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      1 // RUN: %clang_cc1 -triple i386-pc-win32 %s -emit-llvm -fms-compatibility -o - | FileCheck %s
      2 
      3 __declspec(selectany) int x1 = 1;
      4 const __declspec(selectany) int x2 = 2;
      5 // CHECK: @x1 = weak_odr global i32 1, comdat, align 4
      6 // CHECK: @x2 = weak_odr constant i32 2, comdat, align 4
      7 
      8 // selectany turns extern variable declarations into definitions.
      9 __declspec(selectany) int x3;
     10 extern __declspec(selectany) int x4;
     11 // CHECK: @x3 = weak_odr global i32 0, comdat, align 4
     12 // CHECK: @x4 = weak_odr global i32 0, comdat, align 4
     13 
     14 struct __declspec(align(16)) S {
     15   char x;
     16 };
     17 union { struct S s; } u;
     18 
     19 // CHECK: @u = {{.*}}zeroinitializer, align 16
     20 
     21 
     22 // CHECK: define void @t3() [[NAKED:#[0-9]+]] {
     23 __declspec(naked) void t3() {}
     24 
     25 // CHECK: define void @t22() [[NUW:#[0-9]+]]
     26 void __declspec(nothrow) t22();
     27 void t22() {}
     28 
     29 // CHECK: define void @t2() [[NI:#[0-9]+]] {
     30 __declspec(noinline) void t2() {}
     31 
     32 // CHECK: call void @f20_t() [[NR:#[0-9]+]]
     33 __declspec(noreturn) void f20_t(void);
     34 void f20(void) { f20_t(); }
     35 
     36 __declspec(noalias) void noalias_callee(int *x);
     37 // CHECK: call void @noalias_callee({{.*}}) [[NA:#[0-9]+]]
     38 void noalias_caller(int *x) { noalias_callee(x); }
     39 
     40 // CHECK: attributes [[NAKED]] = { naked noinline nounwind{{.*}} }
     41 // CHECK: attributes [[NUW]] = { nounwind{{.*}} }
     42 // CHECK: attributes [[NI]] = { noinline nounwind{{.*}} }
     43 // CHECK: attributes [[NR]] = { noreturn }
     44 // CHECK: attributes [[NA]] = { argmemonly nounwind{{.*}} }
     45