* df.c (df_uses_record) <MEM>: The argument of a MEM is read-only,

	never read-write.
	<REG>: Delete incorrect comment.
	<SET>: Remove 'use_flags' variable.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@74221 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 26349e4..1ea9b2c 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2003-12-02  Geoffrey Keating  <geoffk@geoffk.org>
+
+       * df.c (df_uses_record) <MEM>: The argument of a MEM is read-only,
+       never read-write.
+       <REG>: Delete incorrect comment.
+       <SET>: Remove 'use_flags' variable.
+
 2003-12-03  David Edelsohn  <edelsohn@gnu.org>
 
        * function.c (assign_parms): Make sure parm PARALLEL combined

diff --git a/gcc/df.c b/gcc/df.c
index ae99d8e..e061fae 100644 (file)
--- a/gcc/df.c
+++ b/gcc/df.c
@@ -971,7 +971,7 @@ df_uses_record (struct df *df, rtx *loc, enum df_ref_type ref_type,
       return;
 
     case MEM:
-      df_uses_record (df, &XEXP (x, 0), DF_REF_REG_MEM_LOAD, bb, insn, flags);
+      df_uses_record (df, &XEXP (x, 0), DF_REF_REG_MEM_LOAD, bb, insn, 0);
       return;
 
     case SUBREG:
@@ -987,7 +987,6 @@ df_uses_record (struct df *df, rtx *loc, enum df_ref_type ref_type,
       /* ... Fall through ...  */
 
     case REG:
-      /* See a REG (or SUBREG) other than being set.  */
       df_ref_record (df, x, loc, insn, ref_type, flags);
       return;
 
@@ -999,14 +998,12 @@ df_uses_record (struct df *df, rtx *loc, enum df_ref_type ref_type,
 
        switch (GET_CODE (dst))
          {
-           enum df_ref_flags use_flags;
            case SUBREG:
              if ((df->flags & DF_FOR_REGALLOC) == 0
                   && read_modify_subreg_p (dst))
                {
-                 use_flags = DF_REF_READ_WRITE;
                  df_uses_record (df, &SUBREG_REG (dst), DF_REF_REG_USE, bb,
-                                 insn, use_flags);
+                                 insn, DF_REF_READ_WRITE);
                  break;
                }
              /* ... FALLTHRU ...  */
@@ -1025,9 +1022,8 @@ df_uses_record (struct df *df, rtx *loc, enum df_ref_type ref_type,
              dst = XEXP (dst, 0);
              if (GET_CODE (dst) != SUBREG)
                abort ();
-             use_flags = DF_REF_READ_WRITE;
              df_uses_record (df, &SUBREG_REG (dst), DF_REF_REG_USE, bb,
-                            insn, use_flags);
+                            insn, DF_REF_READ_WRITE);
              break;
            case ZERO_EXTRACT:
            case SIGN_EXTRACT: