--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/CodeGen/mozilla-ms-inline-asm.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,64 @@
+// REQUIRES: x86-registered-target
+// RUN: %clang_cc1 %s -triple i386-apple-darwin10 -fasm-blocks -emit-llvm -o - | opt -strip -S | FileCheck %s
+
+// Some test cases for MS inline asm support from Mozilla code base.
+
+void invoke_copy_to_stack() {}
+
+void invoke(void* that, unsigned methodIndex,
+            unsigned paramCount, void* params)
+{
+// CHECK: @invoke
+// CHECK: %5 = alloca i8*, align 4
+// CHECK: %6 = alloca i32, align 4
+// CHECK: %7 = alloca i32, align 4
+// CHECK: %8 = alloca i8*, align 4
+// CHECK: store i8* %0, i8** %5, align 4
+// CHECK: store i32 %1, i32* %6, align 4
+// CHECK: store i32 %2, i32* %7, align 4
+// CHECK: store i8* %3, i8** %8, align 4
+// CHECK: call void asm sideeffect inteldialect
+// CHECK-SAME: mov edx,$1
+// CHECK-SAME: test edx,edx
+// CHECK-SAME: jz {{[^_]*}}__MSASMLABEL_.${:uid}__noparams
+//                ^ Can't use {{.*}} here because the matching is greedy.
+// CHECK-SAME: mov eax,edx
+// CHECK-SAME: shl eax,$$3
+// CHECK-SAME: sub esp,eax
+// CHECK-SAME: mov ecx,esp
+// CHECK-SAME: push $0
+// CHECK-SAME: call dword ptr ${2:P}
+// CHECK-SAME: {{.*}}__MSASMLABEL_.${:uid}__noparams:
+// CHECK-SAME: mov ecx,$3
+// CHECK-SAME: push ecx
+// CHECK-SAME: mov edx,[ecx]
+// CHECK-SAME: mov eax,$4
+// CHECK-SAME: call dword ptr[edx + eax * $$4]
+// CHECK-SAME: mov esp,ebp
+// CHECK-SAME: pop ebp
+// CHECK-SAME: ret
+// CHECK: "=*m,*m,*m,*m,*m,~{eax},~{ebp},~{ecx},~{edx},~{flags},~{esp},~{dirflag},~{fpsr},~{flags}"
+// CHECK: (i8** %8, i32* %7, void (...)* bitcast (void ()* @invoke_copy_to_stack to void (...)*), i8** %5, i32* %6)
+// CHECK: ret void
+    __asm {
+        mov     edx,paramCount
+        test    edx,edx
+        jz      noparams
+        mov     eax,edx
+        shl     eax,3
+        sub     esp,eax
+        mov     ecx,esp
+        push    params
+        call    invoke_copy_to_stack
+noparams:
+        mov     ecx,that
+        push    ecx
+        mov     edx,[ecx]
+        mov     eax,methodIndex
+        call    dword ptr[edx+eax*4]
+        mov     esp,ebp
+        pop     ebp
+        ret
+    }
+}
+