Fix MIPS SPEC95 FP 146.wave5 -fprofile-generate failure.

PR target/16325
* config/mips/mips.h (STARTING_FRAME_OFFSET): When flag_profile_value
and ! TARGET_64BIT, include REG_PARM_STACK_SPACE.
* gcc.dg/profile-generate-1.c: New.

From-SVN: r84727

gcc/ChangeLog

+2004-07-14  James E Wilson  <wilson@specifixinc.com>
+
+	PR target/16325
+	* config/mips/mips.h (STARTING_FRAME_OFFSET): When flag_profile_value
+	and ! TARGET_64BIT, include REG_PARM_STACK_SPACE.
+
 2004-07-15  Jakub Jelinek  <jakub@redhat.com>
 
 	* expr.c (expand_assignment): Reenable bitfield += optimizations.

gcc/config/mips/mips.h

@@ -2132,9 +2132,21 @@ extern enum reg_class mips_char_to_class[256];
 #define STACK_GROWS_DOWNWARD
 
 /* The offset of the first local variable from the beginning of the frame.
-   See compute_frame_size for details about the frame layout.  */
+   See compute_frame_size for details about the frame layout.
+
+   ??? If flag_profile_values is true, and we are generating 32-bit code, then
+   we assume that we will need 16 bytes of argument space.  This is because
+   the value profiling code may emit calls to cmpdi2 in leaf functions.
+   Without this hack, the local variables will start at sp+8 and the gp save
+   area will be at sp+16, and thus they will overlap.  compute_frame_size is
+   OK because it uses STARTING_FRAME_OFFSET to compute cprestore_size, which
+   will end up as 24 instead of 8.  This won't be needed if profiling code is
+   inserted before virtual register instantiation.  */
+
 #define STARTING_FRAME_OFFSET						\
-  (current_function_outgoing_args_size					\
+  ((flag_profile_values && ! TARGET_64BIT				\
+    ? MAX (REG_PARM_STACK_SPACE(NULL), current_function_outgoing_args_size) \
+    : current_function_outgoing_args_size)				\
    + (TARGET_ABICALLS && !TARGET_NEWABI					\
       ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
 

gcc/testsuite/ChangeLog

+2004-07-14  James E Wilson  <wilson@specifixinc.com>
+
+	PR target/16325
+	* gcc.dg/profile-generate-1.c: New.
+
 2004-07-15  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.c-torture/execute/20040709-1.c: New test.

gcc/testsuite/gcc.dg/profile-generate-1.c

+/* Bug 16325.  */
+/* { dg-options "-O -fprofile-generate" } */
+
+int *p1;
+int *p2;
+int *p3;
+
+int ga = 100;
+
+int
+sub (int i, int j)
+{
+  int k;
+  int l;
+  int m;
+  int n;
+  p1 = &k;
+  p2 = &l;
+  p3 = &m;
+  k = 20;
+  l = 30;
+  m = 40;
+  n = i / j;
+  return n + ga;
+}
+
+int
+main(void)
+{
+  if (sub (99, 33) != 103)
+    abort ();
+  return 0;
+}