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Commit f77913f0 authored by Pirama Arumuga Nainar's avatar Pirama Arumuga Nainar
Browse files

[rust] Switch LTO flavor to "thin" 

Bug: http://b/202032071

Thin LTO provides similar performance gains to full LTO but takes less
time during build.

Thin LTO also doesn't cause the error with `-C lto` and `-C
llvm-args=--runtime-counter-relocation` in b/202032071.

Test: presubmit
Test: verify b/202032071
Change-Id: Id5749aaea598d4b555a9d959ed753a312ae36f26
parent 85d72973

rust/builder.go

+3 −3
Original line number Diff line number Diff line
@@ -95,7 +95,7 @@ func init() { 


func TransformSrcToBinary(ctx ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,

	outputFile android.WritablePath) buildOutput {

	flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto")

	flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")



	return transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "bin")

}
@@ -112,13 +112,13 @@ func TransformSrctoDylib(ctx ModuleContext, mainSrc android.Path, deps PathDeps, 


func TransformSrctoStatic(ctx ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,

	outputFile android.WritablePath) buildOutput {

	flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto")

	flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")

	return transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "staticlib")

}



func TransformSrctoShared(ctx ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,

	outputFile android.WritablePath) buildOutput {

	flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto")

	flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")

	return transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "cdylib")

}