X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=utils%2Ffindmisopt;h=24052209428cf96fec35bcc57aebc6de3a1140dc;hp=955c0c003058a02bc4b5a8a6a7a4cf7fdaa58e94;hb=2ec5a319cacb9e13bf20bc8b9113d11212f10aae;hpb=5b31cf0f9f53b08bed1e792aade56ef6d7c87e27

diff --git a/utils/findmisopt b/utils/findmisopt
index 955c0c00305..24052209428 100755
--- a/utils/findmisopt
+++ b/utils/findmisopt
@@ -7,7 +7,7 @@
 #      it from finding a problem unless the set of failing optimizations are
 #      known and given to it on the command line.
 #
-#      Given a bytecode file that produces correct output (or return code), 
+#      Given a bitcode file that produces correct output (or return code), 
 #      this script will run through all the optimizations passes that gccas
 #      uses (in the same order) and will narrow down which optimizations
 #      cause the program either generate different output or return a 
@@ -21,11 +21,13 @@
 #
 #   Where:
 #      bcfile 
-#          is the bytecode file input (the unoptimized working case)
+#          is the bitcode file input (the unoptimized working case)
 #      outdir
 #          is a directory into which intermediate results are placed
 #      progargs
 #          is a single argument containing all the arguments the program needs
+#      proginput
+#          is a file name from which stdin should be directed
 #      match
 #          if specified to any value causes the result code of the program to
 #          be used to determine success/fail. If not specified success/fail is
@@ -50,7 +52,11 @@ fi
 bcfile="$1"
 outdir="$2"
 args="$3"
-match="$4"
+input="$4"
+if [ ! -f "$input" ] ; then
+  input="/dev/null"
+fi
+match="$5"
 name=`basename $bcfile .bc`
 ll="$outdir/${name}.ll"
 s="$outdir/${name}.s"
@@ -61,11 +67,18 @@ optll="$outdir/${name}.opt.ll"
 opts="$outdir/${name}.opt.s"
 optprog="$outdir/${name}.opt"
 optout="$outdir/${name}.opt.out"
+ldflags="-lstdc++ -lm -ldl -lc"
 
 echo "Test Name: $name"
 echo "Unoptimized program: $prog"
 echo "  Optimized program: $optprog"
 
+# Define the list of optimizations to run. This comprises the same set of 
+# optimizations that opt -O3 runs, in the same order.
+opt_switches=`llvm-as < /dev/null -o - | opt -O3 -disable-output -debug-pass=Arguments 2>&1 | sed 's/Pass Arguments: //'`
+all_switches="$opt_switches"
+echo "Passes : $all_switches"
+
 # Create output directory if it doesn't exist
 if [ -f "$outdir" ] ; then
   echo "$outdir is not a directory"
@@ -79,16 +92,11 @@ fi
 # Generate the disassembly
 llvm-dis "$bcfile" -o "$ll" -f || exit 1
 
-# Generate the non-optimized program
+# Generate the non-optimized program and its output
 llc "$bcfile" -o "$s" -f || exit 1
-gcc "$s" -o "$prog" -lstdc++ -lc -lm || exit 1
-
-# Define the list of optimizations to run. This comprises the same set of 
-# optimizations that gccas and gccld run, in the same order.
-all_switches="-verify -lowersetjmp -funcresolve -raiseallocs -simplifycfg -mem2reg -globalopt -globaldce -ipconstprop -deadargelim -instcombine -simplifycfg -prune-eh -inline -simplify-libcalls -argpromotion -raise -tailduplicate -simplifycfg -scalarrepl -instcombine -predsimplify -condprop -tailcallelim -simplifycfg -reassociate -licm -loop-unswitch -instcombine -indvars -loop-unroll -instcombine -load-vn -gcse -sccp -instcombine -condprop -dse -dce -simplifycfg -deadtypeelim -constmerge -funcresolve -internalize -ipsccp -globalopt -constmerge -deadargelim -inline -prune-eh -globalopt -globaldce -argpromotion -instcombine -predsimplify -scalarrepl -globalsmodref-aa -licm -load-vn -gcse -dse -instcombine -simplifycfg -verify"
-# Here's an alternative list of optimizations comprising just the ones that 
-# gccld uses. To use, just comment out the line above, and uncomment this one
-#all_switches="-funcresolve -internalize -ipsccp -globalopt -constmerge -deadargelim -inline -prune-eh -globalopt -globaldce -argpromotion -instcombine -predsimplify -scalarrepl -globalsmodref-aa -licm -load-vn -gcse -dse -instcombine -simplifycfg -verify"
+gcc "$s" -o "$prog" $ldflags || exit 1
+"$prog" $args > "$out" 2>&1 <$input
+ex1=$?
 
 # Current set of switches is empty
 function tryit {
@@ -96,10 +104,8 @@ function tryit {
   opt $switches_to_use "$bcfile" -o "$optbc" -f || exit
   llvm-dis "$optbc" -o "$optll" -f || exit
   llc "$optbc" -o "$opts" -f || exit
-  gcc "$opts" -o "$optprog" -lstdc++ -lc -lm || exit
-  "$prog" $args > "$out" 2>&1
-  ex1=$?
-  "$optprog" $args > "$optout" 2>&1
+  gcc "$opts" -o "$optprog" $ldflags || exit
+  "$optprog" $args > "$optout" 2>&1 <"$input"
   ex2=$?
 
   if [ -n "$match" ] ; then
@@ -116,7 +122,7 @@ function tryit {
       echo "Diff fails with these switches:"
       echo $switches
       echo "Differences:"
-      diff "$out" "$optout" 
+      diff "$out" "$optout" | head
       return 0;
     fi
   fi
@@ -132,6 +138,15 @@ for sw in $all_switches ; do
   fi
 done
 
+# Terminate the previous output with a newline
+echo ""
+
+# Determine if we're done because none of the optimizations broke the program
+if [ "$switches" == " $all_switches" ] ; then
+  echo "The program did not miscompile"
+  exit 0
+fi
+
 final=""
 while [ ! -z "$switches" ] ; do
   trimmed=`echo "$switches" | sed -e 's/^ *\(-[^ ]*\).*/\1/'`