diff mbox

[RFC,5/9,SH] Add -mlra option

Message ID 20141218.100132.509297214.kkojima@rr.iij4u.or.jp
State New
Headers show

Commit Message

Kaz Kojima Dec. 18, 2014, 1:01 a.m. UTC 
This patch adds -mlra option to SH.  -mno-lra is default ATM.

--
	* config/sh/sh.c (sh_lra_p): New function.
	(TARGET_LRA_P): Define.
	(sh_legitimize_reload_address): Return false if sh_lra_p is true.
	* config/sh/sh.opt (mlra): New option.
diff mbox

Patch

diff --git a/config/sh/sh.c b/config/sh/sh.c
index 6f34b33..42f29e6 100644
--- a/config/sh/sh.c
+++ b/config/sh/sh.c
@@ -222,6 +222,7 @@  static int sh_mode_after (int, int, rtx_insn *);
 static int sh_mode_entry (int);
 static int sh_mode_exit (int);
 static int sh_mode_priority (int entity, int n);
+static bool sh_lra_p (void);
 
 static rtx mark_constant_pool_use (rtx);
 static tree sh_handle_interrupt_handler_attribute (tree *, tree, tree,
@@ -620,6 +621,9 @@  static const struct attribute_spec sh_attribute_table[] =
 #undef  TARGET_ENCODE_SECTION_INFO
 #define TARGET_ENCODE_SECTION_INFO	sh_encode_section_info
 
+#undef TARGET_LRA_P
+#define TARGET_LRA_P sh_lra_p
+
 #undef TARGET_SECONDARY_RELOAD
 #define TARGET_SECONDARY_RELOAD sh_secondary_reload
 
@@ -10484,6 +10488,9 @@  sh_legitimize_reload_address (rtx *p, machine_mode mode, int opnum,
   enum reload_type type = (enum reload_type) itype;
   const int mode_sz = GET_MODE_SIZE (mode);
 
+  if (sh_lra_p ())
+    return false;
+
   if (! ALLOW_INDEXED_ADDRESS
       && GET_CODE (*p) == PLUS
       && REG_P (XEXP (*p, 0)) && REG_P (XEXP (*p, 1)))
@@ -13774,6 +13781,13 @@  sh_mode_priority (int entity ATTRIBUTE_UNUSED, int n)
   return ((TARGET_FPU_SINGLE != 0) ^ (n) ? FP_MODE_SINGLE : FP_MODE_DOUBLE);
 }
 
+/* Return true if we use LRA instead of reload pass.  */
+static bool
+sh_lra_p (void)
+{
+  return sh_lra_flag;
+}
+
 /* Implement TARGET_USE_BY_PIECES_INFRASTRUCTURE_P.  */
 
 static bool
diff --git a/config/sh/sh.opt b/config/sh/sh.opt
index bb6d395..d8e9bb8 100644
--- a/config/sh/sh.opt
+++ b/config/sh/sh.opt
@@ -360,3 +360,6 @@  mfsrra
 Target Var(TARGET_FSRRA)
 Enable the use of the fsrra instruction
 
+mlra
+Target Report Var(sh_lra_flag) Init(0) Save
+Use LRA instead of reload (transitional)