This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[PATCH][AAarch64][v3] Add support for TARGET_COMPUTE_FRAME_LAYOUT


Hi,

The patch adds support for the TARGET_COMPUTE_FRAME_LAYOUT hook on AArch64
and removes unneeded frame layout recalculation.

The removed aarch64_layout_frame calls are unnecessary because the functions in which
they appear will be called during or after the reload pass in which the TARGET_COMPUTE_FRAME_LAYOUT
hook is called. The if statement in aarch64_layout_frame had the purpose of avoiding
the extra work from the calls which have been removed and is now redundant.

Bootstrapped and regtested on aarch64-none-linux-gnu and there are no regressions.

Thanks,
Vlad

gcc/
2018-08-06  Vlad Lazar  <vlad.lazar@arm.com>

	* config/aarch64/aarch64.h (TARGET_COMPUTE_FRAME_LAYOUT): Define.
	* config/aarch64/aarch64.c (aarch64_expand_prologue): Remove aarch64_layout_frame call.
	(aarch64_expand_epilogue): Likewise.
	(aarch64_initial_elimination_offset): Likewise.
	(aarch64_get_separate_components): Likewise.
	(aarch64_use_return_insn_p): Likewise.
	(aarch64_layout_frame): Remove unneeded check.

---

diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index 976f9afae54c1c98c22a4d5002d8d94e33b3190a..02aaa333fb57eff918049681173403f004a8a8e3 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -478,6 +478,9 @@ extern unsigned aarch64_architecture_version;
 #undef DONT_USE_BUILTIN_SETJMP
 #define DONT_USE_BUILTIN_SETJMP 1
+#undef TARGET_COMPUTE_FRAME_LAYOUT
+#define TARGET_COMPUTE_FRAME_LAYOUT aarch64_layout_frame
+
 /* Register in which the structure value is to be returned.  */
 #define AARCH64_STRUCT_VALUE_REGNUM R8_REGNUM
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index b88e7cac27ab76e01b9769563ec9077d2a81bd7b..6a52eecf94011f5a7ee787c1295ca24732af2ff4 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -4021,9 +4021,6 @@ aarch64_layout_frame (void)
   HOST_WIDE_INT offset = 0;
   int regno, last_fp_reg = INVALID_REGNUM;
- if (reload_completed && cfun->machine->frame.laid_out)
-    return;
-
   cfun->machine->frame.emit_frame_chain = aarch64_needs_frame_chain ();
#define SLOT_NOT_REQUIRED (-2)
@@ -4567,8 +4564,6 @@ offset_12bit_unsigned_scaled_p (machine_mode mode, poly_int64 offset)
 static sbitmap
 aarch64_get_separate_components (void)
 {
-  aarch64_layout_frame ();
-
   sbitmap components = sbitmap_alloc (LAST_SAVED_REGNUM + 1);
   bitmap_clear (components);
@@ -4592,7 +4587,7 @@ aarch64_get_separate_components (void) unsigned reg1 = cfun->machine->frame.wb_candidate1;
   unsigned reg2 = cfun->machine->frame.wb_candidate2;
-  /* If aarch64_layout_frame has chosen registers to store/restore with
+  /* If registers have been chosen to be stored/restored with
      writeback don't interfere with them to avoid having to output explicit
      stack adjustment instructions.  */
   if (reg2 != INVALID_REGNUM)
@@ -4850,8 +4845,6 @@ aarch64_add_cfa_expression (rtx_insn *insn, unsigned int reg,
 void
 aarch64_expand_prologue (void)
 {
-  aarch64_layout_frame ();
-
   poly_int64 frame_size = cfun->machine->frame.frame_size;
   poly_int64 initial_adjust = cfun->machine->frame.initial_adjust;
   HOST_WIDE_INT callee_adjust = cfun->machine->frame.callee_adjust;
@@ -4964,8 +4957,6 @@ aarch64_use_return_insn_p (void)
   if (crtl->profile)
     return false;
- aarch64_layout_frame ();
-
   return known_eq (cfun->machine->frame.frame_size, 0);
 }
@@ -4977,8 +4968,6 @@ aarch64_use_return_insn_p (void)
 void
 aarch64_expand_epilogue (bool for_sibcall)
 {
-  aarch64_layout_frame ();
-
   poly_int64 initial_adjust = cfun->machine->frame.initial_adjust;
   HOST_WIDE_INT callee_adjust = cfun->machine->frame.callee_adjust;
   poly_int64 final_adjust = cfun->machine->frame.final_adjust;
@@ -7525,8 +7514,6 @@ aarch64_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to)
 poly_int64
 aarch64_initial_elimination_offset (unsigned from, unsigned to)
 {
-  aarch64_layout_frame ();
-
   if (to == HARD_FRAME_POINTER_REGNUM)
     {
       if (from == ARG_POINTER_REGNUM)


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]