clang/test/CodeGen/alloc-size-fnptr.c

   1 // Check that the alloc_size attribute is propagated to the call instruction
   2 // for both direct and indirect calls
   3 // RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm %s -o - 2>&1 | FileCheck %s
   4
   5 #define NULL ((void *)0)
   6
   7 int gi;
   8
   9 typedef unsigned long size_t;
  10
  11 extern void *my_malloc(int) __attribute__((alloc_size(1)));
  12 extern void *my_calloc(int, int) __attribute__((alloc_size(1, 2)));
  13
  14 // CHECK-LABEL: @call_direct
  15 void call_direct(void) {
  16   my_malloc(50);
  17   // CHECK: call ptr @my_malloc(i32 noundef 50) [[DIRECT_MALLOC_ATTR:#[0-9]+]]
  18   my_calloc(1, 16);
  19   // CHECK: call ptr @my_calloc(i32 noundef 1, i32 noundef 16) [[DIRECT_CALLOC_ATTR:#[0-9]+]]
  20 }
  21
  22 extern void *(*malloc_function_pointer)(void *, int)__attribute__((alloc_size(2)));
  23 extern void *(*calloc_function_pointer)(void *, int, int)__attribute__((alloc_size(2, 3)));
  24
  25 // CHECK-LABEL: @call_function_pointer
  26 void call_function_pointer(void) {
  27   malloc_function_pointer(NULL, 100);
  28   // CHECK: [[MALLOC_FN_PTR:%.+]] = load ptr, ptr @malloc_function_pointer, align 8
  29   // CHECK: call ptr [[MALLOC_FN_PTR]](ptr noundef null, i32 noundef 100) [[INDIRECT_MALLOC_ATTR:#[0-9]+]]
  30   calloc_function_pointer(NULL, 2, 4);
  31   // CHECK: [[CALLOC_FN_PTR:%.+]] = load ptr, ptr @calloc_function_pointer, align 8
  32   // CHECK: call ptr [[CALLOC_FN_PTR]](ptr noundef null, i32 noundef 2, i32 noundef 4) [[INDIRECT_CALLOC_ATTR:#[0-9]+]]
  33 }
  34
  35 typedef void *(__attribute__((alloc_size(3))) * my_malloc_fn_pointer_type)(void *, void *, int);
  36 typedef void *(__attribute__((alloc_size(3, 4))) * my_calloc_fn_pointer_type)(void *, void *, int, int);
  37 extern my_malloc_fn_pointer_type malloc_function_pointer_with_typedef;
  38 extern my_calloc_fn_pointer_type calloc_function_pointer_with_typedef;
  39
  40 // CHECK-LABEL: @call_function_pointer_typedef
  41 void call_function_pointer_typedef(void) {
  42   malloc_function_pointer_with_typedef(NULL, NULL, 200);
  43   // CHECK: [[INDIRECT_TYPEDEF_MALLOC_FN_PTR:%.+]] = load ptr, ptr @malloc_function_pointer_with_typedef, align 8
  44   // CHECK: call ptr [[INDIRECT_TYPEDEF_MALLOC_FN_PTR]](ptr noundef null, ptr noundef null, i32 noundef 200) [[INDIRECT_TYPEDEF_MALLOC_ATTR:#[0-9]+]]
  45   calloc_function_pointer_with_typedef(NULL, NULL, 8, 4);
  46   // CHECK: [[INDIRECT_TYPEDEF_CALLOC_FN_PTR:%.+]] = load ptr, ptr @calloc_function_pointer_with_typedef, align 8
  47   // CHECK: call ptr [[INDIRECT_TYPEDEF_CALLOC_FN_PTR]](ptr noundef null, ptr noundef null, i32 noundef 8, i32 noundef 4) [[INDIRECT_TYPEDEF_CALLOC_ATTR:#[0-9]+]]
  48 }
  49
  50 // CHECK: attributes [[DIRECT_MALLOC_ATTR]] = { allocsize(0) }
  51 // CHECK: attributes [[DIRECT_CALLOC_ATTR]] = { allocsize(0,1) }
  52 // CHECK: attributes [[INDIRECT_MALLOC_ATTR]] = { allocsize(1) }
  53 // CHECK: attributes [[INDIRECT_CALLOC_ATTR]] = { allocsize(1,2) }
  54 // CHECK: attributes [[INDIRECT_TYPEDEF_MALLOC_ATTR]] = { allocsize(2) }
  55 // CHECK: attributes [[INDIRECT_TYPEDEF_CALLOC_ATTR]] = { allocsize(2,3) }