Fix nit

[pf3gnuchains/gcc-fork.git] / gcc / jump.c

diff --git a/gcc/jump.c b/gcc/jump.c
index 28a9b0f..c95c211 100644 (file)
--- a/gcc/jump.c
+++ b/gcc/jump.c
@@ -68,6 +68,7 @@ along with GCC; see the file COPYING3.  If not see
 static void init_label_info (rtx);
 static void mark_all_labels (rtx);
 static void mark_jump_label_1 (rtx, rtx, bool, bool);
+static void mark_jump_label_asm (rtx, rtx);
 static void redirect_exp_1 (rtx *, rtx, rtx, rtx);
 static int invert_exp_1 (rtx, rtx);
 static int returnjump_p_1 (rtx *, void *);
@@ -232,7 +233,7 @@ mark_all_labels (rtx f)
                            && (rtx_equal_p (label_dest, XEXP (pc_src, 1))
                                || rtx_equal_p (label_dest,
                                                XEXP (pc_src, 2))))))
-                               
+
                  {
                    /* The CODE_LABEL referred to in the note must be the
                       CODE_LABEL in the LABEL_REF of the "set".  We can
@@ -1006,8 +1007,12 @@ sets_cc0_p (const_rtx x)
 void
 mark_jump_label (rtx x, rtx insn, int in_mem)
 {
-  mark_jump_label_1 (x, insn, in_mem != 0,
-                    (insn != NULL && x == PATTERN (insn) && JUMP_P (insn)));
+  rtx asmop = extract_asm_operands (x);
+  if (asmop)
+    mark_jump_label_asm (asmop, insn);
+  else
+    mark_jump_label_1 (x, insn, in_mem != 0,
+                      (insn != NULL && x == PATTERN (insn) && JUMP_P (insn)));
 }
 
 /* Worker function for mark_jump_label.  IN_MEM is TRUE when X occurs
@@ -1145,6 +1150,22 @@ mark_jump_label_1 (rtx x, rtx insn, bool in_mem, bool is_target)
     }
 }
 
+/* Worker function for mark_jump_label.  Handle asm insns specially.
+   In particular, output operands need not be considered so we can
+   avoid re-scanning the replicated asm_operand.  Also, the asm_labels
+   need to be considered targets.  */
+
+static void
+mark_jump_label_asm (rtx asmop, rtx insn)
+{
+  int i;
+
+  for (i = ASM_OPERANDS_INPUT_LENGTH (asmop) - 1; i >= 0; --i)
+    mark_jump_label_1 (ASM_OPERANDS_INPUT (asmop, i), insn, false, false);
+
+  for (i = ASM_OPERANDS_LABEL_LENGTH (asmop) - 1; i >= 0; --i)
+    mark_jump_label_1 (ASM_OPERANDS_LABEL (asmop, i), insn, false, true);
+}
 \f
 /* Delete insn INSN from the chain of insns and update label ref counts
    and delete insns now unreachable.
@@ -1386,9 +1407,17 @@ int
 redirect_jump_1 (rtx jump, rtx nlabel)
 {
   int ochanges = num_validated_changes ();
-  rtx *loc;
+  rtx *loc, asmop;
 
-  if (GET_CODE (PATTERN (jump)) == PARALLEL)
+  asmop = extract_asm_operands (PATTERN (jump));
+  if (asmop)
+    {
+      if (nlabel == NULL)
+       return 0;
+      gcc_assert (ASM_OPERANDS_LABEL_LENGTH (asmop) == 1);
+      loc = &ASM_OPERANDS_LABEL (asmop, 0);
+    }
+  else if (GET_CODE (PATTERN (jump)) == PARALLEL)
     loc = &XVECEXP (PATTERN (jump), 0, 0);
   else
     loc = &PATTERN (jump);
@@ -1423,7 +1452,7 @@ redirect_jump (rtx jump, rtx nlabel, int delete_unused)
 }
 
 /* Fix up JUMP_LABEL and label ref counts after OLABEL has been replaced with
-   NLABEL in JUMP.  
+   NLABEL in JUMP.
    If DELETE_UNUSED is positive, delete related insn to OLABEL if its ref
    count has dropped to zero.  */
 void
@@ -1514,10 +1543,11 @@ invert_jump_1 (rtx jump, rtx nlabel)
   int ok;
 
   ochanges = num_validated_changes ();
-  gcc_assert (x);
+  if (x == NULL)
+    return 0;
   ok = invert_exp_1 (SET_SRC (x), jump);
   gcc_assert (ok);
-  
+
   if (num_validated_changes () == ochanges)
     return 0;
 
@@ -1665,6 +1695,10 @@ rtx_renumbered_equal_p (const_rtx x, const_rtx y)
   if (GET_MODE (x) != GET_MODE (y))
     return 0;
 
+  /* MEMs refering to different address space are not equivalent.  */
+  if (code == MEM && MEM_ADDR_SPACE (x) != MEM_ADDR_SPACE (y))
+    return 0;
+
   /* For commutative operations, the RTX match if the operand match in any
      order.  Also handle the simple binary and unary cases without a loop.  */
   if (targetm.commutative_p (x, UNKNOWN))