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Merge "Revert^2 "Enable full LTO optimization by default"" into main am: 2590054333

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Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3009938

Change-Id: Ied3836f4504dcac15f0802285c2b9aba13918fae
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Yi Kong
2024-03-27 02:11:04 +00:00
committed by Automerger Merge Worker
parent 6dcbb6061c 2590054333
commit b086505b1c
1 changed files with 5 additions and 6 deletions
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11
cc/lto.go
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@@ -54,6 +54,9 @@ type LTOProperties struct {
// Use -fwhole-program-vtables cflag.
Whole_program_vtables *bool
// Use --lto-O0 flag.
Lto_O0 *bool
}
type lto struct {
@@ -106,12 +109,8 @@ func (lto *lto) flags(ctx ModuleContext, flags Flags) Flags {
ltoCFlags := []string{"-flto=thin", "-fsplit-lto-unit"}
var ltoLdFlags []string
// The module did not explicitly turn on LTO. Only leverage LTO's
// better dead code elimination and CFG simplification, but do
// not perform costly optimizations for a balance between compile
// time, binary size and performance.
// Apply the same for Eng builds as well.
if !lto.ThinLTO() || ctx.Config().Eng() {
// Do not perform costly LTO optimizations for Eng builds.
if Bool(lto.Properties.Lto_O0) || ctx.Config().Eng() {
ltoLdFlags = append(ltoLdFlags, "-Wl,--lto-O0")
}