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[ELF] Slightly speed up -z keep-text-section-prefix

This commit is contained in:
Fangrui Song 2021-12-15 10:20:10 -08:00
parent d87e617048
commit 3534d26cc1
1 changed files with 9 additions and 6 deletions
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15
lld/ELF/LinkerScript.cpp
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@ -94,14 +94,17 @@ static StringRef getOutputSectionName(const InputSectionBase *s) {
// cold parts in .text.split instead of .text.unlikely mitigates against poor
// profile inaccuracy. Techniques such as hugepage remapping can make
// conservative decisions at the section granularity.
if (config->zKeepTextSectionPrefix && s->name.startswith(".text."))
for (StringRef v : {".text.hot", ".text.unknown", ".text.unlikely",
".text.startup", ".text.exit", ".text.split"})
if (isSectionPrefix(v, s->name))
return v;
if (isSectionPrefix(".text", s->name)) {
if (config->zKeepTextSectionPrefix)
for (StringRef v : {".text.hot", ".text.unknown", ".text.unlikely",
".text.startup", ".text.exit", ".text.split"})
if (isSectionPrefix(v.substr(5), s->name.substr(5)))
return v;
return ".text";
}
for (StringRef v :
{".text", ".data.rel.ro", ".data", ".rodata", ".bss.rel.ro", ".bss",
{".data.rel.ro", ".data", ".rodata", ".bss.rel.ro", ".bss",
".gcc_except_table", ".init_array", ".fini_array", ".tbss", ".tdata",
".ARM.exidx", ".ARM.extab", ".ctors", ".dtors"})
if (isSectionPrefix(v, s->name))