From 7258553528c4336186b63c6fae8fe3b8c8ee6525 Mon Sep 17 00:00:00 2001
From: Ayke van Laethem <aykevanlaethem@gmail.com>
Date: Wed, 5 Sep 2018 11:15:33 +0200
Subject: [PATCH] compiler: implement const pointers from integers

These raw pointers are used for memory-mapped IO.
---
 compiler.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler.go b/compiler.go
index e52ca05e1..cf10efeec 100644
--- a/compiler.go
+++ b/compiler.go
@@ -2414,7 +2414,8 @@ func (c *Compiler) parseConst(expr *ssa.Const) (llvm.Value, error) {
 			return strObj, nil
 		} else if typ.Kind() == types.UnsafePointer {
 			if !expr.IsNil() {
-				return llvm.Value{}, errors.New("todo: non-null constant pointer")
+				value, _ := constant.Uint64Val(expr.Value)
+				return llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, value, false), c.i8ptrType), nil
 			}
 			return llvm.ConstNull(c.i8ptrType), nil
 		} else if typ.Info()&types.IsUnsigned != 0 {