Fix alignment.

src/compiler/llvm_codegen_expr.c

@@ -2371,7 +2371,12 @@ static inline void llvm_emit_deref(GenContext *c, BEValue *value, Expr *inner, T
 	llvm_emit_expr(c, value, inner);
 	llvm_value_rvalue(c, value);
 	AlignSize alignment = type_abi_alignment(type);
-	if (safe_mode_enabled() && !expr_is_const(inner))
+	bool is_const = expr_is_const(inner);
+	if (is_const)
+	{
+		alignment = type_min_alignment(inner->const_expr.ptr, alignment);
+	}
+	if (safe_mode_enabled() && !is_const)
 	{
 		LLVMValueRef check = LLVMBuildICmp(c->builder, LLVMIntEQ, value->value, llvm_get_zero(c, inner->type), "checknull");
 		scratch_buffer_clear();

test/test_suite/safe/deref_absolute.c3t

@@ -1,6 +1,18 @@
-module main;
+// #target: macos-x64
+module test;
 
-fn void main()
+fn int main()
 {
     int x = *(int*)1;
-}
+    return 0;
+}
+
+/* #expect: test.ll
+
+define i32 @main() #0 {
+entry:
+  %x = alloca i32, align 4
+  %0 = load i32, ptr inttoptr (i64 1 to ptr), align 1
+  store i32 %0, ptr %x, align 4
+  ret i32 0
+}