From: H.J. Lu <hongjiu.lu@intel.com>
Date: Fri, 19 Dec 2014 19:19:33 +0000 (+0000)
Subject: Pass unpromoted argument to promote_function_mode
X-Git-Tag: releases/gcc-4.8.5~363
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=118eeb312b17e24f3ed76601d5a94d206c7509d6;p=thirdparty%2Fgcc.git

Pass unpromoted argument to promote_function_mode

This patch updates setup_incoming_promotions in combine.c to match what
is actually passed in assign_parm_setup_reg in function.c.

Backported from mainline:

gcc/

	PR rtl-optimization/64037
	* combine.c (setup_incoming_promotions): Pass the argument
	before any promotions happen to promote_function_mode.

gcc/testsuite/

	PR rtl-optimization/64037
	* g++.dg/pr64037.C: New test.

From-SVN: r218967
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d44f04580625..31cafd547818 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2014-12-19  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backported from mainline
+	2014-12-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR rtl-optimization/64037
+	* combine.c (setup_incoming_promotions): Pass the argument
+	before any promotions happen to promote_function_mode.
+
 2014-12-19  Jakub Jelinek  <jakub@redhat.com>
 
 	* BASE-VER: Set to 4.8.5.
diff --git a/gcc/combine.c b/gcc/combine.c
index 0cdd37b9465f..7c84a3d65592 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -1527,8 +1527,8 @@ setup_incoming_promotions (rtx first)
       uns3 = TYPE_UNSIGNED (DECL_ARG_TYPE (arg));
 
       /* The mode and signedness of the argument as it is actually passed,
-         after any TARGET_PROMOTE_FUNCTION_ARGS-driven ABI promotions.  */
-      mode3 = promote_function_mode (DECL_ARG_TYPE (arg), mode2, &uns3,
+         see assign_parm_setup_reg in function.c.  */
+      mode3 = promote_function_mode (TREE_TYPE (arg), mode1, &uns3,
 				     TREE_TYPE (cfun->decl), 0);
 
       /* The mode of the register in which the argument is being passed.  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9e3e281c782c..64e6e07eb56f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2014-12-19  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backported from mainline
+	2014-12-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR rtl-optimization/64037
+	* g++.dg/pr64037.C: New test.
+
 2014-12-19  Release Manager
 
 	* GCC 4.8.4 released.
diff --git a/gcc/testsuite/g++.dg/pr64037.C b/gcc/testsuite/g++.dg/pr64037.C
new file mode 100644
index 000000000000..e5cd0e2ee178
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr64037.C
@@ -0,0 +1,27 @@
+// { dg-do run { target i?86-*-* x86_64-*-* } }
+// { dg-options "-std=c++11 -Os" }
+
+enum class X : unsigned char {
+  V = 2,
+};
+
+static void
+__attribute__((noinline,noclone))
+foo(unsigned &out, unsigned a, X b)
+{
+  out = static_cast<unsigned>(b);
+}
+
+int main()
+{
+  unsigned deadbeef = 0xDEADBEEF;
+  asm volatile ("" : "+d" (deadbeef), "+c" (deadbeef));
+
+  unsigned out;
+  foo(out, 2, X::V);
+
+  if (out != 2)
+    __builtin_abort ();
+
+  return 0;
+}