clang/test/CodeGen/variadic-null-win64.c

   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(ptr noundef %f)
  19 // WINDOWS: call void (ptr, ...) @v(ptr {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i64 noundef 0)
  20 // WINDOWS: call void @kr(ptr noundef {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 0)
  21 // LINUX: define{{.*}} void @f(ptr noundef %f)
  22 // LINUX: call void (ptr, ...) @v(ptr {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 0)
  23 // LINUX: call void (ptr, i32, i32, i32, i32, ...) @kr(ptr {{.*}}, i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 0)