1 files changed, 5 insertions, 0 deletions
diff --git a/src/arch/riscv64/CodeGen.zig b/src/arch/riscv64/CodeGen.zig
index 16d9548da7..f0ab8b3317 100644
--- a/src/arch/riscv64/CodeGen.zig
+++ b/src/arch/riscv64/CodeGen.zig
@@ -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);