xref: /aosp_15_r20/external/clang/test/CodeGen/attr-no-tail.c (revision 67e74705e28f6214e480b399dd47ea732279e315)
1*67e74705SXin Li // RUN: %clang_cc1 -triple x86_64-apple-macosx10.7.0 %s -emit-llvm -o - | FileCheck %s
2*67e74705SXin Li 
3*67e74705SXin Li // CHECK: %{{[a-z0-9]+}} = notail call i32 @callee0(i32 %
4*67e74705SXin Li // CHECK: %{{[a-z0-9]+}} = notail call i32 @callee1(i32 %
5*67e74705SXin Li 
6*67e74705SXin Li // Check that indirect calls do not have the notail marker.
7*67e74705SXin Li // CHECK: store i32 (i32)* @callee1, i32 (i32)** [[ALLOCA1:%[A-Za-z0-9]+]], align 8
8*67e74705SXin Li // CHECK: [[INDIRFUNC:%[0-9]+]] = load i32 (i32)*, i32 (i32)** [[ALLOCA1]], align 8
9*67e74705SXin Li // CHECK: %{{[a-z0-9]+}} = call i32 [[INDIRFUNC]](i32 %{{[0-9]+}}
10*67e74705SXin Li 
11*67e74705SXin Li // CHECK: %{{[a-z0-9]+}} = call i32 @callee2(i32 %
12*67e74705SXin Li 
callee0(int a)13*67e74705SXin Li int callee0(int a) __attribute__((not_tail_called)) {
14*67e74705SXin Li   return a + 1;
15*67e74705SXin Li }
16*67e74705SXin Li 
17*67e74705SXin Li int callee1(int) __attribute__((not_tail_called));
18*67e74705SXin Li 
19*67e74705SXin Li int callee2(int);
20*67e74705SXin Li 
21*67e74705SXin Li typedef int (*FuncTy)(int);
22*67e74705SXin Li 
foo0(int a)23*67e74705SXin Li int foo0(int a) {
24*67e74705SXin Li   if (a > 1)
25*67e74705SXin Li     return callee0(a);
26*67e74705SXin Li   if (a == 1)
27*67e74705SXin Li     return callee1(a);
28*67e74705SXin Li   if (a < 0) {
29*67e74705SXin Li     FuncTy F = callee1;
30*67e74705SXin Li     return (*F)(a);
31*67e74705SXin Li   }
32*67e74705SXin Li   return callee2(a);
33*67e74705SXin Li }
34