MIPS: Remove -m(no-)lra option

PR target/113955
The `-mlra` option was introduced in 2014 for MIPS, and was set to
default since then.  It's time for us to drop no-lra support by
dropping -m(no-)lra options.

gcc:
	* config/mips/mips.cc(mips_option_override):
	Drop mips_lra_flag variable;
	(mips_lra_p): Removed.
	(TARGET_LRA_P): Remove definition here to use the default one.
	* config/mips/mips.md(*mul_acc_si, *mul_acc_si_r3900, *mul_sub_si):
	Drop mips_lra_flag variable.
	* config/mips/mips.opt(-mlra): Removed.
	* config/mips/mips.opt.urls(mlra): Removed.

4 files changed, 3 insertions, 39 deletions

diff --git a/gcc/config/mips/mips.cc b/gcc/config/mips/mips.cc
index ce764a5..b63d40a 100644
--- a/gcc/config/mips/mips.cc
+++ b/gcc/config/mips/mips.cc
@@ -20391,8 +20391,6 @@ mips_option_override (void)
     error ("unsupported combination: %s", "-mfp64 -mfpxx");
   else if (ISA_MIPS1 && !TARGET_FLOAT32)
     error ("%<-march=%s%> requires %<-mfp32%>", mips_arch_info->name);
-  else if (TARGET_FLOATXX && !mips_lra_flag)
-    error ("%<-mfpxx%> requires %<-mlra%>");
 
   /* End of code shared with GAS.  */
 
@@ -22871,14 +22869,6 @@ mips_spill_class (reg_class_t rclass ATTRIBUTE_UNUSED,
   return NO_REGS;
 }
 
-/* Implement TARGET_LRA_P.  */
-
-static bool
-mips_lra_p (void)
-{
-  return mips_lra_flag;
-}
-
 /* Implement TARGET_IRA_CHANGE_PSEUDO_ALLOCNO_CLASS.  */
 
 static reg_class_t
@@ -23307,8 +23297,6 @@ mips_bit_clear_p (enum machine_mode mode, unsigned HOST_WIDE_INT m)
 
 #undef TARGET_SPILL_CLASS
 #define TARGET_SPILL_CLASS mips_spill_class
-#undef TARGET_LRA_P
-#define TARGET_LRA_P mips_lra_p
 #undef TARGET_IRA_CHANGE_PSEUDO_ALLOCNO_CLASS
 #define TARGET_IRA_CHANGE_PSEUDO_ALLOCNO_CLASS mips_ira_change_pseudo_allocno_class
 
diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md
index 26f758c..7de8512 100644
--- a/gcc/config/mips/mips.md
+++ b/gcc/config/mips/mips.md
@@ -1781,13 +1781,7 @@
    (set_attr "mode"	"SI")
    (set_attr "insn_count" "1,1,2")
    (set (attr "enabled")
-        (cond [(and (eq_attr "alternative" "0")
-                    (match_test "!mips_lra_flag"))
-                  (const_string "yes")
-               (and (eq_attr "alternative" "1")
-                    (match_test "mips_lra_flag"))
-                  (const_string "yes")
-               (eq_attr "alternative" "2")
+        (cond [(eq_attr "alternative" "1,2")
                   (const_string "yes")]
               (const_string "no")))])
 
@@ -1811,13 +1805,7 @@
    (set_attr "mode"	"SI")
    (set_attr "insn_count" "1,1,1,2")
    (set (attr "enabled")
-        (cond [(and (eq_attr "alternative" "0")
-                    (match_test "!mips_lra_flag"))
-                  (const_string "yes")
-               (and (eq_attr "alternative" "1")
-                    (match_test "mips_lra_flag"))
-                  (const_string "yes")
-               (eq_attr "alternative" "2,3")
+        (cond [(eq_attr "alternative" "1,2,3")
                   (const_string "yes")]
               (const_string "no")))])
 
@@ -2039,13 +2027,7 @@
    (set_attr "mode"     "SI")
    (set_attr "insn_count" "1,1,2")
    (set (attr "enabled")
-        (cond [(and (eq_attr "alternative" "0")
-                    (match_test "!mips_lra_flag"))
-                  (const_string "yes")
-               (and (eq_attr "alternative" "1")
-                    (match_test "mips_lra_flag"))
-                  (const_string "yes")
-               (eq_attr "alternative" "2")
+        (cond [(eq_attr "alternative" "1,2")
                   (const_string "yes")]
               (const_string "no")))])
 
diff --git a/gcc/config/mips/mips.opt b/gcc/config/mips/mips.opt
index c1abb36..99fe930 100644
--- a/gcc/config/mips/mips.opt
+++ b/gcc/config/mips/mips.opt
@@ -413,10 +413,6 @@ msynci
 Target Mask(SYNCI)
 Use synci instruction to invalidate i-cache.
 
-mlra
-Target Var(mips_lra_flag) Init(1) Save
-Use LRA instead of reload.
-
 mlxc1-sxc1
 Target Var(mips_lxc1_sxc1) Init(1)
 Use lwxc1/swxc1/ldxc1/sdxc1 instructions where applicable.
diff --git a/gcc/config/mips/mips.opt.urls b/gcc/config/mips/mips.opt.urls
index 9d16664..5921d69 100644
--- a/gcc/config/mips/mips.opt.urls
+++ b/gcc/config/mips/mips.opt.urls
@@ -222,8 +222,6 @@ UrlSuffix(gcc/MIPS-Options.html#index-msym32)
 msynci
 UrlSuffix(gcc/MIPS-Options.html#index-msynci)
 
-; skipping UrlSuffix for 'mlra' due to finding no URLs
-
 mlxc1-sxc1
 UrlSuffix(gcc/MIPS-Options.html#index-mlxc1-sxc1)