diff --git a/compiler/rustc_codegen_ssa/src/back/link.rs b/compiler/rustc_codegen_ssa/src/back/link.rs index 59447e9de1350..c9a0ef841bbbe 100644 --- a/compiler/rustc_codegen_ssa/src/back/link.rs +++ b/compiler/rustc_codegen_ssa/src/back/link.rs @@ -1931,7 +1931,12 @@ fn add_order_independent_options( // Try to strip as much out of the generated object by removing unused // sections if possible. See more comments in linker.rs if !sess.link_dead_code() { - let keep_metadata = crate_type == CrateType::Dylib; + // If PGO is enabled sometimes gc_sections will remove the profile data section + // as it appears to be unused. This can then cause the PGO profile file to lose + // some functions. If we are generating a profile we shouldn't strip those metadata + // sections to ensure we have all the data for PGO. + let keep_metadata = + crate_type == CrateType::Dylib || sess.opts.cg.profile_generate.enabled(); cmd.gc_sections(keep_metadata); }