https://github.com/tianleliu created
https://github.com/llvm/llvm-project/pull/127442
SPGO in lto mode, linker needs -lto-sample-profile option to set sample profile
file. Linux adds this option by transfering fprofile-sample-use but lld-link on
Windows misses the transfering. So add it now.
>From ad4d2857220e5e5b31cd66a79eac7d8dca438864 Mon Sep 17 00:00:00 2001
From: tianleli <tianle.l....@intel.com>
Date: Mon, 17 Feb 2025 11:24:10 +0800
Subject: [PATCH] [SPGO][Driver] Add lto-sample-profile option for lld-link
SPGO in lto mode, linker needs -lto-sample-profile option to set
sample profile file. Linux adds this option by transfering
fprofile-sample-use but lld-link on Windows misses the transfering.
So add it now.
---
clang/lib/Driver/ToolChains/MSVC.cpp | 3 +++
clang/test/Driver/cl-link.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/clang/lib/Driver/ToolChains/MSVC.cpp
b/clang/lib/Driver/ToolChains/MSVC.cpp
index bae41fc06c036..1c6854e3ef775 100644
--- a/clang/lib/Driver/ToolChains/MSVC.cpp
+++ b/clang/lib/Driver/ToolChains/MSVC.cpp
@@ -232,6 +232,9 @@ void visualstudio::Linker::ConstructJob(Compilation &C,
const JobAction &JA,
}
}
+ if (Arg *A = Args.getLastArg(options::OPT_fprofile_sample_use_EQ))
+ CmdArgs.push_back(Args.MakeArgString(std::string("-lto-sample-profile:") +
+ A->getValue()));
Args.AddAllArgValues(CmdArgs, options::OPT__SLASH_link);
// Control Flow Guard checks
diff --git a/clang/test/Driver/cl-link.c b/clang/test/Driver/cl-link.c
index 9bf8a8137926d..f1097ad0be9bf 100644
--- a/clang/test/Driver/cl-link.c
+++ b/clang/test/Driver/cl-link.c
@@ -71,3 +71,6 @@
// RUN: %clang_cl -m32 -arch:IA32 --target=i386-pc-win32 /Tc%s -fuse-ld=lld
-### -fsanitize=address 2>&1 | FileCheck --check-prefix=INFER-LLD %s
// INFER-LLD: lld-link
// INFER-LLD-NOT: INFERASANLIBS
+
+// RUN: %clang_cl --target=x86_64-unknown-windows-msvc -fuse-ld=lld -### -S
-fprofile-sample-use=%S/Inputs/file.prof %s 2>&1 | FileCheck
-check-prefix=CHECK-SAMPLE-PROFILE %s
+// CHECK-SAMPLE-PROFILE: "-lto-sample-profile:{{.*}}/file.prof"
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