alpha.c (find_lo_sum_using_gp): Rename from find_lo_sum; also check that GP is being used.

        * config/alpha/alpha.c (find_lo_sum_using_gp): Rename from find_lo_sum;
        also check that GP is being used.
        (alpha_find_lo_sum_using_gp): New.
        (alpha_does_function_need_gp): Use get_attr_usegp.
        * config/alpha/alpha-protos.h: Update.
        * config/alpha/alpha.md (attr usegp): New.  Annotate patterns
        as needed.

From-SVN: r61376

4 files changed, 50 insertions, 19 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a98b2b3..3b7e2f6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2003-01-15  Richard Henderson  <rth@redhat.com>
+
+	* config/alpha/alpha.c (find_lo_sum_using_gp): Rename from find_lo_sum;
+	also check that GP is being used.
+	(alpha_find_lo_sum_using_gp): New.
+	(alpha_does_function_need_gp): Use get_attr_usegp.
+	* config/alpha/alpha-protos.h: Update.
+	* config/alpha/alpha.md (attr usegp): New.  Annotate patterns
+	as needed.
+
 2003-01-15  Roger Sayle  <roger@eyesopen.com>
 
 	* gcse.c (one_cprop_pass): Change function arguments to take both
diff --git a/gcc/config/alpha/alpha-protos.h b/gcc/config/alpha/alpha-protos.h
index e19f7cb..3bd852c 100644
--- a/gcc/config/alpha/alpha-protos.h
+++ b/gcc/config/alpha/alpha-protos.h
@@ -1,5 +1,5 @@
 /* Prototypes for alpha.c functions used in the md file & elsewhere.
-   Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -142,6 +142,8 @@ extern rtx function_arg PARAMS ((CUMULATIVE_ARGS, enum machine_mode,
 extern void alpha_start_function PARAMS ((FILE *, const char *, tree));
 extern void alpha_end_function PARAMS ((FILE *, const char *, tree));
 
+extern int alpha_find_lo_sum_using_gp PARAMS ((rtx));
+
 #ifdef REAL_VALUE_TYPE
 extern int check_float_value PARAMS ((enum machine_mode,
 				      REAL_VALUE_TYPE *, int));
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index 1857374..2d38f2c 100644
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -155,7 +155,7 @@ static rtx alpha_expand_builtin
   PARAMS ((tree, rtx, rtx, enum machine_mode, int));
 static void alpha_sa_mask
   PARAMS ((unsigned long *imaskP, unsigned long *fmaskP));
-static int find_lo_sum
+static int find_lo_sum_using_gp
   PARAMS ((rtx *, void *));
 static int alpha_does_function_need_gp
   PARAMS ((void));
@@ -6970,11 +6970,18 @@ const struct attribute_spec vms_attribute_table[] =
 #endif
 
 static int
-find_lo_sum (px, data)
+find_lo_sum_using_gp (px, data)
      rtx *px;
      void *data ATTRIBUTE_UNUSED;
 {
-  return GET_CODE (*px) == LO_SUM;
+  return GET_CODE (*px) == LO_SUM && XEXP (*px, 0) == pic_offset_table_rtx;
+}
+
+int
+alpha_find_lo_sum_using_gp (insn)
+     rtx insn;
+{
+  return for_each_rtx (&PATTERN (insn), find_lo_sum_using_gp, NULL) > 0;
 }
 
 static int
@@ -7003,15 +7010,9 @@ alpha_does_function_need_gp ()
   for (; insn; insn = NEXT_INSN (insn))
     if (INSN_P (insn)
 	&& GET_CODE (PATTERN (insn)) != USE
-	&& GET_CODE (PATTERN (insn)) != CLOBBER)
-      {
-	enum attr_type type = get_attr_type (insn);
-	if (type == TYPE_LDSYM || type == TYPE_JSR)
-	  return 1;
-	if (TARGET_EXPLICIT_RELOCS
-	    && for_each_rtx (&PATTERN (insn), find_lo_sum, NULL) > 0)
-	  return 1;
-      }
+	&& GET_CODE (PATTERN (insn)) != CLOBBER
+	&& get_attr_usegp (insn))
+      return 1;
 
   return 0;
 }
diff --git a/gcc/config/alpha/alpha.md b/gcc/config/alpha/alpha.md
index ed93441..c943527 100644
--- a/gcc/config/alpha/alpha.md
+++ b/gcc/config/alpha/alpha.md
@@ -142,6 +142,18 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
 
 (define_attr "length" ""
   (const_int 4))
+
+;; The USEGP attribute marks instructions that have relocations that use
+;; the GP.
+
+(define_attr "usegp" "no,yes"
+  (cond [(eq_attr "type" "ldsym,jsr")
+	   (const_string "yes")
+	 (eq_attr "type" "ild,fld,ist,fst")
+	   (symbol_ref "alpha_find_lo_sum_using_gp(insn)")
+	]
+	(const_string "no")))
+
 
 ;; Include scheduling descriptions.
   
@@ -402,7 +414,8 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
 	(plus:DI (match_operand:DI 1 "register_operand" "r")
 		 (high:DI (match_operand:DI 2 "local_symbolic_operand" ""))))]
   "TARGET_EXPLICIT_RELOCS"
-  "ldah %0,%2(%1)\t\t!gprelhigh")
+  "ldah %0,%2(%1)\t\t!gprelhigh"
+  [(set_attr "usegp" "yes")])
 
 (define_split
   [(set (match_operand:DI 0 "register_operand" "")
@@ -5304,7 +5317,8 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
     return "lda %0,%2(%1)\t\t!gprel";
   else
     return "lda %0,%2(%1)\t\t!gprellow";
-})
+}
+  [(set_attr "usegp" "yes")])
 
 (define_split
   [(set (match_operand:DI 0 "register_operand" "")
@@ -5426,7 +5440,8 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
 		   UNSPEC_DTPREL))]
   "HAVE_AS_TLS"
   "ldq %0,%2(%1)\t\t!gotdtprel"
-  [(set_attr "type" "ild")])
+  [(set_attr "type" "ild")
+   (set_attr "usegp" "yes")])
 
 (define_split
   [(set (match_operand:DI 0 "register_operand" "")
@@ -5447,7 +5462,8 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
 		   UNSPEC_TPREL))]
   "HAVE_AS_TLS"
   "ldq %0,%2(%1)\t\t!gottprel"
-  [(set_attr "type" "ild")])
+  [(set_attr "type" "ild")
+   (set_attr "usegp" "yes")])
 
 (define_split
   [(set (match_operand:DI 0 "register_operand" "")
@@ -5478,7 +5494,8 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
    fmov %R1,%0
    ldt %0,%1
    stt %R1,%0"
-  [(set_attr "type" "ilog,iadd,iadd,iadd,ldsym,ild,ist,fcpys,fld,fst")])
+  [(set_attr "type" "ilog,iadd,iadd,iadd,ldsym,ild,ist,fcpys,fld,fst")
+   (set_attr "usegp" "*,*,*,yes,*,*,*,*,*,*")])
 
 ;; The 'U' constraint matches symbolic operands on Unicos/Mk. Those should
 ;; have been split up by the rules above but we shouldn't reject the
@@ -5525,7 +5542,8 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
    stt %R1,%0
    ftoit %1,%0
    itoft %1,%0"
-  [(set_attr "type" "ilog,iadd,iadd,iadd,ldsym,ild,ist,fcpys,fld,fst,ftoi,itof")])
+  [(set_attr "type" "ilog,iadd,iadd,iadd,ldsym,ild,ist,fcpys,fld,fst,ftoi,itof")
+   (set_attr "usegp" "*,*,*,yes,*,*,*,*,*,*,*,*")])
 
 (define_insn "*movdi_fix"
   [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r,r,r,r,m,*f,*f,Q,r,*f")