| /* |
| * This file is used to test dsymutil support for call site entries with tail |
| * calls (DW_AT_call_pc). |
| * |
| * Instructions for regenerating binaries (on Darwin/x86_64): |
| * |
| * 1. Copy the source to a top-level directory to work around having absolute |
| * paths in the symtab's OSO entries. |
| * |
| * mkdir -p /Inputs/ && cp tail-call.c /Inputs && cd /Inputs |
| * |
| * 2. Compile with call site info enabled. -O2 is used to get tail call |
| * promotion. |
| * |
| * clang -g -O2 tail-call.c -c -o tail-call.macho.x86_64.o |
| * clang tail-call.macho.x86_64.o -o tail-call.macho.x86_64 |
| * |
| * 3. Copy the binaries back into the repo's Inputs directory. You'll need |
| * -oso-prepend-path=%p to link. |
| */ |
| |
| volatile int x; |
| |
| __attribute__((disable_tail_calls, noinline)) void func2() { x++; } |
| |
| __attribute__((noinline)) void func1() { func2(); /* tail */ } |
| |
| __attribute__((disable_tail_calls)) int main() { func1(); /* regular */ } |