clang/test/CodeGen/enum.c

   1 // RUN: %clang_cc1 -triple i386-unknown-unknown %s -O3 -emit-llvm -o - | FileCheck -check-prefix=CHECK-C %s
   2 // RUN: %clang_cc1 -triple i386-unknown-unknown -x c++ %s -O3 -emit-llvm -o - | FileCheck -check-prefix=CHECK-CXX %s
   3 // CHECK-C: ret i32 6
   4 // CHECK-CXX: ret i32 7
   5
   6 // This test case illustrates a peculiarity of the promotion of
   7 // enumeration types in C and C++. In particular, the enumeration type
   8 // "z" below promotes to an unsigned int in C but int in C++.
   9 static enum { foo, bar = 1U } z;
  10
  11 int main (void)
  12 {
  13   int r = 0;
  14
  15   if (bar - 2 < 0)
  16     r += 4;
  17   if (foo - 1 < 0)
  18     r += 2;
  19   if (z - 1 < 0)
  20     r++;
  21
  22   return r;
  23 }