1 files changed, 113 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/SystemZ/cmpxchg-06.ll b/llvm/test/CodeGen/SystemZ/cmpxchg-06.ll
new file mode 100644
index 00000000000..da565791c7c
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/cmpxchg-06.ll
@@ -0,0 +1,113 @@
+; Test 64-bit compare and swap.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check CDSG without a displacement.
+define i128 @f1(i128 %cmp, i128 %swap, i128 *%src) {
+; CHECK-LABEL: f1:
+; CHECK-DAG: lg %r1, 8(%r4)
+; CHECK-DAG: lg %r0, 0(%r4)
+; CHECK-DAG: lg %r13, 8(%r3)
+; CHECK-DAG: lg %r12, 0(%r3)
+; CHECK:     cdsg %r12, %r0, 0(%r5)
+; CHECK-DAG: stg %r13, 8(%r2)
+; CHECK-DAG: stg %r12, 0(%r2)
+; CHECK:     br %r14
+  %pairval = cmpxchg i128 *%src, i128 %cmp, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check the high end of the aligned CDSG range.
+define i128 @f2(i128 %cmp, i128 %swap, i128 *%src) {
+; CHECK-LABEL: f2:
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, 524272(%r5)
+; CHECK: br %r14
+  %ptr = getelementptr i128, i128 *%src, i128 32767
+  %pairval = cmpxchg i128 *%ptr, i128 %cmp, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check the next doubleword up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define i128 @f3(i128 %cmp, i128 %swap, i128 *%src) {
+; CHECK-LABEL: f3:
+; CHECK: agfi %r5, 524288
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, 0(%r5)
+; CHECK: br %r14
+  %ptr = getelementptr i128, i128 *%src, i128 32768
+  %pairval = cmpxchg i128 *%ptr, i128 %cmp, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check the high end of the negative aligned CDSG range.
+define i128 @f4(i128 %cmp, i128 %swap, i128 *%src) {
+; CHECK-LABEL: f4:
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, -16(%r5)
+; CHECK: br %r14
+  %ptr = getelementptr i128, i128 *%src, i128 -1
+  %pairval = cmpxchg i128 *%ptr, i128 %cmp, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check the low end of the CDSG range.
+define i128 @f5(i128 %cmp, i128 %swap, i128 *%src) {
+; CHECK-LABEL: f5:
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, -524288(%r5)
+; CHECK: br %r14
+  %ptr = getelementptr i128, i128 *%src, i128 -32768
+  %pairval = cmpxchg i128 *%ptr, i128 %cmp, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check the next doubleword down, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define i128 @f6(i128 %cmp, i128 %swap, i128 *%src) {
+; CHECK-LABEL: f6:
+; CHECK: agfi %r5, -524304
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, 0(%r5)
+; CHECK: br %r14
+  %ptr = getelementptr i128, i128 *%src, i128 -32769
+  %pairval = cmpxchg i128 *%ptr, i128 %cmp, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check that CDSG does not allow an index.
+define i128 @f7(i128 %cmp, i128 %swap, i64 %src, i64 %index) {
+; CHECK-LABEL: f7:
+; CHECK: agr %r5, %r6
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, 0(%r5)
+; CHECK: br %r14
+  %add1 = add i64 %src, %index
+  %ptr = inttoptr i64 %add1 to i128 *
+  %pairval = cmpxchg i128 *%ptr, i128 %cmp, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check that a constant %cmp value is loaded into a register first.
+define i128 @f8(i128 %swap, i128 *%ptr) {
+; CHECK-LABEL: f8:
+; CHECK: lghi {{%r[0-9]+}}, 1001
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, 0(%r4)
+; CHECK: br %r14
+  %pairval = cmpxchg i128 *%ptr, i128 1001, i128 %swap seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}
+
+; Check that a constant %swap value is loaded into a register first.
+define i128 @f9(i128 %cmp, i128 *%ptr) {
+; CHECK-LABEL: f9:
+; CHECK: lghi {{%r[0-9]+}}, 1002
+; CHECK: cdsg {{%r[0-9]+}}, {{%r[0-9]+}}, 0(%r4)
+; CHECK: br %r14
+  %pairval = cmpxchg i128 *%ptr, i128 %cmp, i128 1002 seq_cst seq_cst
+  %val = extractvalue { i128, i1 } %pairval, 0
+  ret i128 %val
+}