From: Bernd Edlinger <bernd.edlinger@hotmail.de>
Date: Tue, 27 Sep 2016 04:54:49 +0000 (+0000)
Subject: re PR rtl-optimization/77714 (Wrong code generation for gcc.c-torture/execute/pr51447.c)
X-Git-Tag: basepoints/gcc-8~4352
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0fbac2d130600a37414c33ecf2c12c9c8945f353;p=thirdparty%2Fgcc.git

re PR rtl-optimization/77714 (Wrong code generation for gcc.c-torture/execute/pr51447.c)

2016-09-27  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR rlt-optimization/77714
        * lra-eliminations.c (eliminate_regs_in_insn): Avoid alias on
        REG_EQUAL note.

From-SVN: r240518
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3e5b0994eae0..fa647886249b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-09-27  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	PR rlt-optimization/77714
+	* lra-eliminations.c (eliminate_regs_in_insn): Avoid alias on
+	REG_EQUAL note.
+
 2016-09-27  Kugan Vivekanandarajah  <kuganv@linaro.org>
 
 	PR ipa/77677
diff --git a/gcc/lra-eliminations.c b/gcc/lra-eliminations.c
index 1764bd699ce0..03b315e71997 100644
--- a/gcc/lra-eliminations.c
+++ b/gcc/lra-eliminations.c
@@ -981,7 +981,7 @@ eliminate_regs_in_insn (rtx_insn *insn, bool replace_p, bool first_p,
 		      }
 		    lra_update_insn_recog_data (insn);
 		    /* Add offset note for future updates.  */
-		    add_reg_note (insn, REG_EQUAL, src);
+		    add_reg_note (insn, REG_EQUAL, copy_rtx (src));
 		    return;
 		  }
 	      }