Don't use %g0 to materialize 0 directly.
The wired physreg doesn't work on tied operands like on MOVXCC.
Add a README note to fix this later.
llvm-svn: 182225
diff --git a/llvm/test/CodeGen/SPARC/64cond.ll b/llvm/test/CodeGen/SPARC/64cond.ll
index 0c025b3..594eff6 100644
--- a/llvm/test/CodeGen/SPARC/64cond.ll
+++ b/llvm/test/CodeGen/SPARC/64cond.ll
@@ -98,3 +98,14 @@
%rv = select i1 %tobool, double %a, double %b
ret double %rv
}
+
+; The MOVXCC instruction can't use %g0 for its tied operand.
+; CHECK: select_consti64_xcc
+; CHECK: subcc
+; CHECK: movg %xcc, 123, %i0
+define i64 @select_consti64_xcc(i64 %x, i64 %y) {
+entry:
+ %tobool = icmp sgt i64 %x, %y
+ %rv = select i1 %tobool, i64 123, i64 0
+ ret i64 %rv
+}