From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 25 Apr 2018 13:10:01 +0000 (+0200)
Subject: re PR middle-end/85414 (ICE: in ix86_expand_prologue, at config/i386/i386.c:13810... 
X-Git-Tag: upstream/12.2.0~32182
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b15b6fc56478c6243e5776d04c23565ebba87e68;p=platform%2Fupstream%2Fgcc.git

re PR middle-end/85414 (ICE: in ix86_expand_prologue, at config/i386/i386.c:13810 with -Og -fgcse)

	PR middle-end/85414
	* simplify-rtx.c (simplify_unary_operation_1) <case SIGN_EXTEND,
	case ZERO_EXTEND>: Pass SUBREG_REG (op) rather than op to
	gen_lowpart_no_emit.

From-SVN: r259649
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e65ab7b..e2f6e9c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2018-04-25  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/85414
+	* simplify-rtx.c (simplify_unary_operation_1) <case SIGN_EXTEND,
+	case ZERO_EXTEND>: Pass SUBREG_REG (op) rather than op to
+	gen_lowpart_no_emit.
+
 2018-04-25  Sebastian Peryt  <sebastian.peryt@intel.com>
 
 	PR target/85473
diff --git a/gcc/expr.c b/gcc/expr.c
index c9e6bf2..9dd0e60 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -233,7 +233,10 @@ convert_move (rtx to, rtx from, int unsignedp)
       && (GET_MODE_PRECISION (subreg_promoted_mode (from))
 	  >= GET_MODE_PRECISION (to_int_mode))
       && SUBREG_CHECK_PROMOTED_SIGN (from, unsignedp))
-    from = gen_lowpart (to_int_mode, from), from_mode = to_int_mode;
+    {
+      from = gen_lowpart (to_int_mode, SUBREG_REG (from));
+      from_mode = to_int_mode;
+    }
 
   gcc_assert (GET_CODE (to) != SUBREG || !SUBREG_PROMOTED_VAR_P (to));
 
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index 9ce180d..e96c9d1 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -1484,7 +1484,7 @@ simplify_unary_operation_1 (enum rtx_code code, machine_mode mode, rtx op)
 	  && SUBREG_PROMOTED_SIGNED_P (op)
 	  && !paradoxical_subreg_p (mode, GET_MODE (SUBREG_REG (op))))
 	{
-	  temp = rtl_hooks.gen_lowpart_no_emit (mode, op);
+	  temp = rtl_hooks.gen_lowpart_no_emit (mode, SUBREG_REG (op));
 	  if (temp)
 	    return temp;
 	}
@@ -1567,7 +1567,7 @@ simplify_unary_operation_1 (enum rtx_code code, machine_mode mode, rtx op)
 	  && SUBREG_PROMOTED_UNSIGNED_P (op)
 	  && !paradoxical_subreg_p (mode, GET_MODE (SUBREG_REG (op))))
 	{
-	  temp = rtl_hooks.gen_lowpart_no_emit (mode, op);
+	  temp = rtl_hooks.gen_lowpart_no_emit (mode, SUBREG_REG (op));
 	  if (temp)
 	    return temp;
 	}