https://github.com/lalaniket8 created
https://github.com/llvm/llvm-project/pull/125646
When we launch hipcc with multiple offload architectures along with -MF
dep_file flag, the clang compilation invocations for host and device offloads
write to the same dep_file, and can lead to collision during file IO
operations. This can typically happen during large workloads. This commit
provides a fix to generate dep_file only in host compilation.
>From eec1f03d7e9fc24183b488952f9f510eb93b8a11 Mon Sep 17 00:00:00 2001
From: anikelal <anike...@amd.com>
Date: Tue, 4 Feb 2025 12:13:20 +0530
Subject: [PATCH] [Driver][HIP] Do not pass -dependency-file flag for HIP
Device offloading
When we launch hipcc with multiple offload architectures along with -MF
dep_file flag, the clang compilation invocations for host and device offloads
write to the same dep_file, and can lead to collision during file IO
operations. This can typically happen during large workloads.
This commit provides a fix to generate dep_file only in host compilation.
---
clang/lib/Driver/ToolChains/Clang.cpp | 30 ++++++++++++++-------------
1 file changed, 16 insertions(+), 14 deletions(-)
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp
b/clang/lib/Driver/ToolChains/Clang.cpp
index 9b5132c5625faa0..895fd0d7a180ee7 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -1013,21 +1013,23 @@ void Clang::AddPreprocessingOptions(Compilation &C,
const JobAction &JA,
ArgM = ArgMD;
if (ArgM) {
- // Determine the output location.
- const char *DepFile;
- if (Arg *MF = Args.getLastArg(options::OPT_MF)) {
- DepFile = MF->getValue();
- C.addFailureResultFile(DepFile, &JA);
- } else if (Output.getType() == types::TY_Dependencies) {
- DepFile = Output.getFilename();
- } else if (!ArgMD) {
- DepFile = "-";
- } else {
- DepFile = getDependencyFileName(Args, Inputs);
- C.addFailureResultFile(DepFile, &JA);
+ if (!JA.isDeviceOffloading(Action::OFK_HIP)) {
+ // Determine the output location.
+ const char *DepFile;
+ if (Arg *MF = Args.getLastArg(options::OPT_MF)) {
+ DepFile = MF->getValue();
+ C.addFailureResultFile(DepFile, &JA);
+ } else if (Output.getType() == types::TY_Dependencies) {
+ DepFile = Output.getFilename();
+ } else if (!ArgMD) {
+ DepFile = "-";
+ } else {
+ DepFile = getDependencyFileName(Args, Inputs);
+ C.addFailureResultFile(DepFile, &JA);
+ }
+ CmdArgs.push_back("-dependency-file");
+ CmdArgs.push_back(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)) {
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