main/llvm: backport upstream patches required by Julia

All of the patches are taken directly from the LLVM upstream, master branch.

1 files changed, 129 insertions, 0 deletions

diff --git a/main/llvm/llvm-0006-clone-every-functions-debug-info.patch b/main/llvm/llvm-0006-clone-every-functions-debug-info.patch
new file mode 100644
index 0000000000..567ddcadd4
--- /dev/null
+++ b/main/llvm/llvm-0006-clone-every-functions-debug-info.patch
@@ -0,0 +1,129 @@
+From 11adcc4de0797c83e61ae0240927f0bafcf041a9 Mon Sep 17 00:00:00 2001
+From: Keno Fischer <kfischer@college.harvard.edu>
+Date: Sat, 13 Feb 2016 02:04:29 +0000
+Subject: [PATCH] [Cloning] Clone every Function's Debug Info
+
+Summary:
+Export the CloneDebugInfoMetadata utility, which clones all debug info
+associated with a function into the first module. Also use this function
+in CloneModule on each function we clone (the CloneFunction entrypoint
+already does this).
+
+Without this, cloning a module will lead to DI quality regressions,
+especially since r252219 reversed the Function <-> DISubprogram edge
+(before we could get lucky and have this edge preserved if the
+DISubprogram itself was, e.g. due to location metadata).
+
+This was verified to fix missing debug information in julia and
+a unittest to verify the new behavior is included.
+
+Patch by Yichao Yu! Thanks!
+
+Reviewers: loladiro, pcc
+Differential Revision: http://reviews.llvm.org/D17165
+
+git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260791 91177308-0d34-0410-b5e6-96231b3b80d8
+
+Alpine maintainer notes:
+  - Corresponds to llvm-D17165-D18583.patch in Julia.
+---
+ include/llvm/Transforms/Utils/Cloning.h |  5 +++++
+ lib/Transforms/Utils/CloneFunction.cpp  |  4 ++--
+ lib/Transforms/Utils/CloneModule.cpp    |  1 +
+ unittests/Transforms/Utils/Cloning.cpp  | 25 +++++++++++++++++++++++++
+ 4 files changed, 33 insertions(+), 2 deletions(-)
+
+diff --git a/include/llvm/Transforms/Utils/Cloning.h b/include/llvm/Transforms/Utils/Cloning.h
+index 4f006f2..0bae2bd 100644
+--- a/include/llvm/Transforms/Utils/Cloning.h
++++ b/include/llvm/Transforms/Utils/Cloning.h
+@@ -130,6 +130,11 @@ Function *CloneFunction(const Function *F, ValueToValueMapTy &VMap,
+                         bool ModuleLevelChanges,
+                         ClonedCodeInfo *CodeInfo = nullptr);
+ 
++/// Clone the module-level debug info associated with OldFunc. The cloned data
++/// will point to NewFunc instead.
++void CloneDebugInfoMetadata(Function *NewFunc, const Function *OldFunc,
++                            ValueToValueMapTy &VMap);
++
+ /// Clone OldFunc into NewFunc, transforming the old arguments into references
+ /// to VMap values.  Note that if NewFunc already has basic blocks, the ones
+ /// cloned into it will be added to the end of the function.  This function
+diff --git a/lib/Transforms/Utils/CloneFunction.cpp b/lib/Transforms/Utils/CloneFunction.cpp
+index 6454afb..8b5692a 100644
+--- a/lib/Transforms/Utils/CloneFunction.cpp
++++ b/lib/Transforms/Utils/CloneFunction.cpp
+@@ -187,8 +187,8 @@ static void AddOperand(DICompileUnit *CU, DISubprogramArray SPs,
+ 
+ // Clone the module-level debug info associated with OldFunc. The cloned data
+ // will point to NewFunc instead.
+-static void CloneDebugInfoMetadata(Function *NewFunc, const Function *OldFunc,
+-                            ValueToValueMapTy &VMap) {
++void llvm::CloneDebugInfoMetadata(Function *NewFunc, const Function *OldFunc,
++                                  ValueToValueMapTy &VMap) {
+   DebugInfoFinder Finder;
+   Finder.processModule(*OldFunc->getParent());
+ 
+diff --git a/lib/Transforms/Utils/CloneModule.cpp b/lib/Transforms/Utils/CloneModule.cpp
+index 53de62a..b16a02a 100644
+--- a/lib/Transforms/Utils/CloneModule.cpp
++++ b/lib/Transforms/Utils/CloneModule.cpp
+@@ -136,6 +136,7 @@ std::unique_ptr<Module> llvm::CloneModule(
+         VMap[&*J] = &*DestI++;
+       }
+ 
++      CloneDebugInfoMetadata(F, &*I, VMap);
+       SmallVector<ReturnInst*, 8> Returns;  // Ignore returns cloned.
+       CloneFunctionInto(F, &*I, VMap, /*ModuleLevelChanges=*/true, Returns);
+     }
+diff --git a/unittests/Transforms/Utils/Cloning.cpp b/unittests/Transforms/Utils/Cloning.cpp
+index 25e322e..b761e4e 100644
+--- a/unittests/Transforms/Utils/Cloning.cpp
++++ b/unittests/Transforms/Utils/Cloning.cpp
+@@ -423,6 +423,7 @@ class CloneModule : public ::testing::Test {
+   void SetupModule() { OldM = new Module("", C); }
+ 
+   void CreateOldModule() {
++    DIBuilder DBuilder(*OldM);
+     IRBuilder<> IBuilder(C);
+ 
+     auto *FuncType = FunctionType::get(Type::getVoidTy(C), false);
+@@ -431,9 +432,25 @@ class CloneModule : public ::testing::Test {
+     auto *F =
+         Function::Create(FuncType, GlobalValue::PrivateLinkage, "f", OldM);
+     F->setPersonalityFn(PersFn);
++
++    // Create debug info
++    auto *File = DBuilder.createFile("filename.c", "/file/dir/");
++    DITypeRefArray ParamTypes = DBuilder.getOrCreateTypeArray(None);
++    DISubroutineType *DFuncType = DBuilder.createSubroutineType(ParamTypes);
++    auto *CU =
++        DBuilder.createCompileUnit(dwarf::DW_LANG_C99, "filename.c",
++                                   "/file/dir", "CloneModule", false, "", 0);
++    // Function DI
++    auto *Subprogram = DBuilder.createFunction(CU, "f", "f", File, 4, DFuncType,
++                                               true, true, 3, 0, false);
++    F->setSubprogram(Subprogram);
++
+     auto *Entry = BasicBlock::Create(C, "", F);
+     IBuilder.SetInsertPoint(Entry);
+     IBuilder.CreateRetVoid();
++
++    // Finalize the debug info
++    DBuilder.finalize();
+   }
+ 
+   void CreateNewModule() { NewM = llvm::CloneModule(OldM).release(); }
+@@ -447,4 +464,12 @@ TEST_F(CloneModule, Verify) {
+   EXPECT_FALSE(verifyModule(*NewM));
+ }
+ 
++TEST_F(CloneModule, Subprogram) {
++  Function *NewF = NewM->getFunction("f");
++  DISubprogram *SP = NewF->getSubprogram();
++  EXPECT_TRUE(SP != nullptr);
++  EXPECT_EQ(SP->getName(), "f");
++  EXPECT_EQ(SP->getFile()->getFilename(), "filename.c");
++  EXPECT_EQ(SP->getLine(), (unsigned)4);
++}
+ }