re PR target/26775 (a stack pointer is not recovered correctly when using alloca.)

PR target/26775
PR target/26776
* config/m32r/m32r.c (m32r_output_function_epilogue): Case for a large stack
  frame at epilogue. Use fp to recover a stack pointer for alloca function
  at epilogue.

From-SVN: r112660

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ed158a156beada3d0d720dc67b6ff05ab1adfec4..e660b38d0c0425515d7d42804159165e43faeb4c 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2006-04-04  Kazuhiro Inaoka <inaoka.kazuhiro@renesas.com>
+
+       PR target/26775
+       PR target/26776
+       * config/m32r/m32r.c (m32r_output_function_epilogue): Case for
+       a large stack frame at epilogue. Use fp to recover a stack
+       pointer for alloca function at epilogue.
+
 2006-03-05  Release Manager
 
        * GCC 3.4.6 released.

diff --git a/gcc/config/m32r/m32r.c b/gcc/config/m32r/m32r.c
index c28140b246bc06a0a34f4b6f9301a5663657d5c1..5609b0487cc9e51d6034717f2613279d4c1b359e 100644 (file)
--- a/gcc/config/m32r/m32r.c
+++ b/gcc/config/m32r/m32r.c
@@ -2087,11 +2087,19 @@ m32r_output_function_epilogue (FILE * file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
          else if (reg_offset < 32768)
            fprintf (file, "\tadd3 %s,%s,%s%d\n",
                     sp_str, sp_str, IMMEDIATE_PREFIX, reg_offset);
-         else
+         else if (reg_offset <= 0xffffff)
            fprintf (file, "\tld24 %s,%s%d\n\tadd %s,%s\n",
                     reg_names[PROLOGUE_TMP_REGNUM],
                     IMMEDIATE_PREFIX, reg_offset,
                     sp_str, reg_names[PROLOGUE_TMP_REGNUM]);
+         else
+           fprintf (file, "\tseth %s,%shigh(%d)\n\tor3 %s,%s,%slow(%d)\n\tadd %s,%s\n",
+                    reg_names[PROLOGUE_TMP_REGNUM],
+                    IMMEDIATE_PREFIX, reg_offset,
+                    reg_names[PROLOGUE_TMP_REGNUM],
+                    reg_names[PROLOGUE_TMP_REGNUM],
+                    IMMEDIATE_PREFIX, reg_offset,
+                    sp_str, reg_names[PROLOGUE_TMP_REGNUM]);
        }
       else if (frame_pointer_needed)
        {
@@ -2102,10 +2110,20 @@ m32r_output_function_epilogue (FILE * file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
          else if (reg_offset < 32768)
            fprintf (file, "\tadd3 %s,%s,%s%d\n",
                     sp_str, fp_str, IMMEDIATE_PREFIX, reg_offset);
+         else if (reg_offset <= 0xffffff)
+           fprintf (file, "\tld24 %s,%s%d\n\tadd %s,%s\n\tmv %s,%s\n",
+                    reg_names[PROLOGUE_TMP_REGNUM],
+                    IMMEDIATE_PREFIX, reg_offset,
+                    reg_names[PROLOGUE_TMP_REGNUM], fp_str,
+                    sp_str, reg_names[PROLOGUE_TMP_REGNUM]);
          else
-           fprintf (file, "\tld24 %s,%s%d\n\tadd %s,%s\n",
+           fprintf (file, "\tseth %s,%shigh(%d)\nor3 %s,%s,%slow(%d)\n\tadd %s,%s\n\tmv %s,%s\n",
+                    reg_names[PROLOGUE_TMP_REGNUM],
+                    IMMEDIATE_PREFIX, reg_offset,
+                    reg_names[PROLOGUE_TMP_REGNUM],
                     reg_names[PROLOGUE_TMP_REGNUM],
                     IMMEDIATE_PREFIX, reg_offset,
+                    reg_names[PROLOGUE_TMP_REGNUM], fp_str,
                     sp_str, reg_names[PROLOGUE_TMP_REGNUM]);
        }
       else
@@ -2127,8 +2145,26 @@ m32r_output_function_epilogue (FILE * file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
 
       /* Remove varargs area if present.  */
       if (current_frame_info.pretend_size != 0)
-       fprintf (file, "\taddi %s,%s%d\n",
-                sp_str, IMMEDIATE_PREFIX, current_frame_info.pretend_size);
+        if (current_frame_info.pretend_size < 128)
+         fprintf (file, "\taddi %s,%s%d\n",
+                    sp_str, IMMEDIATE_PREFIX, current_frame_info.pretend_size);
+        else if (current_frame_info.pretend_size < 32768)
+         fprintf (file, "\tadd3 %s,%s,%s%d\n",
+                  sp_str, sp_str, IMMEDIATE_PREFIX,
+                  current_frame_info.pretend_size);
+        else if (current_frame_info.pretend_size <= 0xffffff)
+         fprintf (file, "\tld24 %s,%s%d\n\tadd %s,%s\n",
+                  reg_names[PROLOGUE_TMP_REGNUM],
+                  IMMEDIATE_PREFIX, current_frame_info.pretend_size,
+                  sp_str, reg_names[PROLOGUE_TMP_REGNUM]);
+        else
+         fprintf (file, "\tseth %s,%shigh(%d)\n\tor3 %s,%s,%slow(%d)\n\tadd %s,%s\n",
+                  reg_names[PROLOGUE_TMP_REGNUM],
+                  IMMEDIATE_PREFIX, current_frame_info.pretend_size,
+                  reg_names[PROLOGUE_TMP_REGNUM],
+                  reg_names[PROLOGUE_TMP_REGNUM],
+                  IMMEDIATE_PREFIX, current_frame_info.pretend_size,
+                  sp_str, reg_names[PROLOGUE_TMP_REGNUM]);
        
       /* Emit the return instruction.  */
       if (M32R_INTERRUPT_P (fn_type))