clang/test/CodeGen/init-memset.c

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -O0 -emit-llvm -o - %s | FileCheck %s
   2
   3 void use(void *);
   4
   5 void test_small(void) {
   6   // CHECK-LABEL: define{{.*}} void @test_small()
   7   int a[] = {1, 2, 3, 4};
   8   // CHECK: call void @llvm.memcpy.{{.*}}
   9   use(a);
  10 }
  11
  12 void test_small_same(void) {
  13   // CHECK-LABEL: define{{.*}} void @test_small_same()
  14   char a[] = {'a', 'a', 'a', 'a'};
  15   // CHECK: call void @llvm.memcpy.{{.*}}
  16   use(a);
  17 }
  18
  19 void test_different(void) {
  20   // CHECK-LABEL: define{{.*}} void @test_different()
  21   int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
  22   // CHECK: call void @llvm.memcpy.{{.*}}
  23   use(a);
  24 }
  25
  26 void test_all_zeros(void) {
  27   // CHECK-LABEL: define{{.*}} void @test_all_zeros()
  28   int a[16] = {};
  29   // CHECK: call void @llvm.memset.{{.*}}
  30   use(a);
  31 }
  32
  33 void test_all_a(void) {
  34   // CHECK-LABEL: define{{.*}} void @test_all_a()
  35   char a[] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
  36   // CHECK: call void @llvm.memcpy.{{.*}}
  37   use(a);
  38 }
  39
  40 void test_most_zeros(void) {
  41   // CHECK-LABEL: define{{.*}} void @test_most_zeros()
  42   int a[16] = {0, 0, 1};
  43   // CHECK: call void @llvm.memset.{{.*}}
  44   // CHECK: store i32 1
  45   use(a);
  46 }
  47
  48 void test_most_a(void) {
  49   // CHECK-LABEL: define{{.*}} void @test_most_a()
  50   char a[] = "aaaaazaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
  51   // CHECK: call void @llvm.memcpy.{{.*}}
  52   use(a);
  53 }
  54
  55 void test_pointers(void) {
  56   // CHECK-LABEL: define{{.*}} void @test_pointers()
  57   void *a[] = {&use, &use, &use, &use, &use, &use};
  58   // CHECK: call void @llvm.memcpy.{{.*}}
  59   use(a);
  60 }