1 files changed, 52 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/asm-02.ll b/test/CodeGen/SystemZ/asm-02.ll
new file mode 100644
index 000000000000..12d8bec161ce
--- /dev/null
+++ b/test/CodeGen/SystemZ/asm-02.ll
@@ -0,0 +1,52 @@
+; Test the "R" asm constraint, which accepts addresses that have a base,
+; an index and a 12-bit displacement.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check the lowest range.
+define void @f1(i64 %base) {
+; CHECK: f1:
+; CHECK: blah 0(%r2)
+; CHECK: br %r14
+  %addr = inttoptr i64 %base to i64 *
+  call void asm "blah $0", "=*R" (i64 *%addr)
+  ret void
+}
+
+; Check the next lowest byte.
+define void @f2(i64 %base) {
+; CHECK: f2:
+; CHECK: aghi %r2, -1
+; CHECK: blah 0(%r2)
+; CHECK: br %r14
+  %add = add i64 %base, -1
+  %addr = inttoptr i64 %add to i64 *
+  call void asm "blah $0", "=*R" (i64 *%addr)
+  ret void
+}
+
+; Check the highest range.
+define void @f3(i64 %base) {
+; CHECK: f3:
+; CHECK: blah 4095(%r2)
+; CHECK: br %r14
+  %add = add i64 %base, 4095
+  %addr = inttoptr i64 %add to i64 *
+  call void asm "blah $0", "=*R" (i64 *%addr)
+  ret void
+}
+
+; Check the next highest byte.
+define void @f4(i64 %base) {
+; CHECK: f4:
+; CHECK: aghi %r2, 4096
+; CHECK: blah 0(%r2)
+; CHECK: br %r14
+  %add = add i64 %base, 4096
+  %addr = inttoptr i64 %add to i64 *
+  call void asm "blah $0", "=*R" (i64 *%addr)
+  ret void
+}
+
+; FIXME: at the moment the precise constraint is not passed down to
+; target code, so we must conservatively treat "R" as "Q".