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Make -Zprofile set codegen-units to 1

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This commit is contained in:
Amanieu d'Antras 2020-04-17 19:53:31 +01:00
parent 8d67f576b5
commit 7fe41279c5
1 changed files with 11 additions and 1 deletions
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12
src/librustc_session/config.rs
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@ -1655,7 +1655,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
let output_types = parse_output_types(&debugging_opts, matches, error_format); let output_types = parse_output_types(&debugging_opts, matches, error_format);
let mut cg = build_codegen_options(matches, error_format); let mut cg = build_codegen_options(matches, error_format);
let (disable_thinlto, codegen_units) = should_override_cgus_and_disable_thinlto( let (disable_thinlto, mut codegen_units) = should_override_cgus_and_disable_thinlto(
&output_types, &output_types,
matches, matches,
error_format, error_format,
@ -1672,6 +1672,16 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
"can't instrument with gcov profiling when compiling incrementally", "can't instrument with gcov profiling when compiling incrementally",
); );
} }
if debugging_opts.profile {
match codegen_units {
Some(1) => {}
None => codegen_units = Some(1),
Some(_) => early_error(
error_format,
"can't instrument with gcov profiling with multiple codegen units",
),
}
}
if cg.profile_generate.enabled() && cg.profile_use.is_some() { if cg.profile_generate.enabled() && cg.profile_use.is_some() {
early_error( early_error(