How to run group of selective test cases in gcc test suite

[gnu_user]

Hi All,

I am uable to run a selective set of tests in gcc-4.5.1 test suite which
uses dejagnu framework.
I tried two runtest commands given below (output is also given below).
Can you please guide me how to run specific set of tests for example say i
would like to run only tests gcc.target/i386/avx-vaddpd-1.c and
gcc.target/i386/avx-vaddpd-256-1.c ?


Command-1:This command runs 10 tests but does not run one the i mentioned
gcc.target/i386/avx-vaddpd-1.c 
$ cd gcc/testsuite
$ runtest -tool_exec gcc --src-dir=. --tool gcc
i386.exp=gcc.target/i386/avx-vaddpd-1.c
Output:
        WARNING: Couldn't find the global config file.
        Test Run By root on Tue Jan 25 21:05:23 2011
        Native configuration is x86_64-unknown-linux-gnu

                        === gcc tests ===

        Schedule of variations:
            unix

        Running target unix
        Using /usr/local/share/dejagnu/baseboards/unix.exp as board description
file for target.
        Using /usr/local/share/dejagnu/config/unix.exp as generic interface file
for target.
        Using ./config/default.exp as tool-and-target-specific interface file.
        Running ./gcc.target/i386/i386.exp ...

                        === gcc Summary ===

        # of expected passes            10
        /home/ganesh/gcc_test-suite/install_4_5_1/bin/gcc  version 4.5.1 (GCC)
        
Command-2:This command runs all tests under i386 folder 
        $ runtest -tool_exec gcc
--src-dir=/home/ganesh/Intel-SDE/gcc_test-suite/try-using-make/for_searching/gcc-4.5.1/gcc/testsuite
--tool gcc gcc.target/i386/i386.exp=gcc.target/i386/avx-vaddpd-1.c


-Thanks and regards
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