Add GLSL Compatibility. (#3321)

* Parse glsl buffer blocks to GLSLInterfaceBlockDecl

* Parse glsl local size layout declarations

* Parse (and ignore) glsl version directives

* spelling

* Better l-value interpretation for glsl interface blocks

* Better l-value interpretation for glsl interface blocks

* Add compile flag for enabling glsl

* Parse and ignore precision modifiers.

* Automatically import `glsl` module for compatiblity.

* Complete vector and matrix types for glsl

* Remove generated file from repo

* Bump .gitignore

* do not mark out globals as params

* Synthesize entrypoint layout from global inout vars.

* update test result.

* Allow HLSL semantic on global variables.

* Fix.

* Fix test.

* Fix win32 compile error.

* Add more builtin input/output and texture intrinsics.

* Add struct/array constructor syntax.

* Skip `#extension` lines.

* overide operator * for matrix/vector multiplication.

* Add `matrixCompMult`.

* Parse modifiers in for loop init var declr.

* Add more glsl intrinsics, add stage into to var layout.

* Allow `int[3] x` syntax.

* Fix array type syntax.

---------

Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>
Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/glsl/loop-modifier.slang b/tests/glsl/loop-modifier.slang
new file mode 100644
index 000000000..e02ab5b8c
--- /dev/null
+++ b/tests/glsl/loop-modifier.slang
@@ -0,0 +1,14 @@
+//TEST:SIMPLE(filecheck=CHECK): -target spirv -stage vertex -entry main -allow-glsl
+#version 310 es
+layout(location = 0) in highp vec4 a_position;
+
+void main()
+{
+    vec4 a = 0;
+    for (highp int i = 0; i < 5; i++)
+        a += vec4(i);
+    gl_Position = a;
+   
+    // CHECK: OpEntryPoint
+}
+