From: Chung-Ju Wu <jasonwucj@gmail.com>
Date: Sun, 22 Apr 2018 10:10:00 +0000 (+0000)
Subject: [NDS32] Add new option -malways-save-lp.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1311665187d54b68fc88f75685ccd28b6d3e2ebc;p=gcc.git

[NDS32] Add new option -malways-save-lp.

gcc/
	* config/nds32/nds32.c (nds32_compute_stack_frame): Consider
	flag_always_save_lp condition.
	* config/nds32/nds32.opt (malways-save-lp): New option.

From-SVN: r259553
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3aa554236ca..c9a0d04fc46 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-04-22  Chung-Ju Wu  <jasonwucj@gmail.com>
+
+	* config/nds32/nds32.c (nds32_compute_stack_frame): Consider
+	flag_always_save_lp condition.
+	* config/nds32/nds32.opt (malways-save-lp): New option.
+
 2018-04-22  Shiva Chen  <shiva0217@gmail.com>
 
 	* config/nds32/nds32-protos.h (nds32_use_load_post_increment): Declare.
diff --git a/gcc/config/nds32/nds32.c b/gcc/config/nds32/nds32.c
index 9a8c71204ea..8994c13d7b0 100644
--- a/gcc/config/nds32/nds32.c
+++ b/gcc/config/nds32/nds32.c
@@ -436,7 +436,8 @@ nds32_compute_stack_frame (void)
 
   /* If $lp value is required to be saved on stack, it needs 4 bytes space.
      Check whether $lp is ever live.  */
-  cfun->machine->lp_size = (df_regs_ever_live_p (LP_REGNUM)) ? 4 : 0;
+  cfun->machine->lp_size
+    = (flag_always_save_lp || df_regs_ever_live_p (LP_REGNUM)) ? 4 : 0;
 
   /* Initially there is no padding bytes.  */
   cfun->machine->callee_saved_area_gpr_padding_bytes = 0;
diff --git a/gcc/config/nds32/nds32.opt b/gcc/config/nds32/nds32.opt
index dd9b3d1b72c..dcf6d396bc3 100644
--- a/gcc/config/nds32/nds32.opt
+++ b/gcc/config/nds32/nds32.opt
@@ -321,6 +321,10 @@ mext-fpu-dp
 Target Report Mask(FPU_DOUBLE)
 Generate double-precision floating-point instructions.
 
+malways-save-lp
+Target Var(flag_always_save_lp) Init(0)
+Always save $lp in the stack.
+
 munaligned-access
 Target Report Var(flag_unaligned_access) Init(0)
 Enable unaligned word and halfword accesses to packed data.