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