From 812b4db4e97e9554ff63e3f2c5e4b6e88633b219 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Thu, 21 Dec 2023 16:16:44 +0000
Subject: Avoid silently dropping instructions when generating LLVM code

---
 .../compiler/backends/llvm/codegen/PatioToLlvmFunctionContext.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/main/java')

diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/codegen/PatioToLlvmFunctionContext.java b/src/main/java/org/shedlang/compiler/backends/llvm/codegen/PatioToLlvmFunctionContext.java
index 18e46e3c..c27beec6 100644
--- a/src/main/java/org/shedlang/compiler/backends/llvm/codegen/PatioToLlvmFunctionContext.java
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/codegen/PatioToLlvmFunctionContext.java
@@ -69,7 +69,9 @@ class PatioToLlvmFunctionContext {
     }
 
     PatioToLlvmModuleContext.Result<PVector<LlvmBasicBlock>> toBasicBlocks() {
-        // TODO: check there are no instructions without a terminator.
+        if (!this.instructions.isEmpty()) {
+            throw new IllegalStateException("basic block is missing terminator instruction");
+        }
 
         return this.moduleContext.toResult(this.basicBlocks);
     }
-- 
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