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      1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
      2 
      3 int x;
      4 int y(void);
      5 void foo();
      6 void FUNC() {
      7 // CHECK: [[call:%.*]] = call i32 @y
      8   if (__builtin_expect (x, y()))
      9     foo ();
     10 }
     11 
     12 // rdar://9330105
     13 void isigprocmask(void);
     14 long bar();
     15 
     16 int main() {
     17     (void) __builtin_expect((isigprocmask(), 0), bar());
     18 }
     19 
     20 // CHECK: call void @isigprocmask()
     21 // CHECK: [[C:%.*]] = call i64 (...)* @bar()
     22 
     23 
     24 // CHECK: @test1
     25 int test1(int x) {
     26 // CHECK: @llvm.expect
     27   if (__builtin_expect (x, 1))
     28     return 0;
     29   return x;
     30 }
     31 
     32 // CHECK: @test2
     33 int test2(int x) {
     34 // CHECK: @llvm.expect
     35   switch(__builtin_expect(x, 5)) {
     36   default:
     37     return 0;
     38   case 0:
     39   case 1:
     40   case 2:
     41     return 1;
     42   case 5:
     43     return 5;
     44   };
     45 
     46   return 0;
     47 }
     48