clang/test/CodeGen/functions.c

   1 // RUN: %clang_cc1 %s -triple i386-unknown-unknown -Wno-strict-prototypes -emit-llvm -o - -verify | FileCheck %s
   2
   3 int g();
   4
   5 int foo(int i) {
   6   return g(i);
   7 }
   8
   9 int g(int i) {
  10   return g(i);
  11 }
  12
  13 typedef void T(void);
  14 void test3(T f) {
  15   f();
  16 }
  17
  18 void f0(void) {}
  19 // CHECK-LABEL: define{{.*}} void @f0()
  20
  21 void f1();
  22 void f2(void) {
  23 // CHECK: call void @f1()
  24   f1(1, 2, 3);
  25 }
  26 // CHECK-LABEL: define{{.*}} void @f1()
  27 void f1() {}
  28
  29 // CHECK: define {{.*}} @f3{{\(\)|\(.*sret.*\)}}
  30 struct foo { int X, Y, Z; } f3(void) {
  31   while (1) {}
  32 }
  33
  34 // PR4423 - This shouldn't crash in codegen
  35 void f4() {}
  36 void f5(void) { f4(42); } //expected-warning {{too many arguments}}
  37
  38 // Qualifiers on parameter types shouldn't make a difference.
  39 static void f6(const float f, const float g) {
  40 }
  41 void f7(float f, float g) {
  42   f6(f, g);
  43 // CHECK: define{{.*}} void @f7(float{{.*}}, float{{.*}})
  44 // CHECK: call void @f6(float{{.*}}, float{{.*}})
  45 }
  46
  47 // PR6911 - incomplete function types
  48 struct Incomplete;
  49 void f8_callback(struct Incomplete);
  50 void f8_user(void (*callback)(struct Incomplete));
  51 void f8_test(void) {
  52   f8_user(&f8_callback);
  53 // CHECK-LABEL: define{{.*}} void @f8_test()
  54 // CHECK: call void @f8_user(ptr noundef @f8_callback)
  55 // CHECK: declare void @f8_user(ptr noundef)
  56 // CHECK: declare void @f8_callback()
  57 }
  58
  59 // PR10204: don't crash
  60 static void test9_helper(void) {}
  61 void test9(void) {
  62   (void) test9_helper;
  63 }
  64
  65 // PR88917: don't crash
  66 int b();
  67
  68 int main() {
  69         return b(b);
  70         // CHECK: call i32 @b(ptr noundef @b)
  71 }
  72 int b(int (*f)()){
  73   return 0;
  74 }
  75 // CHECK-LABEL: define{{.*}} i32 @b(ptr noundef %f)