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//===-- main.cpp ------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
volatile int x;
void __attribute__((noinline)) sink2() {
x++; //% self.filecheck("bt", "main.cpp", "-check-prefix=FROM-FUNC1")
// FROM-FUNC1: frame #0: 0x{{[0-9a-f]+}} a.out`sink{{.*}} at main.cpp:[[@LINE-1]]:{{.*}} [opt]
// FROM-FUNC1-NEXT: sink({{.*}} [opt]
// FROM-FUNC1-NEXT: func1{{.*}} [opt] [artificial]
// FROM-FUNC1-NEXT: main{{.*}} [opt]
}
void __attribute__((noinline)) sink(bool called_from_main) {
if (called_from_main) {
x++; //% self.filecheck("bt", "main.cpp", "-check-prefix=FROM-MAIN")
// FROM-MAIN: frame #0: 0x{{[0-9a-f]+}} a.out`sink{{.*}} at main.cpp:[[@LINE-1]]:{{.*}} [opt]
// FROM-MAIN-NEXT: main{{.*}} [opt]
} else {
sink2();
}
}
void __attribute__((noinline)) func1() { sink(false); /* tail */ }
int __attribute__((disable_tail_calls)) main(int argc, char **) {
// When func1 tail-calls sink, make sure that the former appears in the
// backtrace.
sink(true);
func1();
return 0;
}
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