llama : recognize IBM Granite 3.3 FIM tokens (#12988)

The Granite's FIM tokens are very similar to Qwen's; it's just that
they use underscore instead of a dash. So <fim_middle> for example
instead of <fim-middle>.

Opening up tokenizer_config.json in ibm-granite/granite-3.3-8b-base
shows:

```
    "<fim_prefix>",
    "<fim_middle>",
    "<fim_suffix>",
    "<fim_pad>",
    ...
    "<reponame>",
```

diff --git a/src/llama-vocab.cpp b/src/llama-vocab.cpp
index 464ff01e06fe181135f31319ac6cda36e676fe49..480605173dd910129218d8f2b75589ba1ebf37d0 100644 (file)
--- a/src/llama-vocab.cpp
+++ b/src/llama-vocab.cpp
@@ -1841,6 +1841,7 @@ void llama_vocab::impl::load(llama_model_loader & ml, const LLM_KV & kv) {
                 if (false
                         || t.first == "<|fim_prefix|>"  // Qwen
                         || t.first == "<fim-prefix>"
+                        || t.first == "<fim_prefix>"    // Granite
                         || t.first == "<｜fim▁begin｜>" // DeepSeek
                         || t.first == "<PRE>"
                         || t.first == "▁<PRE>"          // CodeLlama
@@ -1859,6 +1860,7 @@ void llama_vocab::impl::load(llama_model_loader & ml, const LLM_KV & kv) {
                 if (false
                         || t.first == "<|fim_suffix|>" // Qwen
                         || t.first == "<fim-suffix>"
+                        || t.first == "<fim_suffix>"   // Granite
                         || t.first == "<｜fim▁hole｜>" // DeepSeek
                         || t.first == "<SUF>"
                         || t.first == "▁<SUF>"         // CodeLlama
@@ -1877,6 +1879,7 @@ void llama_vocab::impl::load(llama_model_loader & ml, const LLM_KV & kv) {
                 if (false
                         || t.first == "<|fim_middle|>" // Qwen
                         || t.first == "<fim-middle>"
+                        || t.first == "<fim_middle>"   // Granite
                         || t.first == "<｜fim▁end｜>"  // DeepSeek
                         || t.first == "<MID>"
                         || t.first == "▁<MID>"         // CodeLlama
@@ -1895,6 +1898,7 @@ void llama_vocab::impl::load(llama_model_loader & ml, const LLM_KV & kv) {
                 if (false
                         || t.first == "<|fim_pad|>" // Qwen
                         || t.first == "<fim-pad>"
+                        || t.first == "<fim_pad>"   // Granite
                         || t.first == "<PAD>"
                         ) {
                     special_fim_pad_id = t.second;
@@ -1913,6 +1917,7 @@ void llama_vocab::impl::load(llama_model_loader & ml, const LLM_KV & kv) {
                         || t.first == "<|repo_name|>"
                         || t.first == "<fim-repo>"
                         || t.first == "<REPO>"
+                        || t.first == "<reponame>"    // Granite
                         ) {
                     special_fim_rep_id = t.second;
                     if ((id_to_token[t.second].attr & LLAMA_TOKEN_ATTR_CONTROL) == 0) {