Add llvm grammar (helix-editor#1167)

.gitmodules

@@ -146,3 +146,7 @@
 	path = helix-syntax/languages/tree-sitter-wgsl
 	url = https://github.com/szebniok/tree-sitter-wgsl
 	shallow = true
+[submodule "helix-syntax/tree-sitter-llvm"]
+	path = helix-syntax/languages/tree-sitter-llvm
+	url = https://github.com/benwilliamgraham/tree-sitter-llvm
+	shallow = true

book/src/themes.md

@@ -145,11 +145,12 @@ We use a similar set of scopes as
     - `conditional` - `if`, `else`
     - `repeat` - `for`, `while`, `loop`
     - `import` - `import`, `export`
-    - (TODO: return?)
+    - `return`
+  - `operator` - `or`, `in`
   - `directive` - Preprocessor directives (`#if` in C) 
   - `function` - `fn`, `func`
 
-- `operator` - `||`, `+=`, `>`, `or`
+- `operator` - `||`, `+=`, `>`
 
 - `function`
   - `builtin`

languages.toml

@@ -413,3 +413,11 @@ file-types = ["wgsl"]
 roots = []
 comment-token = "//"
 indent = { tab-width = 4, unit = "    " }
+
+[[language]]
+name = "llvm"
+scope = "source.llvm"
+roots = []
+file-types = ["ll"]
+comment-token = ";"
+indent = { tab-width = 2, unit = "  " }

runtime/queries/llvm/highlights.scm

@@ -0,0 +1,14 @@
+(type) @type
+(statement) @keyword.operator
+(number) @constant.numeric.integer
+(comment) @comment
+(string) @string
+(label) @label
+(keyword) @keyword
+"ret" @keyword.control.return
+(boolean) @constant.builtin.boolean
+(float) @constant.numeric.float
+(constant) @constant
+(identifier) @variable
+(symbol) @punctuation.delimiter
+(bracket) @punctuation.bracket