From 1cb1af774cdf0bd8c3f8da257c789184d349bc8c Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Mon, 30 Jan 2017 08:44:54 +0100
Subject: Fix loading global string literals

---
 codegen.hs | 8 +++++---
 puts.nl    | 9 +++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)
 create mode 100644 puts.nl

diff --git a/codegen.hs b/codegen.hs
index 23db784..bf620e4 100644
--- a/codegen.hs
+++ b/codegen.hs
@@ -477,9 +477,7 @@ literalToOperand (LitVar n) t = do
     return oper'
 literalToOperand (LitString s) (TypePtr (TypeInt 8)) = do
     name <- addStringLiteral s
-    let loadoper = A.ConstantOperand $ A.C.GlobalReference (A.ptr A.i8) (A.Name name)
-    label <- addInstr $ A.Load False loadoper Nothing 0 []
-    return $ A.LocalReference (A.ptr A.i8) (A.Name label)
+    return $ A.ConstantOperand $ A.C.GlobalReference (A.ptr A.i8) (A.Name name)
 literalToOperand (LitString _) _ = undefined
 literalToOperand (LitCall n args) _ = do
     ((TypeFunc rt ats), lname) <- lookupGlobalFunction n
@@ -526,6 +524,10 @@ castOperand orig@(A.LocalReference (A.PointerType t1 _) _) (TypePtr t2)
     | toLLVMType t2 == t1 = return orig
     | otherwise = throwError $ "Cannot implicitly cast between pointer to '" ++ show t1
                                ++ "' and '" ++ pshow t2 ++ "'"
+castOperand orig@(A.ConstantOperand (A.C.GlobalReference (A.PointerType t1 _) _)) (TypePtr t2)
+    | toLLVMType t2 == t1 = return orig
+    | otherwise = throwError $ "Cannot implicitly cast between pointer to '" ++ show t1
+                               ++ "' and '" ++ pshow t2 ++ "'"
 castOperand orig t2 = throwError $ "Cast from '" ++ show orig ++ "' to type '" ++ pshow t2 ++ "' not implemented"
 
 castToBool :: A.Operand -> CGMonad A.Operand
diff --git a/puts.nl b/puts.nl
new file mode 100644
index 0000000..4379916
--- /dev/null
+++ b/puts.nl
@@ -0,0 +1,9 @@
+type int = i32;
+type char = i8;
+
+extern func int(ptr(char)) puts;
+
+int main(){
+	puts("kaas!");
+	return 0;
+}
\ No newline at end of file
-- 
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