Add -mno-traceback option; eliminate nop after call on V.4/eabi

From-SVN: r9176

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 170ae1cbbed7138c43080c1767e6521956ccd6ec..4334237388bd219cb78e94c63e1f1fa0e03f4423 100644 (file)
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -4909,16 +4909,18 @@
   ""
   "*
 {
-  if (GET_CODE (operands[0]) == REG)
-    {
 #ifndef USING_SVR4_H
-      return \"{brl|blrl}\;{l|lwz} 2,20(1)\";
-#else
-      return \"{brl|blrl}\";
-#endif
-    }
+  if (GET_CODE (operands[1]) == REG)
+    return \"{brl|blrl}\;{l|lwz} 2,20(1)\";
 
   return \"bl %z0\;%.\";
+
+#else
+  if (GET_CODE (operands[1]) == REG)
+    return \"{brl|blrl}\";
+
+  return \"bl %z0\";
+#endif
 }"
   [(set_attr "length" "8")])
 
@@ -4938,16 +4940,18 @@
   ""
   "*
 {
-  if (GET_CODE (operands[1]) == REG)
-    {
 #ifndef USING_SVR4_H
-      return \"{brl|blrl}\;{l|lwz} 2,20(1)\";
-#else
-      return \"{brl|blrl}\";
-#endif
-    }
+  if (GET_CODE (operands[1]) == REG)
+    return \"{brl|blrl}\;{l|lwz} 2,20(1)\";
 
   return \"bl %z1\;%.\";
+
+#else
+  if (GET_CODE (operands[1]) == REG)
+    return \"{brl|blrl}\";
+
+  return \"bl %z1\";
+#endif
 }"
   [(set_attr "length" "8")])
 

diff --git a/gcc/config/rs6000/sysv4.h b/gcc/config/rs6000/sysv4.h
index 4a4ee0ac2a093516fe068e393bacc4990a01de8c..54f233dd1cb6c1b2602709fb32ff7ce515a17355 100644 (file)
--- a/gcc/config/rs6000/sysv4.h
+++ b/gcc/config/rs6000/sysv4.h
@@ -24,11 +24,14 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #define        MASK_NO_BITFIELD_TYPE   0x40000000      /* Set PCC_BITFIELD_TYPE_MATTERS to 0 */
 #define        MASK_STRICT_ALIGN       0x20000000      /* Set STRICT_ALIGNMENT to 1.  */
 #define MASK_RELOCATABLE       0x10000000      /* GOT pointers are PC relative */
+#define        MASK_NO_TRACEBACK       0x08000000      /* eliminate traceback words */
 
 #define        TARGET_NO_BITFIELD_TYPE (target_flags & MASK_NO_BITFIELD_TYPE)
 #define        TARGET_BITFIELD_TYPE    (! TARGET_NO_BITFIELD_TYPE)
 #define TARGET_STRICT_ALIGN    (target_flags & MASK_STRICT_ALIGN)
 #define TARGET_RELOCATABLE     (target_flags & MASK_RELOCATABLE)
+#define TARGET_NO_TRACEBACK    (target_flags & MASK_NO_TRACEBACK)
+#define        TARGET_TRACEBACK        (! TARGET_NO_TRACEBACK)
 
 #undef SUBTARGET_SWITCHES
 #define SUBTARGET_SWITCHES                                             \
@@ -37,7 +40,9 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
   { "strict-align",     MASK_STRICT_ALIGN },                           \
   { "no-strict-align", -MASK_STRICT_ALIGN },                           \
   { "relocatable",      MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC }, \
-  { "no-relocatable",  -MASK_RELOCATABLE },
+  { "no-relocatable",  -MASK_RELOCATABLE },                            \
+  { "traceback",       -MASK_NO_TRACEBACK },                           \
+  { "no-traceback",     MASK_NO_TRACEBACK },
 
 #include "rs6000/powerpc.h"
 
@@ -214,7 +219,8 @@ extern int rs6000_pic_labelno;
     putc (',', FILE);                                                  \
     fprintf (FILE, TYPE_OPERAND_FMT, "function");                      \
     putc ('\n', FILE);                                                 \
-    svr4_traceback (FILE, NAME, DECL);                                 \
+    if (TARGET_TRACEBACK)                                              \
+      svr4_traceback (FILE, NAME, DECL);                               \
     ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                     \
     ASM_OUTPUT_LABEL(FILE, NAME);                                      \
   } while (0)