llvm-project/clang/test/CodeGen/alias.c

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// RUN: clang -triple i386-pc-linux-gnu -emit-llvm -o %t %s &&
// RUN: grep '@g0 = common global i32 0' %t &&
// RUN: grep '@f1 = alias void ()\* @f0' %t &&
// RUN: grep '@g1 = alias i32\* @g0' %t &&
// RUN: grep 'define void @f0() nounwind {' %t
void f0(void) { }
extern void f1(void);
extern void f1(void) __attribute((alias("f0")));
int g0;
extern int g1;
extern int g1 __attribute((alias("g0")));