From: Segher Boessenkool <segher@kernel.crashing.org>
Date: Sat, 15 Dec 2018 12:07:42 +0000 (+0100)
Subject: backport: re PR rtl-optimization/88001 (ASMCONS cannot handle properly UNSPEC(CONST))
X-Git-Tag: releases/gcc-7.5.0~721
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f3654355b5e502132b647da93c6d7f6c9b3545e3;p=thirdparty%2Fgcc.git

backport: re PR rtl-optimization/88001 (ASMCONS cannot handle properly UNSPEC(CONST))

	Backport from trunk
	2018-12-14  Segher Boessenkool  <segher@kernel.crashing.org>

	PR rtl-optimization/88001
	* function.c (match_asm_constraints_1): Don't invalidly share RTL.

From-SVN: r267172
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1adedcc527ce..fc096324ec29 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2018-12-15  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	Backport from trunk
+	2018-12-14  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	PR rtl-optimization/88001
+	* function.c (match_asm_constraints_1): Don't invalidly share RTL.
+
 2018-12-13  Andreas Krebbel  <krebbel@linux.ibm.com>
 
 	Backport from mainline
diff --git a/gcc/function.c b/gcc/function.c
index bde4da073c28..7df51f29fd86 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -6604,7 +6604,7 @@ match_asm_constraints_1 (rtx_insn *insn, rtx *p_sets, int noutputs)
       output_matched[match] = true;
 
       start_sequence ();
-      emit_move_insn (output, input);
+      emit_move_insn (output, copy_rtx (input));
       insns = get_insns ();
       end_sequence ();
       emit_insn_before (insns, insn);