set default max-page-size to 4KB in lld for Android Aarch64
Summary:
This patch passes an option '-z max-page-size=4096' to lld through clang driver.
This is for Android on Aarch64 target.
The lld default page size is too large for Aarch64, which produces larger .so files and images for arm64 device targets.
In this patch we set default page size to 4KB for Android Aarch64 targets instead.
Reviewers: srhines, danalbert, ruiu, chh, peter.smith
Reviewed By: srhines
Subscribers: javed.absar, kristof.beyls, cfe-commits, george.burgess.iv, llozano
Differential Revision: https://reviews.llvm.org/D55029
llvm-svn: 347897
diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
index 79deb04..65ab9b2 100644
--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -247,6 +247,14 @@
ExtraOpts.push_back("relro");
}
+ // The lld default page size is too large for Aarch64, which produces much
+ // larger .so files and images for arm64 device targets. Use 4KB page size
+ // for Android arm64 targets instead.
+ if (Triple.isAArch64() && Triple.isAndroid()) {
+ ExtraOpts.push_back("-z");
+ ExtraOpts.push_back("max-page-size=4096");
+ }
+
if (GCCInstallation.getParentLibPath().find("opt/rh/devtoolset") !=
StringRef::npos)
// With devtoolset on RHEL, we want to add a bin directory that is relative