Made --spirt the default, added --no-spirt

crates/rustc_codegen_spirv/src/codegen_cx/mod.rs

@@ -361,8 +361,8 @@ impl CodegenArgs {
 
             opts.optflag(
                 "",
-                "spirt",
-                "use SPIR-T for legalization (see also `docs/src/codegen-args.md`)",
+                "no-spirt",
+                "disable SPIR-T for legalization (see also `docs/src/codegen-args.md`)",
             );
             opts.optmulti(
                 "",
@@ -537,7 +537,7 @@ impl CodegenArgs {
             dce: !matches.opt_present("no-dce"),
             compact_ids: !matches.opt_present("no-compact-ids"),
             structurize: !matches.opt_present("no-structurize"),
-            spirt: matches.opt_present("spirt"),
+            spirt: !matches.opt_present("no-spirt"),
             spirt_passes: matches
                 .opt_strs("spirt-passes")
                 .iter()

docs/src/codegen-args.md

@@ -139,7 +139,9 @@ anyway, be careful).
 
 Disables CFG structurization. Probably results in invalid modules.
 
-### `--spirt`
+### `--spirt` <sub>_(until 0.6.0)_</sub>
+
+Note: as of `rust-gpu 0.6.0`, `SPIR-🇹` is enabled by default. Use `--no-spirt` to disable.
 
 Enables using the experimental [`SPIR-🇹` shader IR framework](https://github.com/EmbarkStudios/spirt) in the linker - more specifically, this:
 - adds a `SPIR-V -> SPIR-🇹 -> SPIR-V` roundtrip  
@@ -149,6 +151,9 @@ Enables using the experimental [`SPIR-🇹` shader IR framework](https://github.
 
 For more information, also see [the `SPIR-🇹` repository](https://github.com/EmbarkStudios/spirt).
 
+### `--no-spirt` <sub>_(0.6.0)_</sup>
+Disables the [`SPIR-🇹` shader IR framework](https://github.com/EmbarkStudios/spirt) in the linker.
+
 ### `--spirt-passes PASSES`
 
 Enable additional `SPIR-🇹` passes, as listed in `PASSES` (comma-separated).