rs6000: Add effective target has_arch_ppc64

This is true if we have -mpowerpc64.

2022-04-21  Segher Boessenkool  <segher@kernel.crashing.org>

gcc/testsuite/
	* lib/target-supports.exp (check_effective_target_has_arch_ppc64): New.

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 90b9009..8bdb4a8 100644 (file)
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -6378,6 +6378,16 @@ proc check_effective_target_has_arch_pwr10 { } {
        }]
 }
 
+proc check_effective_target_has_arch_ppc64 { } {
+       return [check_no_compiler_messages arch_ppc64 assembly {
+               #ifndef _ARCH_PPC64
+               #error does not have ppc64 support.
+               #else
+               /* "has ppc64 support" */
+               #endif
+       }]
+}
+
 # Return 1 if this is a PowerPC target supporting -mcpu=power10.
 # Limit this to 64-bit linux systems for now until other targets support
 # power10.