From 067e2e2adb0c1e857b0ff5c25403a7585d7f9fad Mon Sep 17 00:00:00 2001
From: Duncan Sands <baldrick@free.fr>
Date: Fri, 25 Mar 2011 07:17:44 +0000
Subject: [PATCH] Useful script for finding regressions in the nightly
 testsuite. I think it was written by Pawel Worach.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128268 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/release/findRegressions.py | 130 +++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100755 utils/release/findRegressions.py

diff --git a/utils/release/findRegressions.py b/utils/release/findRegressions.py
new file mode 100755
index 00000000000..e801dab4aba
--- /dev/null
+++ b/utils/release/findRegressions.py
@@ -0,0 +1,130 @@
+#!/usr/bin/python
+import re, string, sys, os, time
+
+DEBUG = 0
+testDirName = 'llvm-test'
+test      = ['compile', 'llc', 'jit', 'cbe']
+exectime     = ['llc-time', 'jit-time', 'cbe-time',]
+comptime     = ['llc', 'jit-comptime', 'compile']
+
+(tp, exp) = ('compileTime_', 'executeTime_')
+
+def parse(file):
+  f=open(file, 'r')
+  d = f.read()
+  
+  #Cleanup weird stuff
+  d = re.sub(r',\d+:\d','', d)
+   
+  r = re.findall(r'TEST-(PASS|FAIL|RESULT.*?):\s+(.*?)\s+(.*?)\r*\n', d)
+   
+  test = {}
+  fname = ''
+  for t in r:
+    if DEBUG:
+      print t
+    if t[0] == 'PASS' or t[0] == 'FAIL' :
+      tmp = t[2].split(testDirName)
+      
+      if DEBUG:
+        print tmp
+      
+      if len(tmp) == 2:
+        fname = tmp[1].strip('\r\n')
+      else:
+        fname = tmp[0].strip('\r\n')
+      
+      if not test.has_key(fname) :
+        test[fname] = {}
+      
+      for k in test:
+        test[fname][k] = 'NA'
+        test[fname][t[1]] = t[0]
+        if DEBUG:
+          print test[fname][t[1]]
+    else :
+      try:
+        n = t[0].split('RESULT-')[1]
+        
+        if DEBUG:
+          print n;
+        
+        if n == 'llc' or n == 'jit-comptime' or n == 'compile':
+          test[fname][tp + n] = float(t[2].split(' ')[2])
+          if DEBUG:
+            print test[fname][tp + n]
+        
+        elif n.endswith('-time') :
+            test[fname][exp + n] = float(t[2].strip('\r\n'))
+            if DEBUG:
+              print test[fname][exp + n]
+        
+        else :
+          print "ERROR!"
+          sys.exit(1)
+      
+      except:
+          continue
+
+  return test
+
+# Diff results and look for regressions.
+def diffResults(d_old, d_new):
+
+  for t in sorted(d_old.keys()) :
+    if DEBUG:
+      print t
+        
+    if d_new.has_key(t) :
+    
+      # Check if the test passed or failed.
+      for x in test:
+        if d_old[t].has_key(x):
+          if d_new[t].has_key(x):
+            if d_old[t][x] == 'PASS':
+              if d_new[t][x] != 'PASS':
+                print t + " *** REGRESSION (" + x + ")\n"
+            else:
+              if d_new[t][x] == 'PASS':
+                print t + " * NEW PASS (" + x + ")\n"
+                
+          else :
+            print t + "*** REGRESSION (" + x + ")\n"
+        
+        # For execution time, if there is no result, its a fail.
+        for x in exectime:
+          if d_old[t].has_key(tp + x):
+            if not d_new[t].has_key(tp + x):
+              print t + " *** REGRESSION (" + tp + x + ")\n"
+                
+          else :
+            if d_new[t].has_key(tp + x):
+              print t + " * NEW PASS (" + tp + x + ")\n"
+
+       
+        for x in comptime:
+          if d_old[t].has_key(exp + x):
+            if not d_new[t].has_key(exp + x):
+              print t + " *** REGRESSION (" + exp + x + ")\n"
+                
+          else :
+            if d_new[t].has_key(exp + x):
+              print t + " * NEW PASS (" + exp + x + ")\n"
+              
+    else :
+      print t + ": Removed from test-suite.\n"
+    
+
+#Main
+if len(sys.argv) < 3 :
+    print 'Usage:', sys.argv[0], \
+          '<old log> <new log>'
+    sys.exit(-1)
+
+d_old = parse(sys.argv[1])
+d_new = parse(sys.argv[2])
+
+
+diffResults(d_old, d_new)
+
+