Fix prologue/epilogue generation for ARM ISR routines.

Add test case to catch bugs reported in prologue/epilogue generation for ARM ISR routines.

From-SVN: r48210

2 files changed, 75 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.misc-tests/arm-isr.c b/gcc/testsuite/gcc.misc-tests/arm-isr.c
new file mode 100644
index 0000000..f79e241
--- /dev/null
+++ b/gcc/testsuite/gcc.misc-tests/arm-isr.c
@@ -0,0 +1,48 @@
+#ifndef __thumb__
+/* There used to be a couple of bugs in the ARM's prologue and epilogue
+   generation for ISR routines.  The wrong epilogue instruction would be
+   generated to restore the IP register if it had to be pushed onto the
+   stack, and the wrong offset was being computed for local variables if
+   r0 - r3 had to be saved.  This tests for both of these cases.  */
+
+int z = 9;
+
+int
+bar (void)
+{
+  return z;
+}
+
+int
+foo (int a, int b, int c, int d, int e, int f, int g, int h)
+{
+  volatile int i = (a + b) - (g + h) + bar ();
+  volatile int j = (e + f) - (c + d);
+
+  return a + b + c + d + e + f + g + h + i + j;
+}
+
+int foo1 (int a, int b, int c, int d, int e, int f, int g, int h) __attribute__ ((interrupt ("IRQ")));
+
+int
+foo1 (int a, int b, int c, int d, int e, int f, int g, int h)
+{
+  volatile int i = (a + b) - (g + h) + bar ();
+  volatile int j = (e + f) - (c + d);
+
+  return a + b + c + d + e + f + g + h + i + j;
+}
+#endif
+
+int
+main (void)
+{
+#ifndef __thumb__
+  if (foo (1, 2, 3, 4, 5, 6, 7, 8) != 32)
+    abort ();
+    
+  if (foo1 (1, 2, 3, 4, 5, 6, 7, 8) != 32)
+    abort ();
+#endif
+  exit (0);
+}
diff --git a/gcc/testsuite/gcc.misc-tests/arm-isr.exp b/gcc/testsuite/gcc.misc-tests/arm-isr.exp
new file mode 100644
index 0000000..9d4a1b5
--- /dev/null
+++ b/gcc/testsuite/gcc.misc-tests/arm-isr.exp
@@ -0,0 +1,27 @@
+#   Copyright (C) 2001 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+
+# This file is based on a bug report submitted to gcc-bugs:
+
+# Load support procs.
+load_lib gcc-dg.exp
+
+dg-init
+if {[istarget "*arm-*-*"] || [istarget "xscale-*-*"]} {
+  dg-runtest "$srcdir/$subdir/arm-isr.c" "" ""
+}
+dg-finish
+