From: Vladimir Makarov <vmakarov@redhat.com>
Date: Fri, 17 Feb 2017 16:10:59 +0000 (+0000)
Subject: re PR rtl-optimization/79541 (lra reads uninitialized memory (with invalid input))
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8b4aea7364cbb2e82e0e46810c6a99bf001ff25b;p=gcc.git

re PR rtl-optimization/79541 (lra reads uninitialized memory (with invalid input))

2017-02-17  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/79541
	* lra-constraints.c (curr_insn_transform): Remove wrong asm insn
	instead of transforming it into USE.

From-SVN: r245536
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0339ac9c5d3..d4a0c0def35 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2017-02-17  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/79541
+	* lra-constraints.c (curr_insn_transform): Remove wrong asm insn
+	instead of transforming it into USE.
+
 2017-02-17  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* config/rs6000/rs6000.md (extendsfdf2): Remove default arguments.
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index 585ca841aee..0098a7585e8 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -3773,9 +3773,9 @@ curr_insn_transform (bool check_only_p)
 	fatal_insn ("unable to generate reloads for:", curr_insn);
       error_for_asm (curr_insn,
 		     "inconsistent operand constraints in an %<asm%>");
-      /* Avoid further trouble with this insn.	*/
-      PATTERN (curr_insn) = gen_rtx_USE (VOIDmode, const0_rtx);
-      lra_invalidate_insn_data (curr_insn);
+      /* Avoid further trouble with this insn.  Don't generate use
+	 pattern here as we could use the insn SP offset.  */
+      lra_set_insn_deleted (curr_insn);
       return true;
     }