xref: /llvm-project/clang/test/CodeGen/bpf-union-argument.c (revision 481d67d310a7a4213da72f838d6bafaa52ed01d3) 
1*481d67d3SYonghong Song // REQUIRES: bpf-registered-target
2*481d67d3SYonghong Song // RUN: %clang_cc1 -triple bpf -O2 -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s
3*481d67d3SYonghong Song 
4*481d67d3SYonghong Song union t1 {};
5*481d67d3SYonghong Song union t2 {
6*481d67d3SYonghong Song   int a;
7*481d67d3SYonghong Song   long b;
8*481d67d3SYonghong Song };
9*481d67d3SYonghong Song union t3 {
10*481d67d3SYonghong Song   struct {
11*481d67d3SYonghong Song     int a;
12*481d67d3SYonghong Song     long b;
13*481d67d3SYonghong Song   };
14*481d67d3SYonghong Song   long c;
15*481d67d3SYonghong Song };
16*481d67d3SYonghong Song union t4 {
17*481d67d3SYonghong Song   struct {
18*481d67d3SYonghong Song     long a;
19*481d67d3SYonghong Song     long b;
20*481d67d3SYonghong Song     long c;
21*481d67d3SYonghong Song   };
22*481d67d3SYonghong Song   long d;
23*481d67d3SYonghong Song };
24*481d67d3SYonghong Song 
foo1(union t1 arg1,union t2 arg2)25*481d67d3SYonghong Song int foo1(union t1 arg1, union t2 arg2) {
26*481d67d3SYonghong Song // CHECK: define dso_local i32 @foo1(i64 %arg2.coerce)
27*481d67d3SYonghong Song   return arg2.a;
28*481d67d3SYonghong Song }
29*481d67d3SYonghong Song 
foo2(union t3 arg1,union t4 arg2)30*481d67d3SYonghong Song int foo2(union t3 arg1, union t4 arg2) {
31*481d67d3SYonghong Song // CHECK: define dso_local i32 @foo2([2 x i64] %arg1.coerce, ptr noundef byval(%union.t4) align 8 %arg2)
32*481d67d3SYonghong Song   return arg1.a + arg2.a;
33*481d67d3SYonghong Song 
34*481d67d3SYonghong Song }
35*481d67d3SYonghong Song 
foo3(void)36*481d67d3SYonghong Song int foo3(void) {
37*481d67d3SYonghong Song   union t1 tmp1 = {};
38*481d67d3SYonghong Song   union t2 tmp2 = {};
39*481d67d3SYonghong Song   union t3 tmp3 = {};
40*481d67d3SYonghong Song   union t4 tmp4 = {};
41*481d67d3SYonghong Song   return foo1(tmp1, tmp2) + foo2(tmp3, tmp4);
42*481d67d3SYonghong Song // CHECK: call i32 @foo1(i64 %{{[a-zA-Z0-9]+}})
43*481d67d3SYonghong Song // CHECK: call i32 @foo2([2 x i64] %{{[a-zA-Z0-9]+}}, ptr noundef byval(%union.t4) align 8 %tmp4)
44*481d67d3SYonghong Song }
45