afba553ede
Of course, such code is horribly broken and will explode on impact. That said, ATL does it, and we have to support them, at least a little bit. Fixes PR20191. llvm-svn: 212508
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
// RUN: %clang_cc1 -Wno-non-pod-varargs -emit-llvm %s -o - -triple=i686-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck %s
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#include <stdarg.h>
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struct A {
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A(int a) : a(a) {}
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A(const A &o) : a(o.a) {}
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~A() {}
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int a;
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};
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int foo(A a, ...) {
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va_list ap;
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va_start(ap, a);
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int sum = 0;
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for (int i = 0; i < a.a; ++i)
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sum += va_arg(ap, int);
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va_end(ap);
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return sum;
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}
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// CHECK-LABEL: define i32 @"\01?foo@@YAHUA@@ZZ"(<{ %struct.A }>* inalloca, ...)
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int main() {
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return foo(A(3), 1, 2, 3);
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}
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// CHECK-LABEL: define i32 @main()
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// CHECK: %[[argmem:[^ ]*]] = alloca inalloca <{ %struct.A, i32, i32, i32 }>
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// CHECK: call i32 {{.*bitcast.*}}@"\01?foo@@YAHUA@@ZZ"{{.*}}(<{ %struct.A, i32, i32, i32 }>* inalloca %[[argmem]])
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void varargs_zero(...);
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void varargs_one(int, ...);
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void varargs_two(int, int, ...);
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void varargs_three(int, int, int, ...);
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void call_var_args() {
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A x(3);
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varargs_zero(x);
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varargs_one(1, x);
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varargs_two(1, 2, x);
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varargs_three(1, 2, 3, x);
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}
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// CHECK-LABEL: define void @"\01?call_var_args@@YAXXZ"()
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// CHECK: call void {{.*bitcast.*varargs_zero.*}}(<{ %struct.A }>* inalloca %{{.*}})
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// CHECK: call void {{.*bitcast.*varargs_one.*}}(<{ i32, %struct.A }>* inalloca %{{.*}})
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// CHECK: call void {{.*bitcast.*varargs_two.*}}(<{ i32, i32, %struct.A }>* inalloca %{{.*}})
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// CHECK: call void {{.*bitcast.*varargs_three.*}}(<{ i32, i32, i32, %struct.A }>* inalloca %{{.*}})
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// CHECK-LABEL: declare void @"\01?varargs_zero@@YAXZZ"(...)
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// CHECK-LABEL: declare void @"\01?varargs_one@@YAXHZZ"(i32, ...)
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// CHECK-LABEL: declare void @"\01?varargs_two@@YAXHHZZ"(i32, i32, ...)
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// CHECK-LABEL: declare void @"\01?varargs_three@@YAXHHHZZ"(i32, i32, i32, ...)
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