[PATCH, libgomp]: Cleanup test files in testsuite/libgomp.c directory

[Uros Bizjak]

Hello!

The motivation for this cleanup was a failure in libgomp.c/ordered-2.c 
for x86_64 target with -m32. The problem was, that i386-*-* targets 
compiled test cases with -march=i486, but this compile flag was missing 
when test cases were compiled for x86_64-*-* with -m32. This was leading 
to link errors with undefined reference to `__sync_fetch_and_add_4' for 
libgomp.c/ordered-2.c

Attached patch fixes this by checking current_target_name for "/-m32" 
string for x86_64-*-* targets and by setting ALWAYS_CFLAGS to 
-march=i486 if the pattern is found. This is consistent with libgomp's 
configure.tgt.

Additionally, libgomp.c/atomic-2.c was changed to use new -mcx16 compile 
flag instead of -march=nocona. By using this flag, we were able to get 
rid of the check for SSE3, as CX16 cpuid flag is independent of SSE3 flag.

Some default dg-options were also removed from testcases and x86 target 
specific dg-options in libgomp.c/atomic-1.c were simplified.

Otherwise fairly trivial patch was regression tested for libgomp on 
x86_64 with and without -m32. The patch cures ordered-2.c test failure 
for x86_64 -m32.

OK for mainline?

2007-03-17  Uros Bizjak  <ubizjak@gmail.com>

        * testsuite/lib/libgomp-dg.exp (libgomp_init): Set additional_flags
        to -march=i486 for target x86_64-*-* when tested with -m32.
        * testsuite/libgomp.c/c.exp: Set DEFAULT_FLAGS to -O2.
        * testsuite/libgomp.c/atomic-1.c: Set dg-options to
        "-O2 -march=pentium" for ilp32 x86 targets. Simplify check for 
CX8 flag.
        * testsuite/libgomp.c/atomic-2.c: Set dg-options to "-O2 -mcx16" for
        lp64 x86 targets. Do not check for SSE3 bit. Do not define bit_SSE3.
        * testsuite/libgomp.c/pr29947-1.c: Remove default dg-options.
        * testsuite/libgomp.c/pr29947-1.c: Ditto.
        * testsuite/libgomp.c/atomic-10.c: Ditto.

Uros.
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