[PATCH] D66601: [Clang][Bundler] Do not require host triple for extracting device bundles

[Sergey Dmitriev via Phabricator via cfe-commits]

sdmitriev created this revision.
sdmitriev added a reviewer: ABataev.
Herald added a reviewer: jdoerfert.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
sdmitriev added a reviewer: hfinkel.

Bundler currently requires host triple to be provided no matter if you are performing bundling or unbundling, but for unbundling operation such requirement is too restrictive. You may for example want to examine device part of the object for a particular offload target, but you have to extract host part as well even though you do not need it. Host triple isn't really needed for unbundling, so this patch removes that requirement.


Repository:
  rC Clang

https://reviews.llvm.org/D66601

Files:
  clang/test/Driver/clang-offload-bundler.c
  clang/tools/clang-offload-bundler/ClangOffloadBundler.cpp


Index: clang/tools/clang-offload-bundler/ClangOffloadBundler.cpp
===================================================================
--- clang/tools/clang-offload-bundler/ClangOffloadBundler.cpp
+++ clang/tools/clang-offload-bundler/ClangOffloadBundler.cpp
@@ -833,7 +833,6 @@
 
   // Read all the bundles that are in the work list. If we find no bundles we
   // assume the file is meant for the host target.
-  bool FoundHostBundle = false;
   while (!Worklist.empty()) {
     StringRef CurTriple = FH.get()->ReadBundleStart(Input);
 
@@ -859,10 +858,6 @@
     FH.get()->ReadBundle(OutputFile, Input);
     FH.get()->ReadBundleEnd(Input);
     Worklist.erase(Output);
-
-    // Record if we found the host bundle.
-    if (hasHostKind(CurTriple))
-      FoundHostBundle = true;
   }
 
   // If no bundles were found, assume the input file is the host bundle and
@@ -884,12 +879,6 @@
     return false;
   }
 
-  // If we found elements, we emit an error if none of those were for the host.
-  if (!FoundHostBundle) {
-    errs() << "error: Can't find bundle for the host target\n";
-    return true;
-  }
-
   // If we still have any elements in the worklist, create empty files for them.
   for (auto &E : Worklist) {
     std::error_code EC;
@@ -988,7 +977,9 @@
     ++Index;
   }
 
-  if (HostTargetNum != 1) {
+  // Host triple is not really needed for unbundling operation, so do not
+  // treat missing host triple as error if we do unbundling.
+  if ((Unbundle && HostTargetNum > 1) || (!Unbundle && HostTargetNum != 1)) {
     Error = true;
     errs() << "error: expecting exactly one host target but got "
            << HostTargetNum << ".\n";
Index: clang/test/Driver/clang-offload-bundler.c
===================================================================
--- clang/test/Driver/clang-offload-bundler.c
+++ clang/test/Driver/clang-offload-bundler.c
@@ -183,6 +183,10 @@
 // RUN: diff %t.empty %t.res.tgt1
 // RUN: diff %t.empty %t.res.tgt2
 
+// Check that we can extract target parts without providing host triple.
+// RUN: clang-offload-bundler -type=s -targets=openmp-powerpc64le-ibm-linux-gnu -outputs=%t.res.tgt1 -inputs=%t.bundle3.s -unbundle
+// RUN: diff %t.tgt1 %t.res.tgt1
+
 //
 // Check binary bundle/unbundle. The content that we have before bundling must be the same we have after unbundling.
 //
@@ -221,6 +225,10 @@
 // RUN: diff %t.empty %t.res.tgt1
 // RUN: diff %t.empty %t.res.tgt2
 
+// Check that we can extract target parts without providing host triple.
+// RUN: clang-offload-bundler -type=ast -targets=openmp-powerpc64le-ibm-linux-gnu -outputs=%t.res.tgt1 -inputs=%t.bundle3.unordered.ast -unbundle
+// RUN: diff %t.tgt1 %t.res.tgt1
+
 //
 // Check object bundle/unbundle. The content should be bundled into an ELF
 // section (we are using a PowerPC little-endian host which uses ELF). We
@@ -256,6 +264,10 @@
 // RUN: diff %t.empty %t.res.tgt1
 // RUN: diff %t.empty %t.res.tgt2
 
+// Check that we can extract target parts without providing host triple.
+// RUN: clang-offload-bundler -type=o -targets=openmp-powerpc64le-ibm-linux-gnu -outputs=%t.res.tgt1 -inputs=%t.bundle3.o -unbundle
+// RUN: diff %t.tgt1 %t.res.tgt1
+
 // Some code so that we can create a binary out of this file.
 int A = 0;
 void test_func(void) {


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