Add default JIT LIT variable.

Patch by David Tweed!

llvm-svn: 164996

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

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

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

llvm/test/lit.cfg

@@ -143,6 +143,11 @@ if config.test_exec_root is None:
 # 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':