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-rw-r--r--lib/Frontend/RewriteObjC.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Frontend/RewriteObjC.cpp b/lib/Frontend/RewriteObjC.cpp
index 98dee264e9..a13bccbb91 100644
--- a/lib/Frontend/RewriteObjC.cpp
+++ b/lib/Frontend/RewriteObjC.cpp
@@ -640,7 +640,9 @@ void RewriteObjC::Initialize(ASTContext &context) {
Preamble += "#define __block\n";
Preamble += "#define __weak\n";
}
- Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long) &((TYPE *)0)->MEMBER)\n";
+ // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
+ // as this avoids warning in any 64bit/32bit compilation model.
+ Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
}