[PowerPC][clang] Fix triple constructor ambiguity causing "unknown" target triple on AIX

Author: Tony Varghese

clang/test/Driver/aix-default-target-triple.c

@@ -0,0 +1,15 @@
+// Test for the Triple constructor ambiguity fix on AIX
+// This test verifies that the default target triple is correctly resolved
+// and doesn't fall back to "unknown" due to constructor ambiguity.
+
+// REQUIRES: system-aix
+// RUN: %clang -v %s -c 2>&1 | FileCheck %s --check-prefix=CHECK-TARGET
+
+// Test that the target triple contains AIX and is not "unknown"
+// The target should be something like "powerpc-ibm-aix7.3.0.0"
+// CHECK-TARGET: Target: {{.*}}aix{{.*}}
+// CHECK-TARGET-NOT: error: unknown target triple 'unknown'
+
+int main() {
+    return 0;
+}

llvm/lib/TargetParser/Unix/Host.inc

@@ -55,7 +55,7 @@ static std::string updateTripleOSVersion(std::string TargetTripleString) {
   // On AIX, the AIX version and release should be that of the current host
   // unless if the version has already been specified.
   if (Triple(LLVM_HOST_TRIPLE).getOS() == Triple::AIX) {
-    Triple TT(std::move(TargetTripleString));
+    Triple TT{TargetTripleString};
     if (TT.getOS() == Triple::AIX && !TT.getOSMajorVersion()) {
       struct utsname name;
       if (uname(&name) != -1) {