From 12e19e0588445040f55e4299a69904afd0cd1b22 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 16 Apr 2008 18:01:57 +0200
Subject: [PATCH] re PR c/35739 (ICE with _Decimal128 and va_list)

	PR c/35739
	* tree-nrv.c (tree_nrv): Don't optimize if result_type is GIMPLE
	reg type.

	* gcc.dg/dfp/pr35739.c: New test.

From-SVN: r134351
---
 gcc/ChangeLog                      |  4 ++++
 gcc/testsuite/ChangeLog            |  3 +++
 gcc/testsuite/gcc.dg/dfp/pr35739.c | 16 ++++++++++++++++
 gcc/tree-nrv.c                     |  7 ++++++-
 4 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.dg/dfp/pr35739.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3797049a6f6..57d334c17e0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2008-04-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c/35739
+	* tree-nrv.c (tree_nrv): Don't optimize if result_type is GIMPLE
+	reg type.
+
 	PR tree-optimization/35899
 	* tree-inline.c (expand_call_inline): Use GIMPLE_STMT_OPERAND
 	rather than TREE_OPERAND.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7ba05e88885..85f4cb37bcd 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2008-04-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c/35739
+	* gcc.dg/dfp/pr35739.c: New test.
+
 	PR tree-optimization/35899
 	* gcc.dg/pr35899.c: New test.
 
diff --git a/gcc/testsuite/gcc.dg/dfp/pr35739.c b/gcc/testsuite/gcc.dg/dfp/pr35739.c
new file mode 100644
index 00000000000..d4e1839026e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/dfp/pr35739.c
@@ -0,0 +1,16 @@
+/* PR c/35739 */
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O -fpreprocessed -fmudflap" } */
+
+_Decimal128
+foo (int n, ...)
+{
+  int i;
+  _Decimal128 j = 0;
+  __builtin_va_list ap;
+  __builtin_va_start (ap, n);
+  for (i = 0; i < n; i++)
+    j += __builtin_va_arg (ap, _Decimal128);
+  __builtin_va_end (ap);
+  return j;
+}
diff --git a/gcc/tree-nrv.c b/gcc/tree-nrv.c
index 7330d2896b5..35928ea99e7 100644
--- a/gcc/tree-nrv.c
+++ b/gcc/tree-nrv.c
@@ -1,5 +1,5 @@
 /* Language independent return value optimizations
-   Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -115,6 +115,11 @@ tree_nrv (void)
   if (!aggregate_value_p (result, current_function_decl))
     return 0;
 
+  /* If a GIMPLE type is returned in memory, finalize_nrv_r might create
+     non-GIMPLE.  */
+  if (is_gimple_reg_type (result_type))
+    return 0;
+
   /* Look through each block for assignments to the RESULT_DECL.  */
   FOR_EACH_BB (bb)
     {
-- 
2.30.2