clang/test/CodeGen/redefine_extname.c

   1 // RUN: %clang_cc1 -triple=i386-pc-solaris2.11 -w -emit-llvm %s -o - | FileCheck %s
   2
   3 #pragma redefine_extname fake real
   4 #pragma redefine_extname name alias
   5
   6 extern int fake(void);
   7
   8 int name;
   9
  10 // __PRAGMA_REDEFINE_EXTNAME should be defined.  This will fail if it isn't...
  11 int fish(void) { return fake() + __PRAGMA_REDEFINE_EXTNAME + name; }
  12 // Check that the call to fake() is emitted as a call to real()
  13 // CHECK:   call i32 @real()
  14 // Check that this also works with variables names
  15 // CHECK:   load i32, ptr @alias
  16
  17 // This is a case when redefenition is deferred *and* we have a local of the
  18 // same name. PR23923.
  19 #pragma redefine_extname foo bar
  20 int f(void) {
  21   int foo = 0;
  22   return foo;
  23 }
  24 extern int foo(void) { return 1; }
  25 // CHECK: define{{.*}} i32 @bar()
  26
  27 // Check that pragma redefine_extname applies to external declarations only.
  28 #pragma redefine_extname foo_static bar_static
  29 static int foo_static(void) { return 1; }
  30 int baz(void) { return foo_static(); }
  31 // CHECK-NOT: call i32 @bar_static()
  32
  33 // Check that pragma redefine_extname applies to builtin functions.
  34 typedef unsigned long size_t;
  35 extern void *memcpy(void *, const void *, size_t);
  36 #pragma redefine_extname memcpy __GI_memcpy
  37 void *test_memcpy(void *dst, const void *src, size_t n) { return memcpy(dst, src, n); }
  38 // CHECK: call ptr @__GI_memcpy(