Add default JIT LIT variable.

Patch by David Tweed!

llvm-svn: 164996
diff --git a/llvm/test/Analysis/Profiling/load-branch-weights-ifs.ll b/llvm/test/Analysis/Profiling/load-branch-weights-ifs.ll
index ddbaf96..7ed090b 100644
--- a/llvm/test/Analysis/Profiling/load-branch-weights-ifs.ll
+++ b/llvm/test/Analysis/Profiling/load-branch-weights-ifs.ll
@@ -1,6 +1,6 @@
 ; RUN: opt -insert-edge-profiling -o %t1 < %s
 ; RUN: rm -f %t1.prof_data
-; RUN: lli -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
+; RUN: lli %defaultjit -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
 ; RUN:     -llvmprof-output %t1.prof_data
 ; RUN: opt -profile-file %t1.prof_data -profile-metadata-loader -S -o - < %s \
 ; RUN:     | FileCheck %s
diff --git a/llvm/test/Analysis/Profiling/load-branch-weights-loops.ll b/llvm/test/Analysis/Profiling/load-branch-weights-loops.ll
index 476f377..9d1925a 100644
--- a/llvm/test/Analysis/Profiling/load-branch-weights-loops.ll
+++ b/llvm/test/Analysis/Profiling/load-branch-weights-loops.ll
@@ -1,6 +1,6 @@
 ; RUN: opt -insert-edge-profiling -o %t1 < %s
 ; RUN: rm -f %t1.prof_data
-; RUN: lli -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
+; RUN: lli %defaultjit -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
 ; RUN:     -llvmprof-output %t1.prof_data
 ; RUN: opt -profile-file %t1.prof_data -profile-metadata-loader -S -o - < %s \
 ; RUN:     | FileCheck %s
diff --git a/llvm/test/Analysis/Profiling/load-branch-weights-switches.ll b/llvm/test/Analysis/Profiling/load-branch-weights-switches.ll
index be11f04..5587c71 100644
--- a/llvm/test/Analysis/Profiling/load-branch-weights-switches.ll
+++ b/llvm/test/Analysis/Profiling/load-branch-weights-switches.ll
@@ -1,6 +1,6 @@
 ; RUN: opt -insert-edge-profiling -o %t1 < %s
 ; RUN: rm -f %t1.prof_data
-; RUN: lli -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
+; RUN: lli %defaultjit -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
 ; RUN:     -llvmprof-output %t1.prof_data
 ; RUN: opt -profile-file %t1.prof_data -profile-metadata-loader -S -o - < %s \
 ; RUN:     | FileCheck %s
diff --git a/llvm/test/lit.cfg b/llvm/test/lit.cfg
index 6f44bb3..b7c5f3e 100644
--- a/llvm/test/lit.cfg
+++ b/llvm/test/lit.cfg
@@ -143,6 +143,11 @@
 # triple so we can check it with XFAIL and XTARGET.
 config.target_triple += lit.valgrindTriple
 
+# Provide a substition for those tests that need to run the jit to obtain data
+# but simply want use the currently considered most reliable jit for platform
+defaultIsMCJIT='true' if 'arm' in config.target_triple else 'false'
+config.substitutions.append( ('%defaultjit', '-use-mcjit='+defaultIsMCJIT) )
+
 # Process jit implementation option
 jit_impl_cfg = lit.params.get('jit_impl', None)
 if jit_impl_cfg == 'mcjit':