1 // RUN: %clang_cc1 %s -emit-llvm -o - -triple x86_64-windows-msvc | FileCheck %s --check-prefix=WINDOWS 2 // RUN: %clang_cc1 %s -emit-llvm -o - -triple x86_64-linux | FileCheck %s --check-prefix=LINUX 3 4 // Make it possible to pass NULL through variadic functions on platforms where 5 // NULL has an integer type that is more narrow than a pointer. On such 6 // platforms we widen null pointer constants passed to variadic functions to a 7 // pointer-sized integer. We don't apply this special case to K&R-style 8 // unprototyped functions, because MSVC doesn't either. 9 10 #define NULL 0 11 12 void v(const char *f, ...); 13 void kr(); 14 void f(const char *f) { 15 v(f, 1, 2, 3, NULL); 16 kr(f, 1, 2, 3, 0); 17 } 18 // WINDOWS: define dso_local void @f(i8* noundef %f) 19 // WINDOWS: call void (i8*, ...) @v(i8* {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i64 noundef 0) 20 // WINDOWS: call void bitcast (void (...)* @kr to void (i8*, i32, i32, i32, i32)*)(i8* noundef {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 0) 21 // LINUX: define{{.*}} void @f(i8* noundef %f) 22 // LINUX: call void (i8*, ...) @v(i8* {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 0) 23 // LINUX: call void (i8*, i32, i32, i32, i32, ...) bitcast (void (...)* @kr to void (i8*, i32, i32, i32, i32, ...)*)(i8* {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 0) 24