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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 
     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