1 files changed, 24 insertions, 0 deletions
diff --git a/clang/test/CodeGen/asm-reg-var-local.c b/clang/test/CodeGen/asm-reg-var-local.c
new file mode 100644
index 0000000..9060e12
--- /dev/null
+++ b/clang/test/CodeGen/asm-reg-var-local.c
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 %s -triple x86_64-apple-darwin -emit-llvm -o - | FileCheck %s
+// Exercise various use cases for local asm "register variables".
+
+int foo() {
+// CHECK: [[A:%[a-zA-Z0-9]+]] = alloca i32
+
+  register int a asm("rsi")=5;
+// CHECK: store i32 5, i32* [[A]]
+
+  asm volatile("; %0 This asm defines rsi" : "=r"(a));
+// CHECK: [[Z:%[a-zA-Z0-9]+]] = call i32 asm sideeffect "; $0 This asm defines rsi", "={rsi},~{dirflag},~{fpsr},~{flags}"()
+// CHECK: store i32 [[Z]], i32* [[A]]
+
+  a = 42;
+// CHECK:  store i32 42, i32* [[A]]
+
+  asm volatile("; %0 This asm uses rsi" : : "r"(a));
+// CHECK:  [[TMP:%[a-zA-Z0-9]+]] = load i32* [[A]]
+// CHECK:  call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 [[TMP]])
+
+  return a;
+// CHECK:  [[TMP1:%[a-zA-Z0-9]+]] = load i32* [[A]]
+// CHECK:  ret i32 [[TMP1]]
+}