Take symbol name by GlobalValue again to avoid modifying Module

Author: mysterymath

llvm/docs/LangRef.rst

@@ -30653,14 +30653,14 @@ that purpose.
 Arguments:
 """"""""""
 
-The ``llvm.reloc.none`` intrinsic takes the symbol as a metadata string
-argument.
+The ``llvm.reloc.none`` intrinsic takes one argument, which may be any global
+value.
 
 Semantics:
 """"""""""
 
-This intrinsic emits a no-op relocation for the symbol the location of the
-intrinsic call.
+This intrinsic emits a no-op relocation at the location of the intrinsic call
+for the symbol that corresponds to the global value argument.
 
 
 Stack Map Intrinsics

llvm/include/llvm/IR/Intrinsics.td

@@ -1913,7 +1913,7 @@ def int_threadlocal_address : DefaultAttrsIntrinsic<[llvm_anyptr_ty], [LLVMMatch
 def int_stepvector : DefaultAttrsIntrinsic<[llvm_anyvector_ty],
                                             [], [IntrNoMem]>;
 
-def int_reloc_none : DefaultAttrsIntrinsic<[], [llvm_metadata_ty],
+def int_reloc_none : DefaultAttrsIntrinsic<[], [llvm_ptr_ty],
   [IntrHasSideEffects, IntrInaccessibleMemOnly, IntrWillReturn]>;
 
 //===---------------- Vector Predication Intrinsics --------------===//

llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp

@@ -2670,13 +2670,8 @@ bool IRTranslator::translateKnownIntrinsic(const CallInst &CI, Intrinsic::ID ID,
   case Intrinsic::experimental_convergence_loop:
     return translateConvergenceControlIntrinsic(CI, ID, MIRBuilder);
   case Intrinsic::reloc_none: {
-    Metadata *MD = cast<MetadataAsValue>(CI.getArgOperand(0))->getMetadata();
-    StringRef SymbolName = cast<MDString>(MD)->getString();
-    auto *M = const_cast<Module *>(CI.getModule());
-    auto *RelocSymbol = cast<GlobalVariable>(
-        M->getOrInsertGlobal(SymbolName, StructType::create(M->getContext())));
     MIRBuilder.buildInstr(TargetOpcode::RELOC_NONE)
-        .addGlobalAddress(RelocSymbol);
+        .addGlobalAddress(cast<GlobalValue>(CI.getArgOperand(0)));
     return true;
   }
   }

llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

@@ -7752,15 +7752,12 @@ void SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I,
   }
 
   case Intrinsic::reloc_none: {
-    Metadata *MD = cast<MetadataAsValue>(I.getArgOperand(0))->getMetadata();
-    StringRef SymbolName = cast<MDString>(MD)->getString();
-    auto *M = const_cast<Module *>(I.getModule());
-    auto *RelocSymbol = cast<GlobalVariable>(
-        M->getOrInsertGlobal(SymbolName, StructType::create(M->getContext())));
+    SDValue V = getValue(I.getArgOperand(0));
+    const auto *GA = cast<GlobalAddressSDNode>(V);
     SDValue Ops[2];
     Ops[0] = getRoot();
-    Ops[1] = DAG.getTargetGlobalAddress(
-        RelocSymbol, sdl, TLI.getPointerTy(DAG.getDataLayout()), 0);
+    Ops[1] = DAG.getTargetGlobalAddress(GA->getGlobal(), sdl, V.getValueType(),
+                                        GA->getOffset());
     DAG.setRoot(DAG.getNode(ISD::RELOC_NONE, sdl, MVT::Other, Ops));
     return;
   }

llvm/lib/IR/Verifier.cpp

@@ -5922,9 +5922,8 @@ void Verifier::visitIntrinsicCall(Intrinsic::ID ID, CallBase &Call) {
           "cache type argument to llvm.prefetch must be 0-1", Call);
     break;
   case Intrinsic::reloc_none: {
-    Check(isa<MDString>(
-              cast<MetadataAsValue>(Call.getArgOperand(0))->getMetadata()),
-          "llvm.reloc.none argument must be a metadata string", &Call);
+    Check(isa<GlobalValue>(Call.getArgOperand(0)),
+          "llvm.reloc.none argument must be a global value", &Call);
     break;
   }
   case Intrinsic::stackprotector:

llvm/test/CodeGen/Generic/reloc-none.ll

@@ -2,9 +2,12 @@
 
 ; CHECK: .reloc {{.*}}, BFD_RELOC_NONE, foo
 
+%1 = type opaque
+@foo = external global %1
+
 define void @test_reloc_none() {
-  call void @llvm.reloc.none(metadata !"foo")
+  call void @llvm.reloc.none(ptr @foo)
   ret void
 }
 
-declare void @llvm.reloc.none(metadata)
+declare void @llvm.reloc.none(ptr)

llvm/test/CodeGen/X86/GlobalISel/reloc-none.ll

@@ -1,14 +1,17 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc -mtriple=x86_64-linux-gnu -global-isel -verify-machineinstrs < %s -o - | FileCheck %s --check-prefix=CHECK
 
+%1 = type opaque
+@foo = external global %1
+
 define void @test_reloc_none() {
 ; CHECK-LABEL: test_reloc_none:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:  .Lreloc_none0:
 ; CHECK-NEXT:    .reloc .Lreloc_none0, BFD_RELOC_NONE, foo
 ; CHECK-NEXT:    retq
-  call void @llvm.reloc.none(metadata !"foo")
+  call void @llvm.reloc.none(ptr @foo)
   ret void
 }
 
-declare void @llvm.reloc.none(metadata)
+declare void @llvm.reloc.none(ptr)

llvm/test/Verifier/reloc-none.ll

@@ -0,0 +1,13 @@
+; RUN: not llvm-as -disable-output 2>&1 %s | FileCheck %s
+
+; CHECK: llvm.reloc.none argument must be a global value
+; CHECK-NEXT: call void @llvm.reloc.none(ptr %foo)
+
+define void @test_reloc_none_bad_arg(ptr %foo) {
+  call void @llvm.reloc.none(ptr %foo)
+  ret void
+}
+
+declare void @llvm.reloc.none(ptr)
+
+!0 = !{}