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1 // RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm -O2 -o - %s | FileCheck %s
2 
3 // Under Windows 64, int and long are 32-bits.  Make sure pointer math doesn't
4 // cause any sign extensions.
5 
6 // CHECK:      [[P:%.*]] = add i64 %param, -8
7 // CHECK-NEXT: [[Q:%.*]] = inttoptr i64 [[P]] to [[R:%.*\*]]
8 // CHECK-NEXT: {{%.*}} = getelementptr inbounds [[R]] [[Q]], i64 0, i32 0
9 
10 #define CR(Record, TYPE, Field) \
11   ((TYPE *) ((unsigned char *) (Record) - (unsigned char *) &(((TYPE *) 0)->Field)))
12 
13 typedef struct _LIST_ENTRY {
14   struct _LIST_ENTRY  *ForwardLink;
15   struct _LIST_ENTRY  *BackLink;
16 } LIST_ENTRY;
17 
18 typedef struct {
19   unsigned long long    Signature;
20   LIST_ENTRY            Link;
21 } MEMORY_MAP;
22 
test(unsigned long long param)23 int 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