diff --git a/alloy.py b/alloy.py
index 4adb060d..238dd924 100755
--- a/alloy.py
+++ b/alloy.py
@@ -123,9 +123,6 @@ def build_LLVM(version_LLVM, revision, folder, tarball, debug, selfbuild, extra,
     if  version_LLVM == "3.2":
         SVN_PATH="tags/RELEASE_32/final"
         version_LLVM = "3_2"
-    if  version_LLVM == "3.1":
-        SVN_PATH="tags/RELEASE_31/final"
-        version_LLVM = "3_1"
     if revision != "":
         FOLDER_NAME = FOLDER_NAME + "_" + revision
         revision = "-" + revision
@@ -459,7 +456,7 @@ def validation_run(only, only_targets, reference_branch, number, notify, update,
             archs.append("x86-64")
         if "native" in only:
             sde_targets_t = []
-        for i in ["3.1", "3.2", "3.3", "3.4", "3.5", "trunk"]:
+        for i in ["3.2", "3.3", "3.4", "3.5", "trunk"]:
             if i in only:
                 LLVM.append(i)
         if "current" in only:
@@ -712,7 +709,7 @@ def Main():
         if os.environ.get("SMTP_ISPC") == None:
             error("you have no SMTP_ISPC in your environment for option notify", 1)
     if options.only != "":
-        test_only_r = " 3.1 3.2 3.3 3.4 3.5 trunk current build stability performance x86 x86-64 -O0 -O2 native "
+        test_only_r = " 3.2 3.3 3.4 3.5 trunk current build stability performance x86 x86-64 -O0 -O2 native "
         test_only = options.only.split(" ")
         for iterator in test_only:
             if not (" " + iterator + " " in test_only_r):
@@ -821,7 +818,7 @@ if __name__ == '__main__':
     llvm_group = OptionGroup(parser, "Options for building LLVM",
                     "These options must be used with -b option.")
     llvm_group.add_option('--version', dest='version',
-        help='version of llvm to build: 3.1 3.2 3.3 3.4 3.5 trunk. Default: trunk', default="trunk")
+        help='version of llvm to build: 3.2 3.3 3.4 3.5 trunk. Default: trunk', default="trunk")
     llvm_group.add_option('--revision', dest='revision',
         help='revision of llvm to build in format r172870', default="")
     llvm_group.add_option('--debug', dest='debug',
@@ -856,7 +853,7 @@ if __name__ == '__main__':
     run_group.add_option('--only', dest='only',
         help='set types of tests. Possible values:\n' + 
             '-O0, -O2, x86, x86-64, stability (test only stability), performance (test only performance)\n' +
-            'build (only build with different LLVM), 3.1, 3.2, 3.3, 3.4 3.5, trunk, native (do not use SDE), current (do not rebuild ISPC).',
+            'build (only build with different LLVM), 3.2, 3.3, 3.4 3.5, trunk, native (do not use SDE), current (do not rebuild ISPC).',
             default="")
     run_group.add_option('--perf_LLVM', dest='perf_llvm',
         help='compare LLVM 3.3 with "--compare-with", default trunk', default=False, action='store_true')
diff --git a/run_tests.py b/run_tests.py
index 8644545a..363ae5cd 100755
--- a/run_tests.py
+++ b/run_tests.py
@@ -481,7 +481,7 @@ def verify():
     f_lines = f.readlines()
     f.close()
     check = [["g++", "clang++", "cl"],["-O0", "-O2"],["x86","x86-64"],
-             ["Linux","Windows","Mac"],["LLVM 3.1","LLVM 3.2","LLVM 3.3","LLVM 3.4","LLVM trunk"],
+             ["Linux","Windows","Mac"],["LLVM 3.2","LLVM 3.3","LLVM 3.4","LLVM 3.5","LLVM trunk"],
              ["sse2-i32x4", "sse2-i32x8", "sse4-i32x4", "sse4-i32x8", "sse4-i16x8",
               "sse4-i8x16", "avx1-i32x4" "avx1-i32x8", "avx1-i32x16", "avx1-i64x4", "avx1.1-i32x8",
               "avx1.1-i32x16", "avx1.1-i64x4", "avx2-i32x8", "avx2-i32x16", "avx2-i64x4",