53 lines · cpp
1// RUN: %clang_cc1 -Wno-non-pod-varargs -emit-llvm %s -o - -triple=i686-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck %s2 3#include <stdarg.h>4 5struct A {6 A(int a) : a(a) {}7 A(const A &o) : a(o.a) {}8 ~A() {}9 int a;10};11 12int foo(A a, ...) {13 va_list ap;14 va_start(ap, a);15 int sum = 0;16 for (int i = 0; i < a.a; ++i)17 sum += va_arg(ap, int);18 va_end(ap);19 return sum;20}21 22// CHECK-LABEL: define dso_local noundef i32 @"?foo@@YAHUA@@ZZ"(ptr inalloca(<{ %struct.A }>) %0, ...)23 24int main() {25 return foo(A(3), 1, 2, 3);26}27// CHECK-LABEL: define dso_local noundef i32 @main()28// CHECK: %[[argmem:[^ ]*]] = alloca inalloca <{ %struct.A, i32, i32, i32 }>29// CHECK: call noundef i32 (ptr, ...) @"?foo@@YAHUA@@ZZ"{{.*}}(ptr inalloca(<{ %struct.A, i32, i32, i32 }>) %[[argmem]])30 31void varargs_zero(...);32void varargs_one(int, ...);33void varargs_two(int, int, ...);34void varargs_three(int, int, int, ...);35void call_var_args() {36 A x(3);37 varargs_zero(x);38 varargs_one(1, x);39 varargs_two(1, 2, x);40 varargs_three(1, 2, 3, x);41}42 43// CHECK-LABEL: define dso_local void @"?call_var_args@@YAXXZ"()44// CHECK: call void {{.*varargs_zero.*}}(ptr inalloca(<{ %struct.A }>) %{{.*}})45// CHECK: call void {{.*varargs_one.*}}(ptr inalloca(<{ i32, %struct.A }>) %{{.*}})46// CHECK: call void {{.*varargs_two.*}}(ptr inalloca(<{ i32, i32, %struct.A }>) %{{.*}})47// CHECK: call void {{.*varargs_three.*}}(ptr inalloca(<{ i32, i32, i32, %struct.A }>) %{{.*}})48 49// CHECK-LABEL: declare dso_local void @"?varargs_zero@@YAXZZ"(...)50// CHECK-LABEL: declare dso_local void @"?varargs_one@@YAXHZZ"(i32 noundef, ...)51// CHECK-LABEL: declare dso_local void @"?varargs_two@@YAXHHZZ"(i32 noundef, i32 noundef, ...)52// CHECK-LABEL: declare dso_local void @"?varargs_three@@YAXHHHZZ"(i32 noundef, i32 noundef, i32 noundef, ...)53