stld_sz; /* Current load/store data size for offset
adjustment. */
int need_fp; /* value to override "frame_pointer_needed */
+ /* FIRST_SLOT is the slot that is saved first, at the very start of
+ the frame, with a POST_MODIFY to allocate the frame, if the size fits,
+ or at least the parm and register save areas, otherwise.
+ In the case of a large frame, LAST_SLOT is the slot that is saved last,
+ with a POST_MODIFY to allocate the rest of the frame. */
int first_slot, last_slot, first_slot_offset, last_slot_offset;
int first_slot_size;
int small_threshold;
@@ -1069,7 +1074,10 @@ epiphany_compute_frame_size (int size /*
to be a lot of code complexity for little gain. */
|| (reg_size > 8 && optimize))
reg_size = EPIPHANY_STACK_ALIGN (reg_size);
- if (total_size + reg_size <= (unsigned) epiphany_stack_offset
+ if (((total_size + reg_size
+ /* Reserve space for UNKNOWN_REGNUM. */
+ + EPIPHANY_STACK_ALIGN (4))
+ <= (unsigned) epiphany_stack_offset)
&& !interrupt_p
&& crtl->is_leaf && !frame_pointer_needed)
{
@@ -1108,7 +1116,7 @@ epiphany_compute_frame_size (int size /*
if (total_size + reg_size <= (unsigned) epiphany_stack_offset)
{
gcc_assert (first_slot < 0);
- gcc_assert (reg_size == 0);
+ gcc_assert (reg_size == 0 || reg_size == epiphany_stack_offset);
last_slot_offset = EPIPHANY_STACK_ALIGN (total_size + reg_size);
}
else
