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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/52876] [x32] - Sign extend 32 to 64bit then clear upper 32bits fails O1 or higher
Date: Thu, 05 Apr 2012 15:46:00 -0000	[thread overview]
Message-ID: <bug-52876-4-8mTCHZU0o1@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-52876-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52876

--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> 2012-04-05 15:46:02 UTC ---
We shouldn't copy REG_POINTER from SIGN_EXTEND on target with
POINTERS_EXTEND_UNSIGNED > 0.  This patch works for me:

diff --git a/gcc/reginfo.c b/gcc/reginfo.c
index 6353126..77a7e66 100644
--- a/gcc/reginfo.c
+++ b/gcc/reginfo.c
@@ -1225,8 +1225,12 @@ reg_scan_mark_refs (rtx x, rtx insn)
     {
       rtx src = SET_SRC (x);

-      while (GET_CODE (src) == SIGN_EXTEND
-         || GET_CODE (src) == ZERO_EXTEND
+      while (GET_CODE (src) == ZERO_EXTEND
+         || (GET_CODE (src) == SIGN_EXTEND
+#ifdef POINTERS_EXTEND_UNSIGNED
+             && POINTERS_EXTEND_UNSIGNED <= 0
+#endif
+            )
          || GET_CODE (src) == TRUNCATE
          || (GET_CODE (src) == SUBREG && subreg_lowpart_p (src)))
         src = XEXP (src, 0);


  parent reply	other threads:[~2012-04-05 15:46 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-05  8:17 [Bug target/52876] New: " steffen-schmidt at siemens dot com
2012-04-05  8:19 ` [Bug target/52876] " steffen-schmidt at siemens dot com
2012-04-05  8:20 ` steffen-schmidt at siemens dot com
2012-04-05  8:20 ` steffen-schmidt at siemens dot com
2012-04-05  8:21 ` steffen-schmidt at siemens dot com
2012-04-05  8:21 ` steffen-schmidt at siemens dot com
2012-04-05 10:16 ` ubizjak at gmail dot com
2012-04-05 10:17 ` ubizjak at gmail dot com
2012-04-05 13:43 ` hjl.tools at gmail dot com
2012-04-05 13:50 ` hjl.tools at gmail dot com
2012-04-05 14:31 ` hjl.tools at gmail dot com
2012-04-05 15:17 ` [Bug rtl-optimization/52876] " ubizjak at gmail dot com
2012-04-05 15:21 ` [Bug target/52876] " hjl.tools at gmail dot com
2012-04-05 15:46 ` hjl.tools at gmail dot com [this message]
2012-04-10 14:50 ` [Bug rtl-optimization/52876] " hjl.tools at gmail dot com
2012-04-11 19:32 ` hjl at gcc dot gnu.org
2013-02-07 11:50 ` steffen-schmidt at siemens dot com
2013-02-07 16:34 ` hjl.tools at gmail dot com
2024-03-26 23:34 ` pinskia at gcc dot gnu.org

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