From: Richard Henderson <rth@redhat.com>
Date: Sun, 26 May 2002 02:03:35 +0000 (-0700)
Subject: sparc.c (sparc_output_mi_thunk): New implementation using rtl instead of fprintf.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e133041bb61c6304eea47dca57fe48c3bd387ab8;p=gcc.git

sparc.c (sparc_output_mi_thunk): New implementation using rtl instead of fprintf.

        * config/sparc/sparc.c (sparc_output_mi_thunk): New implementation
        using rtl instead of fprintf.
        * config/sparc/sparc.h (ASM_OUTPUT_MI_THUNK): Use it.
        * config/sparc/sparc-protos.h: Update.

From-SVN: r53880
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9849c73315a..e76b87f6f03 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2002-05-25  Richard Henderson  <rth@redhat.com>
+
+	PR target/6788
+	* config/sparc/sparc.c (sparc_output_mi_thunk): New implementation
+	using rtl instead of fprintf.
+	* config/sparc/sparc.h (ASM_OUTPUT_MI_THUNK): Use it.
+	* config/sparc/sparc-protos.h: Update.
+
 2002-05-25  Neil Booth  <neil@daikokuya.demon.co.uk>
 
 	* Makefile.in (C_COMMON_H): Fix.
diff --git a/gcc/config/sparc/sparc-protos.h b/gcc/config/sparc/sparc-protos.h
index 427aaba1864..c759631d60c 100644
--- a/gcc/config/sparc/sparc-protos.h
+++ b/gcc/config/sparc/sparc-protos.h
@@ -124,4 +124,6 @@ extern int sparc_extra_constraint_check PARAMS ((rtx, int, int));
 extern int sparc_rtx_costs PARAMS ((rtx, enum rtx_code, enum rtx_code));
 #endif /* RTX_CODE */
 
+extern void sparc_output_mi_thunk PARAMS ((FILE *, tree, HOST_WIDE_INT, tree));
+
 #endif /* __SPARC_PROTOS_H__ */
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c
index fd1cd65d424..acc04d2e867 100644
--- a/gcc/config/sparc/sparc.c
+++ b/gcc/config/sparc/sparc.c
@@ -8474,3 +8474,70 @@ sparc_encode_section_info (decl, first)
   if (TARGET_CM_EMBMEDANY && TREE_CODE (decl) == FUNCTION_DECL)
     SYMBOL_REF_FLAG (XEXP (DECL_RTL (decl), 0)) = 1;
 }
+
+/* Output code to add DELTA to the first argument, and then jump to FUNCTION.
+   Used for C++ multiple inheritance.  */
+
+void
+sparc_output_mi_thunk (file, thunk_fndecl, delta, function)
+     FILE *file;
+     tree thunk_fndecl ATTRIBUTE_UNUSED;
+     HOST_WIDE_INT delta;
+     tree function;
+{
+  rtx this, insn, funexp, delta_rtx, tmp;
+
+  reload_completed = 1;
+  no_new_pseudos = 1;
+  current_function_uses_only_leaf_regs = 1;
+
+  emit_note (NULL, NOTE_INSN_PROLOGUE_END);
+
+  /* Find the "this" pointer.  Normally in %o0, but in ARCH64 if the function
+     returns a structure, the structure return pointer is there instead.  */
+  if (TARGET_ARCH64 && aggregate_value_p (TREE_TYPE (TREE_TYPE (function))))
+    this = gen_rtx_REG (Pmode, SPARC_INCOMING_INT_ARG_FIRST + 1);
+  else
+    this = gen_rtx_REG (Pmode, SPARC_INCOMING_INT_ARG_FIRST);
+
+  /* Add DELTA.  When possible use a plain add, otherwise load it into
+     a register first.  */
+  delta_rtx = GEN_INT (delta);
+  if (!SPARC_SIMM13_P (delta))
+    {
+      rtx scratch = gen_rtx_REG (Pmode, 1);
+      if (TARGET_ARCH64)
+	sparc_emit_set_const64 (scratch, delta_rtx);
+      else
+	sparc_emit_set_const32 (scratch, delta_rtx);
+      delta_rtx = scratch;
+    }
+
+  tmp = gen_rtx_PLUS (Pmode, this, delta_rtx);
+  emit_insn (gen_rtx_SET (VOIDmode, this, tmp));
+
+  /* Generate a tail call to the target function.  */
+  if (! TREE_USED (function))
+    {
+      assemble_external (function);
+      TREE_USED (function) = 1;
+    }
+  funexp = XEXP (DECL_RTL (function), 0);
+  funexp = gen_rtx_MEM (FUNCTION_MODE, funexp);
+  insn = emit_call_insn (gen_sibcall (funexp));
+  SIBLING_CALL_P (insn) = 1;
+  emit_barrier ();
+
+  /* Run just enough of rest_of_compilation to get the insns emitted.
+     There's not really enough bulk here to make other passes such as
+     instruction scheduling worth while.  Note that use_thunk calls
+     assemble_start_function and assemble_end_function.  */
+  insn = get_insns ();
+  shorten_branches (insn);
+  final_start_function (insn, file, 1);
+  final (insn, file, 1, 0);
+  final_end_function ();
+
+  reload_completed = 0;
+  no_new_pseudos = 0;
+}
diff --git a/gcc/config/sparc/sparc.h b/gcc/config/sparc/sparc.h
index 8af36e3551c..12490d38a42 100644
--- a/gcc/config/sparc/sparc.h
+++ b/gcc/config/sparc/sparc.h
@@ -2874,24 +2874,8 @@ do {									\
 
 /* Output code to add DELTA to the first argument, and then jump to FUNCTION.
    Used for C++ multiple inheritance.  */
-#define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION)	\
-do {									\
-  int reg = 0;								\
-									\
-  if (TARGET_ARCH64							\
-      && aggregate_value_p (TREE_TYPE (TREE_TYPE (FUNCTION))))		\
-    reg = 1;								\
-  if ((DELTA) >= 4096 || (DELTA) < -4096)				\
-    fprintf (FILE, "\tset\t%d, %%g1\n\tadd\t%%o%d, %%g1, %%o%d\n",	\
-	     (int)(DELTA), reg, reg);					\
-  else									\
-    fprintf (FILE, "\tadd\t%%o%d, %d, %%o%d\n", reg, (int)(DELTA), reg);\
-  fprintf (FILE, "\tor\t%%o7, %%g0, %%g1\n");				\
-  fprintf (FILE, "\tcall\t");						\
-  assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));	\
-  fprintf (FILE, ", 0\n");						\
-  fprintf (FILE, "\t or\t%%g1, %%g0, %%o7\n");				\
-} while (0)
+#define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
+  sparc_output_mi_thunk (FILE, THUNK_FNDECL, DELTA, FUNCTION)
 
 #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
   ((CHAR) == '#' || (CHAR) == '*' || (CHAR) == '^' || (CHAR) == '(' || (CHAR) == '_')