mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-12-05 02:07:56 +00:00
7ce13be5bb
the list of link time passes to be run, just as for opt, with the -debug-pass=Arguments option. llvm-svn: 41040
179 lines
5.2 KiB
Bash
Executable File
179 lines
5.2 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# findmisopt
|
|
#
|
|
# This is a quick and dirty hack to potentially find a misoptimization
|
|
# problem. Mostly its to work around problems in bugpoint that prevent
|
|
# 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),
|
|
# 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
|
|
# different result code. When the passes have been narrowed down,
|
|
# bugpoint is invoked to further refine the problem to its origin. If a
|
|
# release version of bugpoint is available it will be used, otherwise
|
|
# debug.
|
|
#
|
|
# Usage:
|
|
# findmisopt bcfile outdir progargs [match]
|
|
#
|
|
# Where:
|
|
# bcfile
|
|
# is the bytecode 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
|
|
# determined by diffing the program's output with the non-optimized
|
|
# output.
|
|
#
|
|
if [ "$#" -lt 3 ] ; then
|
|
echo "usage: findmisopt bcfile outdir progargs [match]"
|
|
exit 1
|
|
fi
|
|
|
|
dir="${0%%/utils/findmisopt}"
|
|
if [ -x "$dir/Release/bin/bugpoint" ] ; then
|
|
bugpoint="$dir/Release/bin/bugpoint"
|
|
elif [ -x "$dir/Debug/bin/bugpoint" ] ; then
|
|
bugpoint="$dir/Debug/bin/bugpoint"
|
|
else
|
|
echo "findmisopt: bugpoint not found"
|
|
exit 1
|
|
fi
|
|
|
|
bcfile="$1"
|
|
outdir="$2"
|
|
args="$3"
|
|
input="$4"
|
|
if [ ! -f "$input" ] ; then
|
|
input="/dev/null"
|
|
fi
|
|
match="$5"
|
|
name=`basename $bcfile .bc`
|
|
ll="$outdir/${name}.ll"
|
|
s="$outdir/${name}.s"
|
|
prog="$outdir/${name}"
|
|
out="$outdir/${name}.out"
|
|
optbc="$outdir/${name}.opt.bc"
|
|
optll="$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: $optprog"
|
|
|
|
# Define the list of optimizations to run. This comprises the same set of
|
|
# optimizations that opt -std-compile-opts and gccld run, in the same order.
|
|
opt_switches=`llvm-as < /dev/null -o - | opt -std-compile-opts -disable-output -debug-pass=Arguments 2>&1 | sed 's/Pass Arguments: //'`
|
|
ld_switches=`llvm-as < /dev/null -o - | llvm-ld - -debug-pass=Arguments 2>&1 | sed 's/Pass Arguments: //'`
|
|
all_switches="$opt_switches $ld_switches"
|
|
echo "Passes : $all_switches"
|
|
|
|
# Create output directory if it doesn't exist
|
|
if [ -f "$outdir" ] ; then
|
|
echo "$outdir is not a directory"
|
|
exit 1
|
|
fi
|
|
|
|
if [ ! -d "$outdir" ] ; then
|
|
mkdir "$outdir" || exit 1
|
|
fi
|
|
|
|
# Generate the disassembly
|
|
llvm-dis "$bcfile" -o "$ll" -f || exit 1
|
|
|
|
# Generate the non-optimized program and its output
|
|
llc "$bcfile" -o "$s" -f || exit 1
|
|
gcc "$s" -o "$prog" $ldflags || exit 1
|
|
"$prog" $args > "$out" 2>&1 <$input
|
|
ex1=$?
|
|
|
|
# Current set of switches is empty
|
|
function tryit {
|
|
switches_to_use="$1"
|
|
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" $ldflags || exit
|
|
"$optprog" $args > "$optout" 2>&1 <"$input"
|
|
ex2=$?
|
|
|
|
if [ -n "$match" ] ; then
|
|
if [ "$ex1" -ne "$ex2" ] ; then
|
|
echo "Return code not the same with these switches:"
|
|
echo $switches
|
|
echo "Unoptimized returned: $ex1"
|
|
echo "Optimized returned: $ex2"
|
|
return 0
|
|
fi
|
|
else
|
|
diff "$out" "$optout" > /dev/null
|
|
if [ $? -ne 0 ] ; then
|
|
echo "Diff fails with these switches:"
|
|
echo $switches
|
|
echo "Differences:"
|
|
diff "$out" "$optout" | head
|
|
return 0;
|
|
fi
|
|
fi
|
|
return 1
|
|
}
|
|
|
|
echo "Trying to find optimization that breaks program:"
|
|
for sw in $all_switches ; do
|
|
echo -n " $sw"
|
|
switches="$switches $sw"
|
|
if tryit "$switches" ; then
|
|
break;
|
|
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/'`
|
|
switches=`echo "$switches" | sed -e 's/^ *-[^ ]* *//'`
|
|
echo "Trimmed $trimmed from left"
|
|
tryit "$final $switches"
|
|
if [ "$?" -eq "0" ] ; then
|
|
echo "Still Failing .. continuing ..."
|
|
continue
|
|
else
|
|
echo "Found required early pass: $trimmed"
|
|
final="$final $trimmed"
|
|
continue
|
|
fi
|
|
echo "Next Loop"
|
|
done
|
|
|
|
if [ "$final" == " $all_switches" ] ; then
|
|
echo "findmisopt: All optimizations pass. Perhaps this isn't a misopt?"
|
|
exit 0
|
|
fi
|
|
echo "Smallest Optimization list=$final"
|
|
|
|
bpcmd="$bugpoint -run-llc -disable-loop-extraction --output "$out" --input /dev/null $bcfile $final --args $args"
|
|
|
|
echo "Running: $bpcmd"
|
|
$bpcmd
|
|
echo "findmisopt finished."
|