fixup! [SPARC] Support reserving arbitrary general purpose registers

Author: koachan

llvm/test/CodeGen/SPARC/reserved-regs-unavailable.ll

@@ -0,0 +1,14 @@
+; RUN: not --crash llc -mtriple=sparc64-linux-gnu -o - %s 2>&1 | FileCheck %s --check-prefixes=CHECK-RESERVED-L0
+
+;; Ensure explicit register references for non-reserved registers
+;; are caught properly.
+
+; CHECK-RESERVED-L0: LLVM ERROR: Invalid register name global variable
+define void @set_reg(i32 zeroext %x) {
+entry:
+  tail call void @llvm.write_register.i32(metadata !0, i32 %x)
+  ret void
+}
+
+declare void @llvm.write_register.i32(metadata, i32)
+!0 = !{!"l0"}