llvm/clang/test/CodeGen/array-init.c

// RUN: %clang_cc1 %s -O0 -triple x86_64-unknown-linux-gnu -emit-llvm -o - | FileCheck -check-prefix=CHECK-NO-MERGE-CONSTANTS %s
// RUN: %clang_cc1 %s -O0 -triple x86_64-unknown-linux-gnu -fmerge-all-constants -emit-llvm -o - | FileCheck -check-prefix=CHECK-MERGE-CONSTANTS %s

// CHECK-NO-MERGE-CONSTANTS: @{{.*}}.a1 = private unnamed_addr constant [5 x i32] [i32 0, i32 1, i32 2, i32 0, i32 0]

// CHECK-MERGE-CONSTANTS: @{{.*}}.a1 = internal constant [5 x i32] [i32 0, i32 1, i32 2, i32 0, i32 0]
// CHECK-MERGE-CONSTANTS: @{{.*}}.a2 = internal constant [5 x i32] zeroinitializer
// CHECK-MERGE-CONSTANTS: @{{.*}}.a3 = internal constant [5 x i32] zeroinitializer

void testConstArrayInits(void)
{
  const int a1[5] = {0,1,2};
  const int a2[5] = {0,0,0};
  const int a3[5] = {0};
}

/// https://github.com/llvm/llvm-project/issues/57353
// CHECK: @big_char ={{.*}} global <{ i8, [4294967295 x i8] }> <{ i8 1, [4294967295 x i8] zeroinitializer }>
char big_char[4294967296] = {1};

// CHECK: @big_char2 ={{.*}} global <{ i8, i8, [4294967296 x i8] }> <{ i8 1, i8 2, [4294967296 x i8] zeroinitializer }>
char big_char2[4294967298] = {1, 2};

// CHECK: @big_int ={{.*}} global <{ i32, i32, i32, [2147483647 x i32] }> <{ i32 1, i32 2, i32 3, [2147483645 x i32] zeroinitializer }>
int big_int[0x200000000 >> 2] = {1, 2, 3};