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Start a very simple GVN pass (#79)

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* Skeleton simple_gvn pass.
* Basic testing infrastructure for simple-gvn.
* Add can_load and can_store flags to instructions.
* Move the replace_values function into the DataFlowGraph.
* Make InstructionData derive from Hash, PartialEq, and Eq.
* Make EntityList's hash and eq functions panic.
* Change Ieee32 and Ieee64 to store u32 and u64, respectively.
This commit is contained in:
Dan Gohman
2017-05-18 18:18:57 -07:00
committed by Jakob Stoklund Olesen
parent 1d8efaad83
commit c826aefa0a
16 changed files with 256 additions and 57 deletions
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4
lib/cretonne/src/ir/condcodes.rs
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@@ -27,7 +27,7 @@ pub trait CondCode: Copy {
/// This condition code is used by the `icmp` instruction to compare integer values. There are
/// separate codes for comparing the integers as signed or unsigned numbers where it makes a
/// difference.
#[derive(Clone, Copy, PartialEq, Eq, Debug)]
#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
pub enum IntCC {
/// `==`.
Equal,
@@ -139,7 +139,7 @@ impl FromStr for IntCC {
/// The condition codes described here are used to produce a single boolean value from the
/// comparison. The 14 condition codes here cover every possible combination of the relation above
/// except the impossible `!UN & !EQ & !LT & !GT` and the always true `UN | EQ | LT | GT`.
#[derive(Clone, Copy, PartialEq, Eq, Debug)]
#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
pub enum FloatCC {
/// EQ | LT | GT
Ordered,