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