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mode-switching.c (create_pre_exit): Rename maybe_builtin_apply to multi_reg_return. 

* mode-switching.c (create_pre_exit): Rename maybe_builtin_apply
	to multi_reg_return.  Clarify that we are skipping USEs of multiple
	return registers.  Use bool type where appropriate.

From-SVN: r203856
This commit is contained in:
Uros Bizjak 2013-10-19 14:32:25 +02:00
parent 41ee845b75
commit c07757e536
2 changed files with 25 additions and 16 deletions
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16
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2013-10-19 Uros Bizjak <ubizjak@gmail.com>
* mode-switching.c (create_pre_exit): Rename maybe_builtin_apply
to multi_reg_return. Clarify that we are skipping USEs of multiple
return registers. Use bool type where appropriate.
2013-10-18 Jan Hubicka <jh@suse.cz>
* config/i386/i386.h (ACCUMULATE_OUTGOING_ARGS): Disable accumulation
@ -6,7 +12,8 @@
(X86_TUNE_PUSH_MEMORY): Likewise.
(X86_TUNE_AVX256_UNALIGNED_LOAD_OPTIMAL,
X86_TUNE_AVX256_UNALIGNED_STORE_OPTIMAL): New.
(X86_TUNE_ACCUMULATE_OUTGOING_ARGS, X86_TUNE_ALWAYS_FANCY_MATH_387): New.
(X86_TUNE_ACCUMULATE_OUTGOING_ARGS, X86_TUNE_ALWAYS_FANCY_MATH_387):
New.
* i386.c (x86_accumulate_outgoing_args, x86_arch_always_fancy_math_387,
x86_avx256_split_unaligned_load, x86_avx256_split_unaligned_store):
Remove.
@ -21,8 +28,8 @@
2013-10-18 Andrew MacLeod <amacleod@redhat.com>
* tree-ssa.h: Don't include gimple-low.h, tree-ssa-address.h, sbitmap.h,
tree-ssa-threadedge.h, tree-ssa-dom.h, and tree-cfgcleanup.h.
* tree-ssa.h: Don't include gimple-low.h, tree-ssa-address.h,
sbitmap.h, tree-ssa-threadedge.h, tree-ssa-dom.h and tree-cfgcleanup.h.
* gimple-low.c (gimple_check_call_arg,
gimple_check_call_matching_types): Move to cgraph.c.
* gimple-low.h: Remove prototype.
@ -90,7 +97,8 @@
* tree-ssa-threadupdate.c: Do not include "tm.h" or "tm_p.h".
* tree-ssa-threadupdate.c: Include "dbgcnt.h".
(register_jump_thread): Add "registered_jump_thread" debug counter support.
(register_jump_thread): Add "registered_jump_thread" debug
counter support.
* dbgcnt.def (registered_jump_thread): New debug counter.
2013-10-18 Andrew MacLeod <amacleod@redhat.com>

25
gcc/mode-switching.c
View File

@ -229,9 +229,9 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
int ret_start = REGNO (ret_reg);
int nregs = hard_regno_nregs[ret_start][GET_MODE (ret_reg)];
int ret_end = ret_start + nregs;
int short_block = 0;
int maybe_builtin_apply = 0;
int forced_late_switch = 0;
bool short_block = false;
bool multi_reg_return = false;
bool forced_late_switch = false;
rtx before_return_copy;
do
@ -251,19 +251,20 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
copy yet, the copy must have been deleted. */
if (CALL_P (return_copy))
{
short_block = 1;
short_block = true;
break;
}
return_copy_pat = PATTERN (return_copy);
switch (GET_CODE (return_copy_pat))
{
case USE:
/* Skip __builtin_apply pattern. */
/* Skip USEs of multiple return registers.
__builtin_apply pattern is also handled here. */
if (GET_CODE (XEXP (return_copy_pat, 0)) == REG
&& (targetm.calls.function_value_regno_p
(REGNO (XEXP (return_copy_pat, 0)))))
{
maybe_builtin_apply = 1;
multi_reg_return = true;
last_insn = return_copy;
continue;
}
@ -326,7 +327,7 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
there are no return copy insns at all. This
avoids an ice on that invalid function. */
if (ret_start + nregs == ret_end)
short_block = 1;
short_block = true;
break;
}
if (!targetm.calls.function_value_regno_p (copy_start))
@ -354,10 +355,10 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
another mode than MODE_EXIT, even if it is
unrelated to the return value, so we want to put
the final mode switch after it. */
if (maybe_builtin_apply
if (multi_reg_return
&& targetm.calls.function_value_regno_p
(copy_start))
forced_late_switch = 1;
forced_late_switch = true;
/* For the SH4, floating point loads depend on fpscr,
thus we might need to put the final mode switch
@ -367,7 +368,7 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
if (copy_start >= ret_start
&& copy_start + copy_num <= ret_end
&& OBJECT_P (SET_SRC (return_copy_pat)))
forced_late_switch = 1;
forced_late_switch = true;
break;
}
if (copy_num == 0)
@ -379,7 +380,7 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
if (copy_start >= ret_start
&& copy_start + copy_num <= ret_end)
nregs -= copy_num;
else if (!maybe_builtin_apply
else if (!multi_reg_return
|| !targetm.calls.function_value_regno_p
(copy_start))
break;
@ -393,7 +394,7 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
isolated use. */
if (return_copy == BB_HEAD (src_bb))
{
short_block = 1;
short_block = true;
break;
}
last_insn = return_copy;