Liveness: control flow analysis

This is a partial rewrite of Liveness, so has some other notable changes:
- A proper multi-pass system to prevent code duplication
- Better logging
- Minor bugfixes

1 files changed, 0 insertions, 6 deletions

diff --git a/src/arch/wasm/CodeGen.zig b/src/arch/wasm/CodeGen.zig
index 83af640b82..960b0ebf15 100644
--- a/src/arch/wasm/CodeGen.zig
+++ b/src/arch/wasm/CodeGen.zig
@@ -3183,7 +3183,6 @@ fn airLoop(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
     const ty_pl = func.air.instructions.items(.data)[inst].ty_pl;
     const loop = func.air.extraData(Air.Block, ty_pl.payload);
     const body = func.air.extra[loop.end..][0..loop.data.body_len];
-    const liveness_loop = func.liveness.getLoop(inst);
 
     // result type of loop is always 'noreturn', meaning we can always
     // emit the wasm type 'block_empty'.
@@ -3194,11 +3193,6 @@ fn airLoop(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
     try func.addLabel(.br, 0);
     try func.endBlock();
 
-    try func.currentBranch().values.ensureUnusedCapacity(func.gpa, @intCast(u32, liveness_loop.deaths.len));
-    for (liveness_loop.deaths) |death| {
-        func.processDeath(Air.indexToRef(death));
-    }
-
     func.finishAir(inst, .none, &.{});
 }