1 // RUN: %clang_cc1 < %s -triple i386-mingw32 -fms-extensions -emit-llvm -x c++ | FileCheck %s
2 
3 // optnone wins over inlinehint.
4 // Test that both func1 and func2 are marked optnone and noinline.
5 
6 // Definition with both optnone and inlinehint.
7 __attribute__((optnone))
func1(int a)8 inline int func1(int a) {
9   return a + a + a + a;
10 }
11 // CHECK: @_Z5func1i({{.*}}) [[OPTNONE:#[0-9]+]]
12 
13 // optnone declaration, inlinehint definition.
14 __attribute__((optnone))
15 int func2(int a);
16 
func2(int a)17 inline int func2(int a) {
18   return a + a + a + a;
19 }
20 // CHECK: @_Z5func2i({{.*}}) [[OPTNONE]]
21 
22 // Keep alive the definitions of func1 and func2.
foo()23 int foo() {
24   int val = func1(1);
25   return val + func2(2);
26 }
27 
28 // optnone wins over minsize.
29 __attribute__((optnone))
30 int func3(int a);
31 
32 __attribute__((minsize))
func3(int a)33 int func3(int a) {
34   return a + a + a + a;
35 }
36 // Same attribute set as everything else, therefore no 'minsize'.
37 // CHECK: @_Z5func3i({{.*}}) [[OPTNONE]]
38 
39 
40 // Verify that noreturn is compatible with optnone.
41 __attribute__((noreturn))
42 extern void exit_from_function();
43 
44 __attribute__((noreturn)) __attribute((optnone))
noreturn_function(int a)45 extern void noreturn_function(int a) { exit_from_function(); }
46 // CHECK: @_Z17noreturn_functioni({{.*}}) [[NORETURN:#[0-9]+]]
47 
48 
49 // Verify that __declspec(noinline) is compatible with optnone.
50 __declspec(noinline) __attribute__((optnone))
func4()51 void func4() { return; }
52 // CHECK: @_Z5func4v() [[OPTNONE]]
53 
54 __declspec(noinline)
55 extern void func5();
56 
57 __attribute__((optnone))
func5()58 void func5() { return; }
59 // CHECK: @_Z5func5v() [[OPTNONE]]
60 
61 
62 // Verify also that optnone can be used on dllexport functions.
63 // Adding attribute optnone on a dllimport function has no effect.
64 
65 __attribute__((dllimport))
66 __attribute__((optnone))
67 int imported_optnone_func(int a);
68 
69 __attribute__((dllexport))
70 __attribute__((optnone))
exported_optnone_func(int a)71 int exported_optnone_func(int a) {
72   return imported_optnone_func(a); // use of imported func
73 }
74 // CHECK: @_Z21exported_optnone_funci({{.*}}) [[OPTNONE]]
75 // CHECK: declare dllimport {{.*}} @_Z21imported_optnone_funci({{.*}}) [[DLLIMPORT:#[0-9]+]]
76 
77 
78 // CHECK: attributes [[OPTNONE]] = { noinline {{.*}} optnone
79 // CHECK: attributes [[NORETURN]] = { noinline noreturn {{.*}} optnone
80 
81 // CHECK: attributes [[DLLIMPORT]] =
82 // CHECK-NOT: optnone
83