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Merge "Limit LTO inlining even when profile is present" into main

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Treehugger Robot
2023-08-02 22:27:04 +00:00
committed by Gerrit Code Review
parent cfe9e6d008 d6ab48c660
commit 3ff50d5854
1 changed files with 8 additions and 4 deletions
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12
cc/lto.go
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@@ -135,10 +135,14 @@ func (lto *lto) flags(ctx BaseModuleContext, flags Flags) Flags {
ltoLdFlags = append(ltoLdFlags, cachePolicyFormat+policy)
}
// If the module does not have a profile, be conservative and limit cross TU inline
// limit to 5 LLVM IR instructions, to balance binary size increase and performance.
if !ctx.Darwin() && !ctx.isPgoCompile() && !ctx.isAfdoCompile() {
ltoLdFlags = append(ltoLdFlags, "-Wl,-plugin-opt,-import-instr-limit=5")
// Reduce the inlining threshold for a better balance of binary size and
// performance.
if !ctx.Darwin() {
if ctx.isPgoCompile() || ctx.isAfdoCompile() {
ltoLdFlags = append(ltoLdFlags, "-Wl,-plugin-opt,-import-instr-limit=40")
} else {
ltoLdFlags = append(ltoLdFlags, "-Wl,-plugin-opt,-import-instr-limit=5")
}
}
flags.Local.CFlags = append(flags.Local.CFlags, ltoCFlags...)