Handle clang-specific PGO flags

src/compiler/clang.rs

@@ -81,7 +81,7 @@ impl CCompilerImpl for Clang {
     }
 }
 
-pub static ARGS: [ArgInfo<gcc::ArgData>; 8] = [
+pub static ARGS: [ArgInfo<gcc::ArgData>; 10] = [
     take_arg!("--serialize-diagnostics", OsString, Separated, PassThrough),
     take_arg!("--target", OsString, Separated, PassThrough),
     // TODO: should be extracted and reprocessed, though bear in mind some
@@ -89,6 +89,9 @@ pub static ARGS: [ArgInfo<gcc::ArgData>; 8] = [
     take_arg!("-Xclang", OsString, Separated, TooHard),
     flag!("-fcxx-modules", TooHardFlag),
     flag!("-fmodules", TooHardFlag),
+    flag!("-fprofile-instr-generate", ProfileGenerate),
+    // Can be either -fprofile-instr-use or -fprofile-instr-use=path
+    take_arg!("-fprofile-instr-use", OsString, Concatenated, TooHard),
     take_arg!("-gcc-toolchain", OsString, Separated, PassThrough),
     take_arg!("-include-pch", PathBuf, CanBeSeparated, PreprocessorArgumentPath),
     take_arg!("-target", OsString, Separated, PassThrough),