GLSL: move entry point handling to CanonicalizeEntryPointIO transform.

Move builtin_to_string() and builtin_type() to
the CanonicalizeEntryPointIO transform. Use the former to
rename entry point IO variables to the gl_ names, and the latter
to cast values to the correct type.

Change-Id: Iddfad574ddd660ff1bfd89a399a001b967b6b67e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/78380
Reviewed-by: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>

test/expressions/zero_init/array/bool.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   bool v[4] = bool[4](false, false, false, false);
 }

test/expressions/zero_init/array/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   float v[4] = float[4](0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/array/i32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   int v[4] = int[4](0, 0, 0, 0);
 }

test/expressions/zero_init/array/struct.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 struct S {
   int i;
   uint u;

test/expressions/zero_init/array/u32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   uint v[4] = uint[4](0u, 0u, 0u, 0u);
 }

test/expressions/zero_init/mat2x2/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat2 v = mat2(0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat2x3/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat2x3 v = mat2x3(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat2x4/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat2x4 v = mat2x4(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat3x2/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat3x2 v = mat3x2(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat3x3/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat3 v = mat3(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat3x4/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat3x4 v = mat3x4(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat4x2/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat4x2 v = mat4x2(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat4x3/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat4x3 v = mat4x3(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/mat4x4/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   mat4 v = mat4(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/scalar/bool.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   bool v = false;
 }

test/expressions/zero_init/scalar/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   float v = 0.0f;
 }

test/expressions/zero_init/scalar/i32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   int v = 0;
 }

test/expressions/zero_init/scalar/u32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   uint v = 0u;
 }

test/expressions/zero_init/struct/array.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 struct S {
   float a[4];
 };

test/expressions/zero_init/struct/scalar.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 struct S {
   int i;
   uint u;

test/expressions/zero_init/vec2/bool.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   bvec2 v = bvec2(false, false);
 }

test/expressions/zero_init/vec2/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   vec2 v = vec2(0.0f, 0.0f);
 }

test/expressions/zero_init/vec2/i32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   ivec2 v = ivec2(0, 0);
 }

test/expressions/zero_init/vec2/u32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   uvec2 v = uvec2(0u, 0u);
 }

test/expressions/zero_init/vec3/bool.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   bvec3 v = bvec3(false, false, false);
 }

test/expressions/zero_init/vec3/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   vec3 v = vec3(0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/vec3/i32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   ivec3 v = ivec3(0, 0, 0);
 }

test/expressions/zero_init/vec3/u32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   uvec3 v = uvec3(0u, 0u, 0u);
 }

test/expressions/zero_init/vec4/bool.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   bvec4 v = bvec4(false, false, false, false);
 }

test/expressions/zero_init/vec4/f32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   vec4 v = vec4(0.0f, 0.0f, 0.0f, 0.0f);
 }

test/expressions/zero_init/vec4/i32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   ivec4 v = ivec4(0, 0, 0, 0);
 }

test/expressions/zero_init/vec4/u32.wgsl.expected.glsl

@@ -5,11 +5,6 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
-
-void main() {
-  unused_entry_point();
-}
-
 void f() {
   uvec4 v = uvec4(0u, 0u, 0u, 0u);
 }