From d435fc868b9caef76b7a9b30a9c33adc3a79cab4 Mon Sep 17 00:00:00 2001
From: Ayke van Laethem <aykevanlaethem@gmail.com>
Date: Wed, 12 Oct 2022 21:46:50 +0200
Subject: [PATCH] transform: fix memory corruption issues

There was a bug in the wasm ABI lowering pass (found using
AddressSanitizer on LLVM 15) that resulted in a rather subtle memory
corruption. This commit fixes this issues.
---
 transform/wasm-abi.go | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/transform/wasm-abi.go b/transform/wasm-abi.go
index 83a16d85..08122a3e 100644
--- a/transform/wasm-abi.go
+++ b/transform/wasm-abi.go
@@ -88,8 +88,7 @@ func ExternalInt64AsPtr(mod llvm.Module, config *compileopts.Config) error {
 			// Update all users to call the external function.
 			// The old $i64wrapper function could be removed, but it may as well
 			// be left in place.
-			for use := fn.FirstUse(); !use.IsNil(); use = use.NextUse() {
-				call := use.User()
+			for _, call := range getUses(fn) {
 				entryBlockBuilder.SetInsertPointBefore(call.InstructionParent().Parent().EntryBasicBlock().FirstInstruction())
 				builder.SetInsertPointBefore(call)
 				callParams := []llvm.Value{}