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      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))
      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 
     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.
     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))
     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))
     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))
     51 void func4() { return; }
     52 // CHECK: @_Z5func4v() [[OPTNONE]]
     53 
     54 __declspec(noinline)
     55 extern void func5();
     56 
     57 __attribute__((optnone))
     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))
     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