| 1 | // RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm -O2 -o - %s | FileCheck %s |
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| 2 | |
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| 3 | // Under Windows 64, int and long are 32-bits. Make sure pointer math doesn't |
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| 4 | // cause any sign extensions. |
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| 5 | |
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| 6 | // CHECK: [[P:%.*]] = add i64 %param, -8 |
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| 7 | // CHECK-NEXT: [[Q:%.*]] = inttoptr i64 [[P]] to [[R:%.*]]* |
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| 8 | // CHECK-NEXT: {{%.*}} = getelementptr inbounds [[R]], [[R]]* [[Q]], i64 0, i32 0 |
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| 9 | |
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| 10 | #define CR(Record, TYPE, Field) \ |
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| 11 | ((TYPE *) ((unsigned char *) (Record) - (unsigned char *) &(((TYPE *) 0)->Field))) |
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| 12 | |
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| 13 | typedef struct _LIST_ENTRY { |
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| 14 | struct _LIST_ENTRY *ForwardLink; |
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| 15 | struct _LIST_ENTRY *BackLink; |
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| 16 | } LIST_ENTRY; |
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| 17 | |
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| 18 | typedef struct { |
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| 19 | unsigned long long Signature; |
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| 20 | LIST_ENTRY Link; |
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| 21 | } MEMORY_MAP; |
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| 22 | |
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| 23 | int test(unsigned long long param) |
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| 24 | { |
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| 25 | LIST_ENTRY *Link; |
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| 26 | MEMORY_MAP *Entry; |
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| 27 | |
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| 28 | Link = (LIST_ENTRY *) param; |
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| 29 | |
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| 30 | Entry = CR (Link, MEMORY_MAP, Link); |
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| 31 | return (int) Entry->Signature; |
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| 32 | } |
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| 33 | |
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