[llvm-lipo] Support object files with bitcode asm

llvm-lipo crashes when trying to use inputs that contain bitcode asm instructions.
This happens when trying to create universal binaries for LLVM with LTO.
https://reviews.llvm.org/D118575 is a similar change that ran into this same issue, and I'm
mirroring the same change by registering the targets to fix this issue.

Reviewed By: alexander-shaposhnikov, keith

Differential Revision: https://reviews.llvm.org/D133729

llvm/test/tools/llvm-lipo/Inputs/arm64-asm.ll

@@ -0,0 +1,7 @@
+target triple = "arm64-apple-macosx11.0.0"
+
+module asm ".desc ___crashreporter_info__, 0x10"
+
+define void @somesymbol() {
+  ret void
+}

llvm/test/tools/llvm-lipo/Inputs/x86_64-asm.ll

@@ -0,0 +1,7 @@
+target triple = "x86_64-apple-macosx11.0.0"
+
+module asm ".desc ___crashreporter_info__, 0x10"
+
+define void @somesymbol() {
+  ret void
+}

llvm/test/tools/llvm-lipo/create-arch-asm.test

@@ -0,0 +1,8 @@
+# RUN: llvm-as %p/Inputs/arm64-asm.ll -o %t-arm64-asm.o
+# RUN: llvm-as %p/Inputs/x86_64-asm.ll -o %t-x86_64-asm.o
+
+# RUN: llvm-lipo %t-arm64-asm.o %t-x86_64-asm.o -create -output %t-universal.o
+# RUN: llvm-lipo %t-arm64-asm.o -arch x86_64 %t-x86_64-asm.o -create -output %t-universal-1.o
+# RUN: cmp %t-universal.o %t-universal-1.o
+# RUN: llvm-lipo -arch arm64 %t-arm64-asm.o -arch x86_64 %t-x86_64-asm.o -create -output %t-universal-2.o
+# RUN: cmp %t-universal.o %t-universal-2.o

llvm/tools/llvm-lipo/llvm-lipo.cpp

@@ -28,6 +28,7 @@
 #include "llvm/Support/Error.h"
 #include "llvm/Support/FileOutputBuffer.h"
 #include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/TargetSelect.h"
 #include "llvm/Support/WithColor.h"
 #include "llvm/TextAPI/Architecture.h"
 
@@ -425,7 +426,7 @@ static void printBinaryArchs(LLVMContext &LLVMCtx, const Binary *Binary,
   Expected<Slice> SliceOrErr = createSliceFromIR(*IR, 0);
   if (!SliceOrErr)
     reportError(IR->getFileName(), SliceOrErr.takeError());
-  
+
   OS << SliceOrErr->getArchString() << " \n";
 }
 
@@ -720,6 +721,10 @@ replaceSlices(LLVMContext &LLVMCtx,
 
 int main(int argc, char **argv) {
   InitLLVM X(argc, argv);
+  llvm::InitializeAllTargetInfos();
+  llvm::InitializeAllTargetMCs();
+  llvm::InitializeAllAsmParsers();
+
   Config C = parseLipoOptions(makeArrayRef(argv + 1, argc - 1));
   LLVMContext LLVMCtx;
   SmallVector<OwningBinary<Binary>, 1> InputBinaries =