Add some tests for NVPTX lowering of cmpxchg

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213586 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/NVPTX/atomics.ll b/test/CodeGen/NVPTX/atomics.ll
index 00e02a7f9b2c8f1c34beeaf3d62887bbed1712d0..daadb6e9c1a0b7c0a7b7df71a19a9a6066f28462 100644 (file)
--- a/test/CodeGen/NVPTX/atomics.ll
+++ b/test/CodeGen/NVPTX/atomics.ll
@@ -166,3 +166,17 @@ define float @atomic_add_f32_addrspace3(float addrspace(3)* %addr, float %val) {
   %ret = call float @llvm.nvvm.atomic.load.add.f32.p3f32(float addrspace(3)* %addr, float %val)
   ret float %ret
 }
+
+; CHECK-LABEL: atomic_cmpxchg_i32
+define i32 @atomic_cmpxchg_i32(i32* %addr, i32 %cmp, i32 %new) {
+; CHECK: atom.cas.b32
+  %pairold = cmpxchg i32* %addr, i32 %cmp, i32 %new seq_cst seq_cst
+  ret i32 %new
+}
+
+; CHECK-LABEL: atomic_cmpxchg_i64
+define i64 @atomic_cmpxchg_i64(i64* %addr, i64 %cmp, i64 %new) {
+; CHECK: atom.cas.b64
+  %pairold = cmpxchg i64* %addr, i64 %cmp, i64 %new seq_cst seq_cst
+  ret i64 %new
+}