[Migrated] Reassigning to f64s doesn't work

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Issue automatically imported from old repo: https://github.com/EmbarkStudios/rust-gpu/issues/850
Old labels: t: bug,s: needs update
Originally creatd by Icelk on 2022-02-10T20:34:17Z

Expected Behaviour

Reassigning to a variable should work, just as it does with f32s.

Example & Steps To Reproduce

Run the compute example (just used as it's already set up).
Then, add the following lines to the shader code:

let mut test: f64 = 1.0;
test = 2.0;

You have to remove the #[deny(warnings)] at the top.

The shader will fail to compile. This also applies to when the value is read.

System Info

Rust: nightly-2022-01-13
OS: Arch Linux
GPU: Nvidia 1060
SPIR-V: no clue, but using latest commit from this repo to build

Compiler error

error: f64 without OpCapability Float64
   --> /home/icelk/.rustup/toolchains/nightly-2022-01-13-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/num/f64.rs:451:5
    |
451 |     pub(crate) const fn abs_private(self) -> f64 {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: Stack:
            main_cs

error: No OpEntryPoint instruction was found. This is only allowed if the Linkage capability is being used.
  |
  = note: module `/home/icelk/dev/Rust/fractal-renderer/target/spirv-unknown-vulkan1.1/release/deps/compute_shader.spv.dir/module`

warning: an unknown error occurred
  |
  = note: spirv-opt failed, leaving as unoptimized
  = note: module `/home/icelk/dev/Rust/fractal-renderer/target/spirv-unknown-vulkan1.1/release/deps/compute_shader.spv.dir/module`

error: error:0:0 - No OpEntryPoint instruction was found. This is only allowed if the Linkage capability is being used.
  |
  = note: spirv-val failed
  = note: module `/home/icelk/dev/Rust/fractal-renderer/target/spirv-unknown-vulkan1.1/release/deps/compute_shader.spv.dir/module`

warning: `compute-shader` (lib) generated 1 warning
error: could not compile `compute-shader` due to 3 previous errors; 1 warning emitted

Beginne mit dem Compute-Beispiel und reproduziere die Neuzuweisung und das Lesen von f64 anhand der Zeilen im Issue. Verfolge anschließend die resultierende Compiler-Ausgabe und die SPIR-V-Validierungsfehler und überprüfe dann, dass das Beispiel ohne die Float64- und Missing-Entry-Point-Fehler kompiliert.

Vom Indexierungsmodell aus dem Issue-Text verfasst.

Beschreibung

Expected Behaviour

Example & Steps To Reproduce

System Info

Compiler error

Beitragsleitfaden

Erste Schritte

Rechercherichtung

Bewertung

[Migrated] Reassigning to f64s doesn't work

Beschreibung

Expected Behaviour

Example & Steps To Reproduce

System Info

Compiler error

Beitragsleitfaden

Erste Schritte

Rechercherichtung

Bewertung

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