rs6000/testsuite: Return 0 for powerpc_altivec_ok on other targets

2022-02-02  Segher Boessenkool  <segher@kernel.crashing.org>

gcc/testsuite/
	* lib/target-supports.exp (check_effective_target_powerpc_altivec_ok):
	Return 0 if the target is not Power.  Restructure and add some comments.

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index cffcdb5..4463cc8 100644 (file)
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -6181,21 +6181,21 @@ proc check_effective_target_powerpc_sqrt { } {
 # Return 1 if this is a PowerPC target supporting -maltivec.
 
 proc check_effective_target_powerpc_altivec_ok { } {
-    if { ([istarget powerpc*-*-*]
-         && ![istarget powerpc-*-linux*paired*])
-        || [istarget rs6000-*-*] } {
-       # AltiVec is not supported on AIX before 5.3.
-       if { [istarget powerpc*-*-aix4*]
-            || [istarget powerpc*-*-aix5.1*] 
-            || [istarget powerpc*-*-aix5.2*] } {
-           return 0
-       }
-       return [check_no_compiler_messages powerpc_altivec_ok object {
-           int dummy;
-       } "-maltivec"]
-    } else {
-       return 0
-    }
+    # Not PowerPC, then not ok
+    if { !([istarget powerpc*-*-*] || [istarget rs6000-*-*]) } { return 0 }
+
+    # Paired Single, then not ok
+    if { [istarget powerpc-*-linux*paired*] } { return 0 }
+
+    # AltiVec is not supported on AIX before 5.3.
+    if { [istarget powerpc*-*-aix4*]
+        || [istarget powerpc*-*-aix5.1*]
+        || [istarget powerpc*-*-aix5.2*] } { return 0 }
+
+    # Return true iff compiling with -maltivec does not error.
+    return [check_no_compiler_messages powerpc_altivec_ok object {
+       int dummy;
+    } "-maltivec"]
 }
 
 # Return 1 if this is a PowerPC target supporting -mpower8-vector