1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/attr-isr-nosave_low_regs.c b/gcc/testsuite/gcc.dg/attr-isr-nosave_low_regs.c
new file mode 100644
index 000000000..3bda1014c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/attr-isr-nosave_low_regs.c
@@ -0,0 +1,28 @@
+/* { dg-do compile { target { { sh-*-* sh[1234ble]*-*-* } && nonpic } } } */
+/* { dg-options "-O" } */
+
+extern void bar ();
+
+void foo ()
+{
+}
+
+#pragma interrupt
+void ( __attribute__ ((nosave_low_regs)) isr) ()
+{
+  bar ();
+}
+
+void delay(int a)
+{
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */
+/* A call will clobber all call-saved registers, but because of
+   #pragma nosave_low_regs, r0..r7 need not be saved/restored.
+   One of these registers will also do fine to hold the function address.
+   Call-saved registers r8..r13 also don't need to be restored.  */
+/* { dg-final { scan-assembler-not "\[^f\]r\[0-9\]\[ \t\]*," } } */
+/* { dg-final { scan-assembler-not "\[^f\]r\[89\]" } } */
+/* { dg-final { scan-assembler-not "\[^f\]r1\[,0-3\]" } } */
+/* { dg-final { scan-assembler-times "macl" 2} } */