TheRock/compiler/amd-llvm/clang/test/CIR/Lowering/array.cpp

// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o %t-cir.ll
// RUN: FileCheck --input-file=%t-cir.ll %s

// CHECK-DAG: @[[FUNC2_ARR:.*]] = private constant [2 x i32] [i32 5, i32 0]
// CHECK-DAG: @[[FUNC3_ARR:.*]] = private constant [2 x i32] [i32 5, i32 6]
// CHECK-DAG: @[[FUNC4_ARR:.*]] = private constant [2 x [1 x i32]] {{.*}}[1 x i32] [i32 5], [1 x i32] [i32 6]{{.*}}
// CHECK-DAG: @[[FUNC5_ARR:.*]] = private constant [2 x [1 x i32]] {{.*}}[1 x i32] [i32 5], [1 x i32] zeroinitializer{{.*}}
// CHECK-DAG: @[[FUNC7_ARR:.*]] = private constant [1 x ptr] zeroinitializer

int a[10];
// CHECK: @a = global [10 x i32] zeroinitializer

int aa[10][5];
// CHECK: @aa = global [10 x [5 x i32]] zeroinitializer

int c[10] = {};
// CHECK: @c = global [10 x i32] zeroinitializer

int d[3] = {1, 2, 3};
// CHECK: @d = global [3 x i32] [i32 1, i32 2, i32 3]

int dd[3][2] = {{1, 2}, {3, 4}, {5, 6}};
// CHECK: @dd = global [3 x [2 x i32]] [
// CHECK: [2 x i32] [i32 1, i32 2], [2 x i32]
// CHECK: [i32 3, i32 4], [2 x i32] [i32 5, i32 6]]

int e[10] = {1, 2};
// CHECK: @e = global <{ i32, i32, [8 x i32] }> <{ i32 1, i32 2, [8 x i32] zeroinitializer }>

int f[5] = {1, 2};
// CHECK: @f = global [5 x i32] [i32 1, i32 2, i32 0, i32 0, i32 0]

extern int b[10];
// CHECK: @b = external global [10 x i32]

extern int bb[10][5];
// CHECK: @bb = external global [10 x [5 x i32]]

// This function is only here to make sure the external globals are emitted.
void reference_externs() {
  b;
  bb;
}

void func() {
  int arr[10];
  int e = arr[0];
  int e2 = arr[1];
}
// CHECK: define{{.*}} void @_Z4funcv()
// CHECK-NEXT: %[[ARR_ALLOCA:.*]] = alloca [10 x i32], i64 1, align 16
// CHECK-NEXT: %[[INIT:.*]] = alloca i32, i64 1, align 4
// CHECK-NEXT: %[[INIT_2:.*]] = alloca i32, i64 1, align 4
// CHECK-NEXT: %[[ELE_PTR:.*]] = getelementptr [10 x i32], ptr %[[ARR_ALLOCA]], i32 0, i64 0
// CHECK-NEXT: %[[TMP:.*]] = load i32, ptr %[[ELE_PTR]], align 16
// CHECK-NEXT: store i32 %[[TMP]], ptr %[[INIT]], align 4
// CHECK-NEXT: %[[ELE_PTR:.*]] = getelementptr [10 x i32], ptr %[[ARR_ALLOCA]], i32 0, i64 1
// CHECK-NEXT: %[[TMP:.*]] = load i32, ptr %[[ELE_PTR]], align 4
// CHECK-NEXT: store i32 %[[TMP]], ptr %[[INIT_2]], align 4

void func2() {
  int arr[2] = {5};
}

// CHECK: define{{.*}} void @_Z5func2v()
// CHECK:   %[[ARR:.*]] = alloca [2 x i32], i64 1, align 4
// CHECK:   call void @llvm.memcpy{{.*}}(ptr %[[ARR]], ptr @[[FUNC2_ARR]], i64 8, i1 false)
// CHECK:   ret void

void func3() {
  int arr3[2] = {5, 6};
}
// CHECK: define{{.*}} void @_Z5func3v()
// CHECK:  %[[ARR_ALLOCA:.*]] = alloca [2 x i32], i64 1, align 4
// CHECK:  call void @llvm.memcpy{{.*}}(ptr %[[ARR_ALLOCA]], ptr @[[FUNC3_ARR]], i64 8, i1 false)

void func4() {
  int arr[2][1] = {{5}, {6}};
  int e = arr[1][0];
}
// CHECK: define{{.*}} void @_Z5func4v()
// CHECK:  %[[ARR_ALLOCA:.*]] = alloca [2 x [1 x i32]], i64 1, align 4
// CHECK:  %[[INIT:.*]] = alloca i32, i64 1, align 4
// CHECK:  call void @llvm.memcpy{{.*}}(ptr %[[ARR_ALLOCA]], ptr @[[FUNC4_ARR]], i64 8, i1 false)
// CHECK:  %[[ARR_1:.*]] = getelementptr [2 x [1 x i32]], ptr %[[ARR_ALLOCA]], i32 0, i64 1
// CHECK:  %[[ELE_PTR:.*]] = getelementptr [1 x i32], ptr %[[ARR_1]], i32 0, i64 0
// CHECK:  %[[TMP:.*]] = load i32, ptr %[[ELE_PTR]], align 4
// CHECK:  store i32 %[[TMP]], ptr %[[INIT]], align 4

void func5() {
  int arr[2][1] = {{5}};
}
// CHECK: define{{.*}} void @_Z5func5v()
// CHECK:   %[[ARR:.*]] = alloca [2 x [1 x i32]], i64 1, align 4
// CHECK:   call void @llvm.memcpy{{.*}}(ptr %[[ARR]], ptr @[[FUNC5_ARR]], i64 8, i1 false)
// CHECK:   ret void

void func6() {
  int x = 4;
  int arr[2] = { x, 5 };
}
// CHECK: define{{.*}} void @_Z5func6v()
// CHECK:  %[[VAR:.*]] = alloca i32, i64 1, align 4
// CHECK:  %[[ARR:.*]] = alloca [2 x i32], i64 1, align 4
// CHECK:  store i32 4, ptr %[[VAR]], align 4
// CHECK:  %[[ELE_0:.*]] = getelementptr i32, ptr %[[ARR]], i32 0
// CHECK:  %[[TMP:.*]] = load i32, ptr %[[VAR]], align 4
// CHECK:  store i32 %[[TMP]], ptr %[[ELE_0]], align 4
// CHECK:  %[[ELE_1:.*]] = getelementptr i32, ptr %[[ELE_0]], i64 1
// CHECK:  store i32 5, ptr %[[ELE_1]], align 4

void func7() {
  int* arr[1] = {};
}
// CHECK: define{{.*}} void @_Z5func7v()
// CHECK:   %[[ARR:.*]] = alloca [1 x ptr], i64 1, align 8
// CHECK:   call void @llvm.memcpy{{.*}}(ptr %[[ARR]], ptr @[[FUNC7_ARR]], i64 8, i1 false)
// CHECK:   ret void

void func8(int p[10]) {}
// CHECK: define{{.*}} void @_Z5func8Pi(ptr noundef {{%.*}})
// CHECK-NEXT: alloca ptr, i64 1, align 8

void func9(int pp[10][5]) {}
// CHECK: define{{.*}} void @_Z5func9PA5_i(ptr noundef {{%.*}})
// CHECK-NEXT: alloca ptr, i64 1, align 8