Commit 6f09a7041e

@@ -655,6 +655,11 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
     const air_tags = self.air.instructions.items(.tag);
 
     for (body) |inst| {
+        // TODO: remove now-redundant isUnused calls from AIR handler functions
+        if (self.liveness.isUnused(inst) and !self.air.mustLower(inst)) {
+            continue;
+        }
+
         const old_air_bookkeeping = self.air_bookkeeping;
         try self.ensureProcessDeathCapacity(Liveness.bpi);
 

@@ -639,6 +639,11 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
     const air_tags = self.air.instructions.items(.tag);
 
     for (body) |inst| {
+        // TODO: remove now-redundant isUnused calls from AIR handler functions
+        if (self.liveness.isUnused(inst) and !self.air.mustLower(inst)) {
+            continue;
+        }
+
         const old_air_bookkeeping = self.air_bookkeeping;
         try self.ensureProcessDeathCapacity(Liveness.bpi);
 

@@ -473,6 +473,11 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
     const air_tags = self.air.instructions.items(.tag);
 
     for (body) |inst| {
+        // TODO: remove now-redundant isUnused calls from AIR handler functions
+        if (self.liveness.isUnused(inst) and !self.air.mustLower(inst)) {
+            continue;
+        }
+
         const old_air_bookkeeping = self.air_bookkeeping;
         try self.ensureProcessDeathCapacity(Liveness.bpi);
 

@@ -489,6 +489,11 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
     const air_tags = self.air.instructions.items(.tag);
 
     for (body) |inst| {
+        // TODO: remove now-redundant isUnused calls from AIR handler functions
+        if (self.liveness.isUnused(inst) and !self.air.mustLower(inst)) {
+            continue;
+        }
+
         const old_air_bookkeeping = self.air_bookkeeping;
         try self.ensureProcessDeathCapacity(Liveness.bpi);
 

@@ -905,6 +905,11 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
     const air_tags = self.air.instructions.items(.tag);
 
     for (body) |inst| {
+        // TODO: remove now-redundant isUnused calls from AIR handler functions
+        if (self.liveness.isUnused(inst) and !self.air.mustLower(inst)) {
+            continue;
+        }
+
         const old_air_bookkeeping = self.air_bookkeeping;
         try self.ensureProcessDeathCapacity(Liveness.bpi);
         if (builtin.mode == .Debug) {

@@ -1507,6 +1507,11 @@ pub const DeclGen = struct {
     }
 
     fn genInst(self: *DeclGen, inst: Air.Inst.Index) !void {
+        // TODO: remove now-redundant isUnused calls from AIR handler functions
+        if (self.liveness.isUnused(inst) and !self.air.mustLower(inst)) {
+            return;
+        }
+
         const air_tags = self.air.instructions.items(.tag);
         const maybe_result_id: ?IdRef = switch (air_tags[inst]) {
             // zig fmt: off