IRGen,Driver: extract tool usage into a variable (NFC)

autolink-extract is needed on ELF (and windows-cygnus).  However, WASM
also has gone down this path and did not actually indicate that it
needed the autolink extract handling.  Extract the handling check into a
variable which helps readability.

Author: compnerd

lib/Driver/Driver.cpp

@@ -2043,9 +2043,12 @@ void Driver::buildActions(SmallVectorImpl<const Action *> &TopLevelActions,
     for (const Action *A : AllLinkerInputs)
       if (A->getType() == file_types::TY_Object)
         AutolinkExtractInputs.push_back(A);
-    if (!AutolinkExtractInputs.empty() &&
-        (TC.getTriple().getObjectFormat() == llvm::Triple::ELF ||
-         TC.getTriple().isOSCygMing())) {
+    const auto &Triple = TC.getTriple();
+    const bool AutolinkExtractRequired =
+        (Triple.getObjectFormat() == llvm::Triple::ELF && !Triple.isPS4()) ||
+        Triple.getObjectFormat() == llvm::Triple::Wasm ||
+        Triple.isOSCygMing();
+    if (!AutolinkExtractInputs.empty() && AutolinkExtractRequired) {
       auto *AutolinkExtractAction =
           C.createAction<AutolinkExtractJobAction>(AutolinkExtractInputs);
       // Takes the same inputs as the linker...
@@ -2055,8 +2058,9 @@ void Driver::buildActions(SmallVectorImpl<const Action *> &TopLevelActions,
 
     if (MergeModuleAction) {
       if (OI.DebugInfoLevel == IRGenDebugInfoLevel::Normal) {
-        if (TC.getTriple().getObjectFormat() == llvm::Triple::ELF ||
-            TC.getTriple().getObjectFormat() == llvm::Triple::COFF) {
+        const bool ModuleWrapRequired =
+            Triple.getObjectFormat() != llvm::Triple::MachO;
+        if (ModuleWrapRequired) {
           auto *ModuleWrapAction =
               C.createAction<ModuleWrapJobAction>(MergeModuleAction);
           LinkAction->addInput(ModuleWrapAction);

lib/IRGen/IRGenModule.cpp

@@ -1153,21 +1153,17 @@ void IRGenModule::emitAutolinkInfo() {
                                        }),
                         AutolinkEntries.end());
 
-  if ((TargetInfo.OutputObjectFormat == llvm::Triple::COFF &&
-       !Triple.isOSCygMing()) ||
-      TargetInfo.OutputObjectFormat == llvm::Triple::MachO || Triple.isPS4()) {
+  const bool AutolinkExtractRequired =
+      (TargetInfo.OutputObjectFormat == llvm::Triple::ELF && !Triple.isPS4()) ||
+      TargetInfo.OutputObjectFormat == llvm::Triple::Wasm ||
+      Triple.isOSCygMing();
 
+  if (!AutolinkExtractRequired) {
     // On platforms that support autolinking, continue to use the metadata.
     Metadata->clearOperands();
     for (auto *Entry : AutolinkEntries)
       Metadata->addOperand(Entry);
-
   } else {
-    assert((TargetInfo.OutputObjectFormat == llvm::Triple::ELF ||
-            TargetInfo.OutputObjectFormat == llvm::Triple::Wasm ||
-            Triple.isOSCygMing()) &&
-           "expected ELF output format or COFF format for Cygwin/MinGW");
-
     // Merge the entries into null-separated string.
     llvm::SmallString<64> EntriesString;
     for (auto &EntryNode : AutolinkEntries) {