33 lines · c
1// RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm -O2 -o - %s | FileCheck %s2 3// Under Windows 64, int and long are 32-bits. Make sure pointer math doesn't4// cause any sign extensions.5 6// CHECK: [[P:%.*]] = add i64 %param, -87// CHECK-NEXT: [[Q:%.*]] = inttoptr i64 [[P]] to ptr8// CHECK-NEXT: load i64, ptr [[Q]]9 10#define CR(Record, TYPE, Field) \11 ((TYPE *) ((unsigned char *) (Record) - (unsigned char *) &(((TYPE *) 0)->Field)))12 13typedef struct _LIST_ENTRY {14 struct _LIST_ENTRY *ForwardLink;15 struct _LIST_ENTRY *BackLink;16} LIST_ENTRY;17 18typedef struct {19 unsigned long long Signature;20 LIST_ENTRY Link;21} MEMORY_MAP;22 23int test(unsigned long long param)24{25 LIST_ENTRY *Link;26 MEMORY_MAP *Entry;27 28 Link = (LIST_ENTRY *) param;29 30 Entry = CR (Link, MEMORY_MAP, Link);31 return (int) Entry->Signature;32}33