Add load and store instructions.

Define a MemFlags class, currently holding a notrap and aligned flag.

lib/cretonne/src/ir/mod.rs

@@ -10,11 +10,12 @@ pub mod jumptable;
 pub mod dfg;
 pub mod layout;
 pub mod function;
-mod funcname;
-mod extfunc;
 mod builder;
-mod valueloc;
+mod extfunc;
+mod funcname;
+mod memflags;
 mod progpoint;
+mod valueloc;
 
 pub use ir::funcname::FunctionName;
 pub use ir::extfunc::{Signature, ArgumentType, ArgumentExtension, ExtFuncData};
@@ -29,3 +30,4 @@ pub use ir::layout::{Layout, Cursor};
 pub use ir::function::Function;
 pub use ir::builder::InstBuilder;
 pub use ir::progpoint::{ProgramPoint, ProgramOrder, ExpandedProgramPoint};
+pub use ir::memflags::MemFlags;