From: Richard Kenner <kenner@gcc.gnu.org>
Date: Thu, 16 Jun 1994 22:54:00 +0000 (-0400)
Subject: (reload_reg_free_p, case RELOAD_OTHER): Allowed to conflict with
X-Git-Tag: misc/cutover-egcs-0~6438
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=224f1d7123164a8c7ed9f313320b464c468b8b18;p=thirdparty%2Fgcc.git

(reload_reg_free_p, case RELOAD_OTHER): Allowed to conflict with
RELOAD_FOR_OTHER_ADDRESS.

From-SVN: r7505
---

diff --git a/gcc/reload1.c b/gcc/reload1.c
index 6de6b1d4ff05..11e0a1bf4a66 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -4156,10 +4156,22 @@ reload_reg_free_p (regno, opnum, type)
   switch (type)
     {
     case RELOAD_OTHER:
-      /* In use for anything means not available for a RELOAD_OTHER.  */
-      return ! TEST_HARD_REG_BIT (reload_reg_used_at_all, regno);
+      /* In use for anything except RELOAD_FOR_OTHER_ADDRESS means
+	 we can't use it for RELOAD_OTHER.  */
+      if (TEST_HARD_REG_BIT (reload_reg_used, regno)
+	  || TEST_HARD_REG_BIT (reload_reg_used_in_op_addr, regno)
+	  || TEST_HARD_REG_BIT (reload_reg_used_in_insn, regno))
+	return 0;
+
+      for (i = 0; i < reload_n_operands; i++)
+	if (TEST_HARD_REG_BIT (reload_reg_used_in_input_addr[i], regno)
+	    || TEST_HARD_REG_BIT (reload_reg_used_in_output_addr[i], regno)
+	    || TEST_HARD_REG_BIT (reload_reg_used_in_input[i], regno)
+	    || TEST_HARD_REG_BIT (reload_reg_used_in_output[i], regno))
+	  return 0;
+
+      return 1;
 
-      /* The other kinds of use can sometimes share a register.  */
     case RELOAD_FOR_INPUT:
       if (TEST_HARD_REG_BIT (reload_reg_used_in_insn, regno)
 	  || TEST_HARD_REG_BIT (reload_reg_used_in_op_addr, regno))