1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/X86/x86-flags-intrinsics.ll b/test/CodeGen/X86/x86-flags-intrinsics.ll
new file mode 100644
index 0000000000000..325de7d5f1e7c
--- /dev/null
+++ b/test/CodeGen/X86/x86-flags-intrinsics.ll
@@ -0,0 +1,31 @@
+; RUN: llc < %s | FileCheck %s
+target triple = "i686-pc-win32"
+
+declare i32 @llvm.x86.flags.read.u32()
+declare void @llvm.x86.flags.write.u32(i32)
+
+define i32 @read_flags() {
+entry:
+  %flags = call i32 @llvm.x86.flags.read.u32()
+  ret i32 %flags
+}
+
+; CHECK-LABEL: _read_flags:
+; CHECK:      pushl   %ebp
+; CHECK-NEXT: movl    %esp, %ebp
+; CHECK-NEXT: pushfl
+; CHECK-NEXT: popl    %eax
+; CHECK-NEXT: popl    %ebp
+
+define x86_fastcallcc void @write_flags(i32 inreg %arg) {
+entry:
+  call void @llvm.x86.flags.write.u32(i32 %arg)
+  ret void
+}
+
+; CHECK-LABEL: @write_flags@4:
+; CHECK:      pushl   %ebp
+; CHECK-NEXT: movl    %esp, %ebp
+; CHECK-NEXT: pushl   %ecx
+; CHECK-NEXT: popfl
+; CHECK-NEXT: popl    %ebp