[OpaquePtr][LLParser] Automatically detect opaque pointers in .ll files

This allows us to not have to specify -opaque-pointers when updating
IR tests from typed pointers to opaque pointers.

We detect opaque pointers in .ll files by looking for relevant tokens,
either "ptr" or "*".

Reviewed By: #opaque-pointers, nikic

Differential Revision: https://reviews.llvm.org/D119482

1 files changed, 10 insertions, 2 deletions

diff --git a/llvm/lib/IR/LLVMContextImpl.cpp b/llvm/lib/IR/LLVMContextImpl.cpp
index 8f95302..401af7a 100644
--- a/llvm/lib/IR/LLVMContextImpl.cpp
+++ b/llvm/lib/IR/LLVMContextImpl.cpp
@@ -47,7 +47,11 @@ LLVMContextImpl::LLVMContextImpl(LLVMContext &C)
       X86_FP80Ty(C, Type::X86_FP80TyID), FP128Ty(C, Type::FP128TyID),
       PPC_FP128Ty(C, Type::PPC_FP128TyID), X86_MMXTy(C, Type::X86_MMXTyID),
       X86_AMXTy(C, Type::X86_AMXTyID), Int1Ty(C, 1), Int8Ty(C, 8),
-      Int16Ty(C, 16), Int32Ty(C, 32), Int64Ty(C, 64), Int128Ty(C, 128) {}
+      Int16Ty(C, 16), Int32Ty(C, 32), Int64Ty(C, 64), Int128Ty(C, 128) {
+  if (OpaquePointersCL.getNumOccurrences()) {
+    OpaquePointers = OpaquePointersCL;
+  }
+}
 
 LLVMContextImpl::~LLVMContextImpl() {
   // NOTE: We need to delete the contents of OwnedModules, but Module's dtor
@@ -245,9 +249,13 @@ void LLVMContextImpl::setOptPassGate(OptPassGate& OPG) {
   this->OPG = &OPG;
 }
 
+bool LLVMContextImpl::hasOpaquePointersValue() {
+  return OpaquePointers.hasValue();
+}
+
 bool LLVMContextImpl::getOpaquePointers() {
   if (LLVM_UNLIKELY(!(OpaquePointers.hasValue())))
-    OpaquePointers = OpaquePointersCL;
+    OpaquePointers = false;
   return *OpaquePointers;
 }