Differential D50478 Diff 166534 lldb/packages/Python/lldbsuite/test/functionalities/tail_call_frames/disambiguate_call_site/main.cpp

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				//===-- main.cpp ------------------------------------------------- C++ --===//
				//
				// The LLVM Compiler Infrastructure
				//
				// This file is distributed under the University of Illinois Open Source
				// License. See LICENSE.TXT for details.
				//
				//===----------------------------------------------------------------------===//

				volatile int x;

				void __attribute__((noinline)) sink() {
				x++; //% self.filecheck("bt", "main.cpp", "-implicit-check-not=artificial")
				// CHECK: frame #0: 0x{{[0-9a-f]+}} a.out`sink() at main.cpp:[[@LINE-1]]:4 [opt]
				// CHECK-NEXT: frame #1: 0x{{[0-9a-f]+}} a.out`func2{{.*}} [opt] [artificial]
				// CHECK-NEXT: frame #2: 0x{{[0-9a-f]+}} a.out`main{{.*}} [opt]
				}

				void __attribute__((noinline)) func2() {
				sink(); /* tail */
				}

				void __attribute__((noinline)) func1() { sink(); /* tail */ }

				int __attribute__((disable_tail_calls)) main(int argc, char **) {
				// The sequences `main -> f{1,2} -> sink` are both plausible. Test that
				// return-pc call site info allows lldb to pick the correct sequence.
				func2();
				if (argc == 100)
				func1();
				return 0;
				}