Summary:
r336838 allowed these to be toggleable.
r336858 reverted r336838.
r336943 made the generation of these sections conditional on LDPO_REL.
This commit brings back the toggle-ability. You can specify:
-plugin-opt=-function-sections
-plugin-opt=-data-sections
For your linker flags to disable the changes made in r336943.
Without toggling r336943 off, arm64 linux kernels linked with gold-plugin
see significant boot time regressions, but with r336943 outright reverted
x86_64 linux kernels linked with gold-plugin fail to boot.
Reviewers: pcc, void
Reviewed By: pcc
Subscribers: javed.absar, kristof.beyls, llvm-commits, srhines
Differential Revision: https://reviews.llvm.org/D55291
llvm-svn: 348389
Conf.Options.RelaxELFRelocations = false;
// Toggle function/data sections.
- Conf.Options.FunctionSections = SplitSections;
- Conf.Options.DataSections = SplitSections;
+ if (FunctionSections.getNumOccurrences() == 0)
+ Conf.Options.FunctionSections = SplitSections;
+ if (DataSections.getNumOccurrences() == 0)
+ Conf.Options.DataSections = SplitSections;
Conf.MAttrs = MAttrs;
Conf.RelocModel = RelocationModel;