Repository: ggml-org/llama.cpp
Pull request: scripts: hip: gcn-cdna-vgpr-check: fix parsing of vgpr counts

The amdclang Remark block in the build logs can be interleaved with another from a different compile process, so we need to associate the vgpr counts with the right function by matching the file and line numbers, otherwise the script can flag the wrong functions randomly or miss some entirely.

# Requirements

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- I have read and agree with the [contributing guidelines](https://github.com/ggml-org/llama.cpp/blob/master/CONTRIBUTING.md)
- AI usage disclosure: Yes Ai was used to come up with the regex for this pr, original script was partially generated too.<!-- mention: YES / NO - if yes, describe how AI was used -->

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Changed files:
filename: .github/workflows/hip-quality-check.yml
patch: @@ -8,15 +8,17 @@ on:
     paths: [
       '.github/workflows/hip-quality-check.yml',
       '**/*.cu',
-      '**/*.cuh'
+      '**/*.cuh',
+      'scripts/hip/gcn-cdna-vgpr-check.py'
     ]
 
   pull_request:
     types: [opened, synchronize, reopened]
     paths: [
       '.github/workflows/hip-quality-check.yml',
       '**/*.cu',
-      '**/*.cuh'
+      '**/*.cuh',
+      'scripts/hip/gcn-cdna-vgpr-check.py'
     ]
 
 concurrency:

filename: scripts/hip/gcn-cdna-vgpr-check.py
patch: @@ -2,45 +2,59 @@
 
 import sys
 from collections import defaultdict
+import re
 
 
 def parse_log_file(filepath):
-    """Parse log file and extract function VGPR usage."""
-    import re
-
     functions = defaultdict(lambda: {'vgprs': 0, 'spill': 0, 'location': ''})
+    func_stack = []
 
     try:
         with open(filepath, 'r') as f:
-            content = f.read()
-            # Find all function entries with VGPR usage including location
-            pattern = r'([^:]+:\d+):.*?Function Name: (\S+).*?VGPRs: (\d+).*?VGPRs Spill: (\d+)'
-            matches = re.findall(pattern, content, re.DOTALL)
-
-            for location, func_name, vgprs, spill in matches:
-                functions[func_name]['vgprs'] = int(vgprs)
-                functions[func_name]['spill'] = int(spill)
-                # Extract just the filename and line number
-                parts = location.split('/')
-                if len(parts) > 0:
-                    short_location = parts[-1]  # Get last part (filename)
-                    # Check if there's a line number after filename
-                    if ':' in short_location:
-                        functions[func_name]['location'] = short_location
-                    else:
-                        functions[func_name]['location'] = location
-                else:
-                    functions[func_name]['location'] = location
+            for line in f:
+                # Match function name lines
+                func_match = re.search(r'remark: ([^:]+):(\d+):\d+: Function Name: (\S+)', line)
+                if func_match:
+                    location = func_match.group(1) + ':' + func_match.group(2)
+                    func_name = func_match.group(3)
+                    # Extract just the filename and line number
+                    parts = location.split('/')
+                    short_location = parts[-1] if len(parts) > 0 else location
+                    functions[func_name]['location'] = short_location
+                    # Push function onto stack with its location
+                    func_stack.append({'name': func_name, 'location': location})
+                    continue
+
+                # Match VGPR usage lines (only if we have functions in stack)
+                vgpr_match = re.search(r'remark: ([^:]+):(\d+):\d+:\s+VGPRs: (\d+)', line)
+                if vgpr_match:
+                    location = vgpr_match.group(1) + ':' + vgpr_match.group(2)
+                    # Find the most recent function with matching location
+                    for i in range(len(func_stack) - 1, -1, -1):
+                        if func_stack[i]['location'] == location:
+                            functions[func_stack[i]['name']]['vgprs'] = int(vgpr_match.group(3))
+                            break
+                    continue
+
+                spill_match = re.search(r'remark: ([^:]+):(\d+):\d+:\s+VGPRs Spill: (\d+)', line)
+                if spill_match:
+                    location = spill_match.group(1) + ':' + spill_match.group(2)
+                    # Find the most recent function with matching location
+                    for i in range(len(func_stack) - 1, -1, -1):
+                        if func_stack[i]['location'] == location:
+                            functions[func_stack[i]['name']]['spill'] = int(spill_match.group(3))
+                            break
+                    continue
     except FileNotFoundError:
-        print(f"Error: File {filepath} not found", file=sys.stderr) # noqa: NP100
+        print(f"Error: File {filepath} not found", file=sys.stderr)  # noqa: NP100
         sys.exit(1)
 
     return functions
 
 
 def main():
     if len(sys.argv) < 2:
-        print("Usage: ./vgpr_check.py <log_file>", file=sys.stderr) # noqa: NP100
+        print("Usage: ./vgpr_check.py <log_file>", file=sys.stderr)  # noqa: NP100
         sys.exit(1)
 
     log_file = sys.argv[1]
@@ -123,6 +137,9 @@ def main():
         '_ZL18flash_attn_ext_f16ILi128ELi128ELi32ELi2ELb1ELb0EEvPKcS1_S1_S1_S1_PKiPfP15HIP_vector_typeIfLj2EEffffjfiS5_IjLj3EEiiiiiiiiiiiliiliiiiil',
         '_ZL18flash_attn_ext_f16ILi128ELi128ELi4ELi8ELb1ELb0EEvPKcS1_S1_S1_S1_PKiPfP15HIP_vector_typeIfLj2EEffffjfiS5_IjLj3EEiiiiiiiiiiiliiliiiiil',
         '_ZL18flash_attn_ext_f16ILi96ELi96ELi4ELi8ELb0ELb0EEvPKcS1_S1_S1_S1_PKiPfP15HIP_vector_typeIfLj2EEffffjfiS5_IjLj3EEiiiiiiiiiiiliiliiiiil',
+        '_ZL18flash_attn_ext_vecILi128ELi2EL9ggml_type2ELS0_2ELb0EEvPKcS2_S2_S2_S2_PKiPfP15HIP_vector_typeIfLj2EEffffjfiS6_IjLj3EEiiiiiiiiiiiliiliiiiil',
+        '_ZL9mul_mat_qIL9ggml_type10ELi16ELb1EEvPKcPKiS4_S4_PfS5_iiiiiiiiiiiiiiiii',
+        '_ZL9mul_mat_qIL9ggml_type12ELi128ELb1EEvPKcPKiS4_S4_PfS5_iiiiiiiiiiiiiiiii'
     }
 
     functions = parse_log_file(log_file)
@@ -134,7 +151,7 @@ def main():
         total_vgprs = int(data['vgprs']) + int(data['spill'])
         if total_vgprs > 256 and func_name in ignored and func_name not in printed_ignored:
             location = data.get('location', log_file)
-            print(f"{location}: {func_name} - Total VGPRs: {total_vgprs} ({data['vgprs']} + {data['spill']}) [IGNORED]") # noqa: NP100
+            print(f"{location}: {func_name} - Total VGPRs: {total_vgprs} ({data['vgprs']} + {data['spill']}) [IGNORED]")  # noqa: NP100
             printed_ignored.add(func_name)
 
     # Then print new functions with issues in red
@@ -146,7 +163,7 @@ def main():
             # Print in red if not ignored
             color_code = "\033[91m" if func_name not in ignored else ""
             reset_code = "\033[0m" if func_name not in ignored else ""
-            print(f"{color_code}{location}: {func_name} - Total VGPRs: {total_vgprs} ({data['vgprs']} + {data['spill']}) {status}{reset_code}") # noqa: NP100
+            print(f"{color_code}{location}: {func_name} - Total VGPRs: {total_vgprs} ({data['vgprs']} + {data['spill']}) {status}{reset_code}")  # noqa: NP100
             if func_name not in ignored:
                 found_issues = True