alias.c revision 6bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89 
1// RUN: %clang_cc1 -triple i386-pc-linux-gnu -emit-llvm -o - %s | FileCheck -check-prefix=CHECKBASIC %s
2// RUN: %clang_cc1 -triple armv7a-eabi -mfloat-abi hard -emit-llvm -o - %s | FileCheck -check-prefix=CHECKCC %s
3
4int g0;
5// CHECKBASIC: @g0 = common global i32 0
6static int bar1 = 42;
7// CHECKBASIC: @bar1 = internal global i32 42
8
9extern int g1;
10extern int g1 __attribute((alias("g0")));
11// CHECKBASIC-DAG: @g1 = alias i32* @g0
12
13void f0(void) { }
14extern void f1(void);
15extern void f1(void) __attribute((alias("f0")));
16// CHECKBASIC-DAG: @f1 = alias void ()* @f0
17// CHECKBASIC-DAG: @test8_foo = alias weak void (...), void ()* @test8_bar
18// CHECKBASIC-DAG: @test8_zed = alias void (...), void ()* @test8_bar
19// CHECKBASIC-DAG: @test9_zed = alias void ()* @test9_bar
20// CHECKBASIC: define void @f0() [[NUW:#[0-9]+]] {
21
22// Make sure that aliases cause referenced values to be emitted.
23// PR3200
24static inline int foo1() { return 0; }
25// CHECKBASIC-LABEL: define internal i32 @foo1()
26int foo() __attribute__((alias("foo1")));
27int bar() __attribute__((alias("bar1")));
28
29extern int test6();
30void test7() { test6(); }  // test6 is emitted as extern.
31
32// test6 changes to alias.
33int test6() __attribute__((alias("test7")));
34
35static int inner(int a) { return 0; }
36static int inner_weak(int a) { return 0; }
37extern __typeof(inner) inner_a __attribute__((alias("inner")));
38static __typeof(inner_weak) inner_weak_a __attribute__((weakref, alias("inner_weak")));
39// CHECKCC: @inner_a = alias i32 (i32)* @inner
40// CHECKCC: define internal arm_aapcs_vfpcc i32 @inner(i32 %a) [[NUW:#[0-9]+]] {
41
42int outer(int a) { return inner(a); }
43// CHECKCC: define arm_aapcs_vfpcc i32 @outer(i32 %a) [[NUW]] {
44// CHECKCC: call arm_aapcs_vfpcc  i32 @inner(i32 %{{.*}})
45
46int outer_weak(int a) { return inner_weak_a(a); }
47// CHECKCC: define arm_aapcs_vfpcc i32 @outer_weak(i32 %a) [[NUW]] {
48// CHECKCC: call arm_aapcs_vfpcc  i32 @inner_weak(i32 %{{.*}})
49// CHECKCC: define internal arm_aapcs_vfpcc i32 @inner_weak(i32 %a) [[NUW]] {
50
51// CHECKBASIC: attributes [[NUW]] = { nounwind{{.*}} }
52
53// CHECKCC: attributes [[NUW]] = { nounwind{{.*}} }
54
55void test8_bar() {}
56void test8_foo() __attribute__((weak, alias("test8_bar")));
57void test8_zed() __attribute__((alias("test8_foo")));
58
59void test9_bar(void) { }
60void test9_zed(void) __attribute__((section("test")));
61void test9_zed(void) __attribute__((alias("test9_bar")));
62