1 files changed, 43 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/cmpxchg-weak.ll b/test/CodeGen/ARM/cmpxchg-weak.ll
new file mode 100644
index 0000000000..126e330626
--- /dev/null
+++ b/test/CodeGen/ARM/cmpxchg-weak.ll
@@ -0,0 +1,43 @@
+; RUN: llc < %s -mtriple=armv7-apple-ios -verify-machineinstrs | FileCheck %s
+
+define void @test_cmpxchg_weak(i32 *%addr, i32 %desired, i32 %new) {
+; CHECK-LABEL: test_cmpxchg_weak:
+
+  %pair = cmpxchg weak i32* %addr, i32 %desired, i32 %new seq_cst monotonic
+  %oldval = extractvalue { i32, i1 } %pair, 0
+; CHECK:     dmb ish
+; CHECK:     ldrex   [[LOADED:r[0-9]+]], [r0]
+; CHECK:     cmp     [[LOADED]], r1
+; CHECK:     strexeq [[SUCCESS:r[0-9]+]], r2, [r0]
+; CHECK:     cmpeq   [[SUCCESS]], #0
+; CHECK:     bne     [[DONE:LBB[0-9]+_[0-9]+]]
+; CHECK:     dmb     ish
+; CHECK: [[DONE]]:
+; CHECK:     str     r3, [r0]
+; CHECK:     bx      lr
+
+  store i32 %oldval, i32* %addr
+  ret void
+}
+
+
+define i1 @test_cmpxchg_weak_to_bool(i32, i32 *%addr, i32 %desired, i32 %new) {
+; CHECK-LABEL: test_cmpxchg_weak_to_bool:
+
+  %pair = cmpxchg weak i32* %addr, i32 %desired, i32 %new seq_cst monotonic
+  %success = extractvalue { i32, i1 } %pair, 1
+
+; CHECK:      dmb     ish
+; CHECK:      mov     r0, #0
+; CHECK:      ldrex   [[LOADED:r[0-9]+]], [r1]
+; CHECK:      cmp     [[LOADED]], r2
+; CHECK:      strexeq [[STATUS:r[0-9]+]], r3, [r1]
+; CHECK:      cmpeq   [[STATUS]], #0
+; CHECK:      bne     [[DONE:LBB[0-9]+_[0-9]+]]
+; CHECK:      dmb     ish
+; CHECK:      mov     r0, #1
+; CHECK: [[DONE]]:
+; CHECK:      bx      lr
+
+  ret i1 %success
+}