all: remove pointer ElementType calls

This is needed for opaque pointers, which are enabled by default in
LLVM 15.

transform/allocs.go

@@ -124,7 +124,7 @@ func OptimizeAllocs(mod llvm.Module, printAllocs *regexp.Regexp, logger func(tok
 		alloca.SetAlignment(alignment)
 
 		// Zero the allocation inside the block where the value was originally allocated.
-		zero := llvm.ConstNull(alloca.Type().ElementType())
+		zero := llvm.ConstNull(alloca.AllocatedType())
 		builder.SetInsertPointBefore(bitcast)
 		store := builder.CreateStore(zero, alloca)
 		store.SetAlignment(alignment)

transform/gc.go

@@ -18,7 +18,7 @@ func MakeGCStackSlots(mod llvm.Module) bool {
 		stackChainStart := mod.NamedGlobal("runtime.stackChainStart")
 		if !stackChainStart.IsNil() {
 			stackChainStart.SetLinkage(llvm.InternalLinkage)
-			stackChainStart.SetInitializer(llvm.ConstNull(stackChainStart.Type().ElementType()))
+			stackChainStart.SetInitializer(llvm.ConstNull(stackChainStart.GlobalValueType()))
 			stackChainStart.SetGlobalConstant(true)
 		}
 		return false
@@ -96,7 +96,7 @@ func MakeGCStackSlots(mod llvm.Module) bool {
 		return false
 	}
 	stackChainStart.SetLinkage(llvm.InternalLinkage)
-	stackChainStartType := stackChainStart.Type().ElementType()
+	stackChainStartType := stackChainStart.GlobalValueType()
 	stackChainStart.SetInitializer(llvm.ConstNull(stackChainStartType))
 
 	// Iterate until runtime.trackPointer has no uses left.

transform/interface-lowering.go

@@ -423,7 +423,7 @@ func (p *lowerInterfacesPass) defineInterfaceImplementsFunc(fn llvm.Value, itf *
 func (p *lowerInterfacesPass) defineInterfaceMethodFunc(fn llvm.Value, itf *interfaceInfo, signature *signatureInfo) {
 	context := fn.LastParam()
 	actualType := llvm.PrevParam(context)
-	returnType := fn.Type().ElementType().ReturnType()
+	returnType := fn.GlobalValueType().ReturnType()
 	context.SetName("context")
 	actualType.SetName("actualType")
 	fn.SetLinkage(llvm.InternalLinkage)

transform/llvm.go

@@ -66,7 +66,7 @@ func getGlobalBytes(global llvm.Value, builder llvm.Builder) []byte {
 // function used for creating reflection sidetables, for example.
 func replaceGlobalIntWithArray(mod llvm.Module, name string, buf interface{}) llvm.Value {
 	oldGlobal := mod.NamedGlobal(name)
-	globalType, global := makeGlobalArray(mod, buf, name+".tmp", oldGlobal.Type().ElementType())
+	globalType, global := makeGlobalArray(mod, buf, name+".tmp", oldGlobal.GlobalValueType())
 	gep := llvm.ConstGEP(globalType, global, []llvm.Value{
 		llvm.ConstInt(mod.Context().Int32Type(), 0, false),
 		llvm.ConstInt(mod.Context().Int32Type(), 0, false),

transform/wasm-abi.go

@@ -50,7 +50,7 @@ func ExternalInt64AsPtr(mod llvm.Module, config *compileopts.Config) error {
 		paramTypes := []llvm.Type{}
 
 		// Check return type for 64-bit integer.
-		fnType := fn.Type().ElementType()
+		fnType := fn.GlobalValueType()
 		returnType := fnType.ReturnType()
 		if returnType == int64Type {
 			hasInt64 = true