[PATCH, testsuite] MIPS: Add isa>=2 option to interrupt_handler-bug-1.c.

[Toma Tabacu]

Hi,

Currently, the interrupt_handler-bug-1.c test will fail on pre-R2 targets
because the "interrupt" function attribute requires at least an R2 target and
the test does not enforce this requirement.

This patch fixes this by adding the isa_rev>=2 option to the test's dg-options.

Tested with mips-mti-elf.

Regards,
Toma Tabacu

gcc/testsuite/ChangeLog:

2016-11-21  Toma Tabacu  <toma.tab...@imgtec.com>

        * gcc.target/mips/interrupt_handler-bug-1.c (dg-options): Add
        isa_rev>=2.

diff --git a/gcc/testsuite/gcc.target/mips/interrupt_handler-bug-1.c 
b/gcc/testsuite/gcc.target/mips/interrupt_handler-bug-1.c
index 2784705..083e152 100644
--- a/gcc/testsuite/gcc.target/mips/interrupt_handler-bug-1.c
+++ b/gcc/testsuite/gcc.target/mips/interrupt_handler-bug-1.c
@@ -1,4 +1,4 @@
-/* { dg-options "-funroll-loops" } */
+/* { dg-options "-funroll-loops isa_rev>=2" } */
 int foo;
 int bar;