1// Check the various ways in which the three classes of values
2// (scalar, complex, aggregate) interact with parameter passing
3// (function entry, function return, call argument, call result).
4//
5// We also check _Bool and empty structures, as these can have annoying
6// corner cases.
7
8// RUN: %clang_cc1 %s -triple i386-unknown-unknown -O3 -emit-llvm -o - | FileCheck %s
9// RUN: %clang_cc1 %s -triple x86_64-unknown-unknown -O3 -emit-llvm -o - | FileCheck %s
10// RUN: %clang_cc1 %s -triple powerpc-unknown-unknown -O3 -emit-llvm -o - | FileCheck %s
11// CHECK-NOT: @g0
12
13typedef _Bool BoolTy;
14typedef int ScalarTy;
15typedef _Complex int ComplexTy;
16typedef struct { int a, b, c; } AggrTy;
17typedef struct { int a[0]; } EmptyTy;
18
19static int result;
20
21static BoolTy bool_id(BoolTy a) { return a; }
22static AggrTy aggr_id(AggrTy a) { return a; }
23static EmptyTy empty_id(EmptyTy a) { return a; }
24static ScalarTy scalar_id(ScalarTy a) { return a; }
25static ComplexTy complex_id(ComplexTy a) { return a; }
26
27static void bool_mul(BoolTy a) { result *= a; }
28
29static void aggr_mul(AggrTy a) { result *= a.a * a.b * a.c; }
30
31static void empty_mul(EmptyTy a) { result *= 53; }
32
33static void scalar_mul(ScalarTy a) { result *= a; }
34
35static void complex_mul(ComplexTy a) { result *= __real a * __imag a; }
36
37extern void g0(void);
38
39void f0(void) {
40  result = 1;
41
42  bool_mul(bool_id(1));
43  aggr_mul(aggr_id((AggrTy) { 2, 3, 5}));
44  empty_mul(empty_id((EmptyTy) {}));
45  scalar_mul(scalar_id(7));
46  complex_mul(complex_id(11 + 13i));
47
48  // This call should be eliminated.
49  if (result != 2 * 3 * 5 * 7 * 11 * 13 * 53)
50    g0();
51}
52
53