alpha.c (alpha_does_function_need_gp): Test TARGET_PROFILING_NEEDS_GP in the if,…

alpha.c (alpha_does_function_need_gp): Test TARGET_PROFILING_NEEDS_GP in the if, instead of with an ifdef.

        * config/alpha/alpha.c (alpha_does_function_need_gp): Test
        TARGET_PROFILING_NEEDS_GP in the if, instead of with an ifdef.
        (alpha_expand_prologue): Emit prologue_mcount if needed.
        * config/alpha/alpha.h (TARGET_PROFILING_NEEDS_GP): Default to 0.
        * config/alpha/alpha.md (prologue_mcount): New.
        * config/alpha/linux.h (FUNCTION_PROFILER): Remove.
        (TARGET_PROFILING_NEEDS_GP): Undef before redefining.
        * config/alpha/netbsd.h: Likewise.

From-SVN: r34222

gcc/ChangeLog

 2000-05-27  Richard Henderson  <rth@cygnus.com>
 
+	* config/alpha/alpha.c (alpha_does_function_need_gp): Test
+	TARGET_PROFILING_NEEDS_GP in the if, instead of with an ifdef.
+	(alpha_expand_prologue): Emit prologue_mcount if needed.
+	* config/alpha/alpha.h (TARGET_PROFILING_NEEDS_GP): Default to 0.
+	* config/alpha/alpha.md (prologue_mcount): New.
+	* config/alpha/linux.h (FUNCTION_PROFILER): Remove.
+	(TARGET_PROFILING_NEEDS_GP): Undef before redefining.
+	* config/alpha/netbsd.h: Likewise.
+
+2000-05-27  Richard Henderson  <rth@cygnus.com>
+
 	* config/alpha/elf.h (SELECT_SECTION): Mirror Kenner's May 19
 	change to config/elfos.h.
 

gcc/config/alpha/alpha.c

@@ -4056,10 +4056,8 @@ alpha_does_function_need_gp ()
   if (TARGET_WINDOWS_NT || TARGET_OPEN_VMS)
     return 0;
 
-#ifdef TARGET_PROFILING_NEEDS_GP
-  if (profile_flag)
+  if (TARGET_PROFILING_NEEDS_GP && profile_flag)
     return 1;
-#endif
 
 #ifdef ASM_OUTPUT_MI_THUNK
   if (current_function_is_thunk)
@@ -4190,6 +4188,13 @@ alpha_expand_prologue ()
 	emit_insn (gen_prologue_ldgp ());
     }
 
+  /* TARGET_PROFILING_NEEDS_GP actually implies that we need to insert
+     the call to mcount ourselves, rather than having the linker do it
+     magically in response to -pg.  Since _mcount has special linkage,
+     don't represent the call as a call.  */
+  if (TARGET_PROFILING_NEEDS_GP && profile_flag)
+    emit_insn (gen_prologue_mcount ());
+      
   /* Adjust the stack by the frame size.  If the frame size is > 4096
      bytes, we need to be sure we probe somewhere in the first and last
      4096 bytes (we can probably get away without the latter test) and

gcc/config/alpha/alpha.h

@@ -185,6 +185,9 @@ extern enum alpha_fp_trap_mode alpha_fptm;
 #ifndef TARGET_HAS_XFLOATING_LIBS
 #define TARGET_HAS_XFLOATING_LIBS 0
 #endif
+#ifndef TARGET_PROFILING_NEEDS_GP
+#define TARGET_PROFILING_NEEDS_GP 0
+#endif
 
 /* Macro to define tables used to set the flags.
    This is a list in braces of pairs in braces,

gcc/config/alpha/alpha.md

@@ -41,6 +41,9 @@
 ;;	5	prologue_stack_probe_loop
 ;;	6	realign
 ;;	7	exception_receiver
+;;	8	prologue_mcount
+;;	9	prologue_ldgp_1
+;;	10	prologue_ldgp_2
 
 ;; Processor type -- this attribute must exactly match the processor_type
 ;; enumeration in alpha.h.
@@ -5613,6 +5616,17 @@
   "! TARGET_OPEN_VMS && ! TARGET_WINDOWS_NT"
   "")
 
+;; The _mcount profiling hook has special calling conventions, and
+;; does not clobber all the registers that a normal call would.  So
+;; hide the fact this is a call at all.
+
+(define_insn "prologue_mcount"
+  [(unspec_volatile [(const_int 0)] 8)]
+  ""
+  "lda $28,_mcount\;jsr $28,($28),_mcount"
+  [(set_attr "type" "multi")
+   (set_attr "length" "8")])
+
 (define_insn "init_fp"
   [(set (match_operand:DI 0 "register_operand" "=r")
         (match_operand:DI 1 "register_operand" "r"))

gcc/config/alpha/linux.h

@@ -31,11 +31,8 @@ SUB_CPP_PREDEFINES
 #undef LIB_SPEC
 #define LIB_SPEC "%{pg:-lgmon} %{pg:-lc_p} %{!pg:-lc}"
 
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE, LABELNO)			\
-	fputs ("\tlda $28,_mcount\n\tjsr $28,($28),_mcount\n", (FILE))
-
 /* Show that we need a GP when profiling.  */
+#undef TARGET_PROFILING_NEEDS_GP
 #define TARGET_PROFILING_NEEDS_GP 1
 
 /* Don't care about faults in the prologue.  */

gcc/config/alpha/netbsd.h

@@ -28,9 +28,6 @@ Boston, MA 02111-1307, USA.  */
 #undef LIB_SPEC
 #define LIB_SPEC "%{pg:-lgmon} %{pg:-lc_p} %{!pg:-lc}"
 
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE, LABELNO)			\
-	fputs ("\tlda $28,_mcount\n\tjsr $28,($28),_mcount\n", (FILE))
-
 /* Show that we need a GP when profiling.  */
-#define TARGET_PROFILING_NEEDS_GP
+#undef TARGET_PROFILING_NEEDS_GP
+#define TARGET_PROFILING_NEEDS_GP 1