rust/tests/ui/feature-gates/feature-gate-profiler-runtime.rs

#![profiler_runtime] //~ ERROR the `#[profiler_runtime]` attribute is

fn main() {}
Add profiling support, through the rustc -Z profile flag. When -Z profile is passed, the GCDAProfiling LLVM pass is added to the pipeline, which uses debug information to instrument the IR. After compiling with -Z profile, the $(OUT_DIR)/$(CRATE_NAME).gcno file is created, containing initial profiling information. After running the program built, the $(OUT_DIR)/$(CRATE_NAME).gcda file is created, containing branch counters. The created .gcno and .gcda files can be processed using the "llvm-cov gcov" and "lcov" tools. The profiling data LLVM generates does not faithfully follow the GCC's format for .gcno and .gcda files, and so it will probably not work with other tools (such as gcov itself) that consume these files. 2017-02-13 03:57:50 -06:00			#![profiler_runtime] //~ ERROR the `#[profiler_runtime]` attribute is

			`fn main() {}`