PowerPC Add has_arch_pwr* checks

[will schmidt]

PowerPC Add has_arch_pwr* checks
    
Hi,
   This adds some procs to target-supports.exp that will allow
our testcases to accurately determine which -mcpu= option
is enabled at the time of our testcase compile.
For completeness I've added blobs to cover the ARCH_PWR5
through ARCH_PWR9 targets.
With this in place, the existing pr92132-fp-1.c testcase
is updated with a target check such that it now passes
reliably on targets that include power8 support, and skips
(unsupported) those that do not.
    
Tested on assorted powerpc targets with the incantation
make -k check-gcc-c "RUNTESTFLAGS=powerpc.exp=pr92132-fp-1*.c
   --target_board=unix/'{-mcpu=power5,-mcpu=power6,-mcpu=power7,
   -mcpu=power8,-mcpu=power9}''{-m32,-m64}'"

OK for master?
    
Thanks
-Will
    
testsuite/
    
2020-02-25 Will Schmidt  <will_schm...@vnet.ibm.com>
    
      * lib/target_supports.exp (check_effective_target_has_arch_pwr5): New.
      (check_effective_target_has_arch_pwr6): New.
      (check_effective_target_has_arch_pwr7): New.
      (check_effective_target_has_arch_pwr8): New.
      (check_effective_target_has_arch_pwr9): New.
      * gcc.target/powerpc/pr92132-fp-1.c: Add target check.

diff --git a/gcc/testsuite/gcc.target/powerpc/pr92132-fp-1.c 
b/gcc/testsuite/gcc.target/powerpc/pr92132-fp-1.c
index 1023e8c..c5cbb62 100644
--- a/gcc/testsuite/gcc.target/powerpc/pr92132-fp-1.c
+++ b/gcc/testsuite/gcc.target/powerpc/pr92132-fp-1.c
@@ -292,6 +292,6 @@ main (void)
     abort ();
 
   return 0;
 }
 
-/* { dg-final { scan-tree-dump-times "LOOP VECTORIZED" 14 "vect" } } */
+/* { dg-final { scan-tree-dump-times "LOOP VECTORIZED" 14 "vect" { target 
has_arch_pwr8 } } } */
diff --git a/gcc/testsuite/lib/target-supports.exp 
b/gcc/testsuite/lib/target-supports.exp
index ec46231..038a7bb 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -5505,10 +5505,58 @@ proc check_effective_target_powerpc_p9modulo_ok { } {
     } else {
        return 0
     }
 }
 
+# return 1 if our compiler returns the ARCH_PWR defines with the options
+# as provided by the test.
+proc check_effective_target_has_arch_pwr5 { } {
+       return [check_no_compiler_messages arch_pwr5 assembly {
+               #ifndef _ARCH_PWR5
+               #error does not have power5 support.
+               #else
+               /* "has power5 support" */
+               #endif
+       }]
+}
+proc check_effective_target_has_arch_pwr6 { } {
+       return [check_no_compiler_messages arch_pwr6 assembly {
+               #ifndef _ARCH_PWR6
+               #error does not have power6 support.
+               #else
+               /* "has power6 support" */
+               #endif
+       }]
+}
+proc check_effective_target_has_arch_pwr7 { } {
+       return [check_no_compiler_messages arch_pwr7 assembly {
+               #ifndef _ARCH_PWR7
+               #error does not have power7 support.
+               #else
+               /* "has power7 support" */
+               #endif
+       }]
+}
+proc check_effective_target_has_arch_pwr8 { } {
+       return [check_no_compiler_messages arch_pwr8 assembly {
+               #ifndef _ARCH_PWR8
+               #error does not have power8 support.
+               #else
+               /* "has power8 support" */
+               #endif
+       }]
+}
+proc check_effective_target_has_arch_pwr9 { } {
+       return [check_no_compiler_messages arch_pwr9 assembly {
+               #ifndef _ARCH_PWR9
+               #error does not have power9 support.
+               #else
+               /* "has power9 support" */
+               #endif
+       }]
+}
+
 # Return 1 if this is a PowerPC target supporting -mfuture.
 # Limit this to 64-bit linux systems for now until other
 # targets support FUTURE.
 
 proc check_effective_target_powerpc_future_ok { } {