https://github.com/zhouronghua updated
https://github.com/llvm/llvm-project/pull/119513
>From 9b2951130b90ee354910a43b5bcbed0f0d474a2c Mon Sep 17 00:00:00 2001
From: "ronghua.zhou" <ronghua.z...@enflame-tech.com>
Date: Tue, 10 Dec 2024 06:32:24 +0000
Subject: [PATCH] [Feature]: support for the BC library file into the compile
dependencies
---
clang/lib/Driver/ToolChains/Clang.cpp | 42 ++++++++++++++++++++++---
clang/lib/Frontend/CompilerInstance.cpp | 10 ++++--
2 files changed, 45 insertions(+), 7 deletions(-)
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp
b/clang/lib/Driver/ToolChains/Clang.cpp
index d3206c3e8e25ed..f9eb8f41972782 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -996,9 +996,9 @@ void Clang::AddPreprocessingOptions(Compilation &C, const
JobAction &JA,
else
ArgM = ArgMD;
+ // Determine the output location.
+ const char *DepFile = nullptr;
if (ArgM) {
- // Determine the output location.
- const char *DepFile;
if (Arg *MF = Args.getLastArg(options::OPT_MF)) {
DepFile = MF->getValue();
C.addFailureResultFile(DepFile, &JA);
@@ -1010,8 +1010,41 @@ void Clang::AddPreprocessingOptions(Compilation &C,
const JobAction &JA,
DepFile = getDependencyFileName(Args, Inputs);
C.addFailureResultFile(DepFile, &JA);
}
- CmdArgs.push_back("-dependency-file");
- CmdArgs.push_back(DepFile);
+
+ if (getToolChain().getTriple().isNVPTX() ||
+ getToolChain().getTriple().isAMDGCN()) {
+ // When we set(CMAKE_DEPFILE_FLAGS_${lang} "-MD -MT <DEP_TARGET> -MF
+ // <DEP_FILE>.host") in cmake during heterogeneous compilation,
+ // we really gererate *.d.host (for host) and *.d (for GPU target),
+ // the content of *.d = *.d.host + builtin.bc (i.e. libdevice.10.bc or
+ // some
+ // files in --hip-device-lib)
+ // so when libdevice.10.bc or hip-device-lib is updated, the incremental
+ // build rule will be triggered.
+ if (DepFile) {
+ SmallString<128> NewDepFile(DepFile);
+ llvm::StringRef SubStr = ".host";
+ size_t Pos = NewDepFile.find(SubStr);
+ CmdArgs.push_back("-dependency-file");
+ // for tops target, trim .host in dep file
+ if (Pos != llvm::StringRef::npos) {
+ // erase substr
+ auto ndf = NewDepFile.substr(0, Pos);
+ CmdArgs.push_back(Args.MakeArgString(ndf));
+ } else {
+ // if not set dep file with .host extend, remain depfile not touched
+ CmdArgs.push_back(Args.MakeArgString(DepFile));
+ }
+ }
+ }
+ // Host side remain depfile not touched
+ else {
+ // for host compile, we generate orginal dep file
+ if (DepFile) {
+ CmdArgs.push_back("-dependency-file");
+ CmdArgs.push_back(DepFile);
+ }
+ }
bool HasTarget = false;
for (const Arg *A : Args.filtered(options::OPT_MT, options::OPT_MQ)) {
@@ -1110,7 +1143,6 @@ void Clang::AddPreprocessingOptions(Compilation &C, const
JobAction &JA,
CmdArgs.push_back("__llvm_offload_device.h");
else
CmdArgs.push_back("__llvm_offload_host.h");
- }
// Add -i* options, and automatically translate to
// -include-pch/-include-pth for transparent PCH support. It's
diff --git a/clang/lib/Frontend/CompilerInstance.cpp
b/clang/lib/Frontend/CompilerInstance.cpp
index fbfc305ca06a04..14779b0161a70e 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -494,8 +494,14 @@ void
CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
// Handle generating dependencies, if requested.
const DependencyOutputOptions &DepOpts = getDependencyOutputOpts();
- if (!DepOpts.OutputFile.empty())
- addDependencyCollector(std::make_shared<DependencyFileGenerator>(DepOpts));
+ if (!DepOpts.OutputFile.empty()) {
+ auto DFG = std::make_shared<DependencyFileGenerator>(DepOpts);
+ for (auto F : getCodeGenOpts().LinkBitcodeFiles) {
+ DFG->maybeAddDependency(F.Filename, false, false, false, false);
+ }
+ addDependencyCollector(DFG);
+ }
+
if (!DepOpts.DOTOutputFile.empty())
AttachDependencyGraphGen(*PP, DepOpts.DOTOutputFile,
getHeaderSearchOpts().Sysroot);
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