* reload1.c (eliminate_regs_in_insn): Don't restore an operand

	if doing so would replace the entire pattern.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158188 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5b2f0f0..ed09c30 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -9,6 +9,9 @@
        (web_main): Call it.
        (union_defs): Don't try to recognize match_dups.
 
+       * reload1.c (eliminate_regs_in_insn): Don't restore an operand
+       if doing so would replace the entire pattern.
+
 2010-04-09  Uros Bizjak  <ubizjak@gmail.com>
 
        PR target/43707

diff --git a/gcc/reload1.c b/gcc/reload1.c
index 02fef2d..bd590cb 100644 (file)
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -3557,7 +3557,10 @@ eliminate_regs_in_insn (rtx insn, int replace)
     {
       /* Restore the old body.  */
       for (i = 0; i < recog_data.n_operands; i++)
-       *recog_data.operand_loc[i] = orig_operand[i];
+       /* Restoring a top-level match_parallel would clobber the new_body
+          we installed in the insn.  */
+       if (recog_data.operand_loc[i] != &PATTERN (insn))
+         *recog_data.operand_loc[i] = orig_operand[i];
       for (i = 0; i < recog_data.n_dups; i++)
        *recog_data.dup_loc[i] = orig_operand[(int) recog_data.dup_num[i]];
     }