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| author | dim <dim@FreeBSD.org> | 2011-02-20 13:06:31 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2011-02-20 13:06:31 +0000 |
| commit | 39fcc9a984e2820e4ea0fa2ac4abd17d9f3a31df (patch) | |
| tree | a9243275843fbeaa590afc07ee888e006b8d54ea /test/CodeGen/pointer-signext.c | |
| parent | 69b4eca4a4255ba43baa5c1d9bbdec3ec17f479e (diff) | |
| download | FreeBSD-src-39fcc9a984e2820e4ea0fa2ac4abd17d9f3a31df.zip FreeBSD-src-39fcc9a984e2820e4ea0fa2ac4abd17d9f3a31df.tar.gz | |
Vendor import of clang trunk r126079:
http://llvm.org/svn/llvm-project/cfe/trunk@126079
Diffstat (limited to 'test/CodeGen/pointer-signext.c')
| -rw-r--r-- | test/CodeGen/pointer-signext.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/CodeGen/pointer-signext.c b/test/CodeGen/pointer-signext.c new file mode 100644 index 0000000..e809eff --- /dev/null +++ b/test/CodeGen/pointer-signext.c @@ -0,0 +1,32 @@ +// RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm -O2 -o - %s | FileCheck %s + +// Under Windows 64, int and long are 32-bits. Make sure pointer math doesn't +// cause any sign extensions. + +// CHECK: [[P:%.*]] = add i64 %param, -8 +// CHECK-NEXT: [[Q:%.*]] = inttoptr i64 [[P]] to [[R:%.*\*]] +// CHECK-NEXT: {{%.*}} = getelementptr inbounds [[R]] [[Q]], i64 0, i32 0 + +#define CR(Record, TYPE, Field) \ + ((TYPE *) ((unsigned char *) (Record) - (unsigned char *) &(((TYPE *) 0)->Field))) + +typedef struct _LIST_ENTRY { + struct _LIST_ENTRY *ForwardLink; + struct _LIST_ENTRY *BackLink; +} LIST_ENTRY; + +typedef struct { + unsigned long long Signature; + LIST_ENTRY Link; +} MEMORY_MAP; + +int test(unsigned long long param) +{ + LIST_ENTRY *Link; + MEMORY_MAP *Entry; + + Link = (LIST_ENTRY *) param; + + Entry = CR (Link, MEMORY_MAP, Link); + return (int) Entry->Signature; +} |
