From: Kaz Kojima <kkojima@gcc.gnu.org>
Date: Wed, 1 Jun 2011 22:36:08 +0000 (+0000)
Subject: sh.c (expand_cbranchdi4): Use a scratch register if needed when original operands... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e95873dd5bbab240f64c4ab8138646ead2e3bdfc;p=gcc.git

sh.c (expand_cbranchdi4): Use a scratch register if needed when original operands are used for msw_skip...

	* config/sh/sh.c (expand_cbranchdi4): Use a scratch register if
	needed when original operands are used for msw_skip comparison.
	* gcc.c-torture/compile/pr49238.c: New.

From-SVN: r174550
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6483324ca94..9b9fc4179db 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-06-01  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/49238
+	* config/sh/sh.c (expand_cbranchdi4): Use a scratch register if
+	needed when original operands are used for msw_skip comparison.
+
 2011-06-01  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/49250
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index fb204c648e9..c5fbd569602 100644
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -2199,6 +2199,13 @@ expand_cbranchdi4 (rtx *operands, enum rtx_code comparison)
 	{
 	  operands[1] = op1h;
 	  operands[2] = op2h;
+	  if (reload_completed
+	      && ! arith_reg_or_0_operand (op2h, SImode)
+	      && (true_regnum (op1h) || (comparison != EQ && comparison != NE)))
+	    {
+	      emit_move_insn (scratch, operands[2]);
+	      operands[2] = scratch;
+	    }
 	}
 
       operands[3] = skip_label = gen_label_rtx ();
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 37a1dc64bf6..a611a29f406 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2011-06-01  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/49238
+	* gcc.c-torture/compile/pr49238.c: New.
+
 2011-06-01  Sofiane Naci  <sofiane.naci@arm.com>
 
 	* gcc.target/arm/g2.c: Skip test in -mthumb.
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr49238.c b/gcc/testsuite/gcc.c-torture/compile/pr49238.c
new file mode 100644
index 00000000000..fd8443a8f08
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr49238.c
@@ -0,0 +1,18 @@
+/* PR target/49238 */
+extern int bar (void);
+
+void
+foo (unsigned long long a, int b)
+{
+  int i;
+
+  if (b)
+    for (a = -12; a >= 10; a = bar ())
+      break;
+  else
+    return;
+
+  for (i = 0; i < 10; i += 10)
+    if ((i == bar ()) | (bar () >= a))
+      bar ();
+}