Use getPointerAddressSpace instead of cast<PointerType>.getAddressSpace. (#54113)

The former also handles vectors of pointers, which can occur after
vectorization:

```
#5  0x00007f5bfe94de5e in llvm::cast<llvm::PointerType, llvm::Type> (Val=<optimized out>) at llvm/Support/Casting.h:578
578	  assert(isa<To>(Val) && "cast<Ty>() argument of incompatible type!");

(rr) up
#6  GCInvariantVerifier::visitAddrSpaceCastInst (this=this@entry=0x7ffd022fbf56, I=...) at julia/src/llvm-gc-invariant-verifier.cpp:66
66	    unsigned ToAS = cast<PointerType>(I.getDestTy())->getAddressSpace();

(rr) call I.dump()
%23 = addrspacecast <4 x ptr addrspace(10)> %wide.load to <4 x ptr addrspace(11)>, !dbg !43
```

Fixes aborts seen in #53070

Author: maleadt

src/cgutils.cpp

@@ -57,7 +57,7 @@ static Value *maybe_decay_untracked(jl_codectx_t &ctx, Value *V)
 static Value *decay_derived(jl_codectx_t &ctx, Value *V)
 {
     Type *T = V->getType();
-    if (cast<PointerType>(T)->getAddressSpace() == AddressSpace::Derived)
+    if (T->getPointerAddressSpace() == AddressSpace::Derived)
         return V;
     // Once llvm deletes pointer element types, we won't need it here any more either.
     Type *NewT = PointerType::getWithSamePointeeType(cast<PointerType>(T), AddressSpace::Derived);
@@ -68,7 +68,7 @@ static Value *decay_derived(jl_codectx_t &ctx, Value *V)
 static Value *maybe_decay_tracked(jl_codectx_t &ctx, Value *V)
 {
     Type *T = V->getType();
-    if (cast<PointerType>(T)->getAddressSpace() != AddressSpace::Tracked)
+    if (T->getPointerAddressSpace() != AddressSpace::Tracked)
         return V;
     Type *NewT = PointerType::getWithSamePointeeType(cast<PointerType>(T), AddressSpace::Derived);
     return ctx.builder.CreateAddrSpaceCast(V, NewT);
@@ -295,7 +295,7 @@ void jl_debugcache_t::initialize(Module *m) {
 
 static Value *emit_pointer_from_objref(jl_codectx_t &ctx, Value *V)
 {
-    unsigned AS = cast<PointerType>(V->getType())->getAddressSpace();
+    unsigned AS = V->getType()->getPointerAddressSpace();
     if (AS != AddressSpace::Tracked && AS != AddressSpace::Derived)
         return V;
     V = decay_derived(ctx, V);

src/llvm-alloc-opt.cpp

@@ -1067,10 +1067,11 @@ void Optimizer::splitOnStack(CallInst *orig_inst)
                     store_ty = T_pjlvalue;
                 }
                 else {
-                    store_ty = PointerType::getWithSamePointeeType(T_pjlvalue, cast<PointerType>(store_ty)->getAddressSpace());
+                    store_ty = PointerType::getWithSamePointeeType(
+                        T_pjlvalue, store_ty->getPointerAddressSpace());
                     store_val = builder.CreateBitCast(store_val, store_ty);
                 }
-                if (cast<PointerType>(store_ty)->getAddressSpace() != AddressSpace::Tracked)
+                if (store_ty->getPointerAddressSpace() != AddressSpace::Tracked)
                     store_val = builder.CreateAddrSpaceCast(store_val, pass.T_prjlvalue);
                 newstore = builder.CreateStore(store_val, slot.slot);
             }

src/llvm-gc-invariant-verifier.cpp

@@ -62,8 +62,8 @@ struct GCInvariantVerifier : public InstVisitor<GCInvariantVerifier> {
 };
 
 void GCInvariantVerifier::visitAddrSpaceCastInst(AddrSpaceCastInst &I) {
-    unsigned FromAS = cast<PointerType>(I.getSrcTy())->getAddressSpace();
-    unsigned ToAS = cast<PointerType>(I.getDestTy())->getAddressSpace();
+    unsigned FromAS = I.getSrcTy()->getPointerAddressSpace();
+    unsigned ToAS = I.getDestTy()->getPointerAddressSpace();
     if (FromAS == 0)
         return;
     Check(ToAS != AddressSpace::Loaded && FromAS != AddressSpace::Loaded,
@@ -78,10 +78,10 @@ void GCInvariantVerifier::visitAddrSpaceCastInst(AddrSpaceCastInst &I) {
 }
 
 void GCInvariantVerifier::checkStoreInst(Type *VTy, unsigned AS, Value &SI) {
-    if (VTy->isPointerTy()) {
+    if (VTy->isPtrOrPtrVectorTy()) {
         /* We currently don't obey this for arguments. That's ok - they're
            externally rooted. */
-        unsigned AS = cast<PointerType>(VTy)->getAddressSpace();
+        unsigned AS = VTy->getPointerAddressSpace();
         Check(AS != AddressSpace::CalleeRooted &&
               AS != AddressSpace::Derived,
               "Illegal store of decayed value", &SI);
@@ -107,15 +107,15 @@ void GCInvariantVerifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &SI) {
 
 void GCInvariantVerifier::visitLoadInst(LoadInst &LI) {
     Type *Ty = LI.getType();
-    if (Ty->isPointerTy()) {
-        unsigned AS = cast<PointerType>(Ty)->getAddressSpace();
+    if (Ty->isPtrOrPtrVectorTy()) {
+        unsigned AS = Ty->getPointerAddressSpace();
         Check(AS != AddressSpace::CalleeRooted &&
               AS != AddressSpace::Derived,
               "Illegal load of gc relevant value", &LI);
     }
     Ty = LI.getPointerOperand()->getType();
-    if (Ty->isPointerTy()) {
-        unsigned AS = cast<PointerType>(Ty)->getAddressSpace();
+    if (Ty->isPtrOrPtrVectorTy()) {
+        unsigned AS = Ty->getPointerAddressSpace();
         Check(AS != AddressSpace::CalleeRooted,
               "Illegal load of callee rooted value", &LI);
     }
@@ -129,18 +129,18 @@ void GCInvariantVerifier::visitReturnInst(ReturnInst &RI) {
     if (!RI.getReturnValue())
         return;
     Type *RTy = RI.getReturnValue()->getType();
-    if (!RTy->isPointerTy())
+    if (!RTy->isPtrOrPtrVectorTy())
         return;
-    unsigned AS = cast<PointerType>(RTy)->getAddressSpace();
+    unsigned AS = RTy->getPointerAddressSpace();
     Check(!isSpecialAS(AS) || AS == AddressSpace::Tracked,
           "Only gc tracked values may be directly returned", &RI);
 }
 
 void GCInvariantVerifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
     Type *Ty = GEP.getType();
-    if (!Ty->isPointerTy())
+    if (!Ty->isPtrOrPtrVectorTy())
         return;
-    unsigned AS = cast<PointerType>(Ty)->getAddressSpace();
+    unsigned AS = Ty->getPointerAddressSpace();
     if (!isSpecialAS(AS))
         return;
     /* We're actually ok with GEPs here, as long as they don't feed into any
@@ -170,8 +170,9 @@ void GCInvariantVerifier::visitCallInst(CallInst &CI) {
                 continue;
             }
             Type *Ty = Arg->getType();
-            Check(Ty->isPointerTy() && cast<PointerType>(Ty)->getAddressSpace() == AddressSpace::Tracked,
-                "Invalid derived pointer in jlcall", &CI);
+            Check(Ty->isPtrOrPtrVectorTy() &&
+                      Ty->getPointerAddressSpace() == AddressSpace::Tracked,
+                  "Invalid derived pointer in jlcall", &CI);
         }
     }
 }

src/llvm-propagate-addrspaces.cpp

@@ -60,7 +60,7 @@ struct PropagateJuliaAddrspacesVisitor : public InstVisitor<PropagateJuliaAddrsp
 };
 
 static unsigned getValueAddrSpace(Value *V) {
-    return cast<PointerType>(V->getType())->getAddressSpace();
+    return V->getType()->getPointerAddressSpace();
 }
 
 static bool isSpecialAS(unsigned AS) {
@@ -139,7 +139,7 @@ Value *PropagateJuliaAddrspacesVisitor::LiftPointer(Module *M, Value *V, Instruc
                 break;
             } else {
                 // Ok, we've reached a leaf - check if it is eligible for lifting
-                if (!CurrentV->getType()->isPointerTy() ||
+                if (!CurrentV->getType()->isPtrOrPtrVectorTy() ||
                     isSpecialAS(getValueAddrSpace(CurrentV))) {
                     // If not, poison all (recursive) users of this value, to prevent
                     // looking at them again in future iterations.

test/llvmpasses/gc-invariant-verifier.ll

@@ -0,0 +1,13 @@
+; This file is a part of Julia. License is MIT: https://julialang.org/license
+
+; RUN: opt -enable-new-pm=1 --opaque-pointers=1 --load-pass-plugin=libjulia-codegen%shlibext -passes='function(GCInvariantVerifier)' -S %s | FileCheck %s
+
+; CHECK-LABEL: @vectorized_addrspacecast
+define ptr addrspace(10) @vectorized_addrspacecast() {
+top:
+  ret ptr addrspace(10) null
+
+vector.ph:
+  %0 = addrspacecast <4 x ptr addrspace(10)> zeroinitializer to <4 x ptr addrspace(11)>
+  unreachable
+}