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Commit cb89f96b authored by Yi Kong's avatar Yi Kong Committed by Automerger Merge Worker
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Merge "Tweak ThinLTO inling heuristics in absense of PGO profile" am:... 

Merge "Tweak ThinLTO inling heuristics in absense of PGO profile" am: 76a5ba81 am: 280fdb96 am: 5499f46e

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1433954

Change-Id: If62040ff341ee2856217978a2fd636dc98f4a66d
parents 6033ba14 5499f46e

cc/lto.go

+3 −4
Original line number Diff line number Diff line
@@ -117,12 +117,11 @@ func (lto *lto) flags(ctx BaseModuleContext, flags Flags) Flags { 
			flags.Local.LdFlags = append(flags.Local.LdFlags, cachePolicyFormat+policy)

		}



		// If the module does not have a profile, be conservative and do not inline

		// or unroll loops during LTO, in order to prevent significant size bloat.

		// 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.isPgoCompile() {

			flags.Local.LdFlags = append(flags.Local.LdFlags,

				"-Wl,-plugin-opt,-inline-threshold=0",

				"-Wl,-plugin-opt,-unroll-threshold=0")

				"-Wl,-plugin-opt,-import-instr-limit=5")

		}

	}

	return flags