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Diffstat (limited to 'contrib/llvm/utils/findoptdiff')
| -rwxr-xr-x | contrib/llvm/utils/findoptdiff | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/contrib/llvm/utils/findoptdiff b/contrib/llvm/utils/findoptdiff deleted file mode 100755 index 4f8d08d..0000000 --- a/contrib/llvm/utils/findoptdiff +++ /dev/null @@ -1,101 +0,0 @@ -#!/bin/bash -# -# findoptdiff -# -# This script helps find the optimization difference between two llvm -# builds. It is useful when you have a build that is known to work and -# one that exhibits an optimization problem. Identifying the difference -# between the two builds can lead to discovery of the source of a -# mis-optimization. -# -# The script takes two llvm build paths as arguments. These specify the -# the two llvm builds to compare. It is generally expected that they -# are "close cousins". That is, they are the same except that the -# second build contains some experimental optimization features that -# are suspected of producing a misoptimization. -# -# The script takes two bytecode files, one from each build. They are -# presumed to be a compilation of the same program or program fragment -# with the only difference being the builds. -# -# The script operates by iteratively applying the optimizations that gccas -# and gccld run until there is a difference in the assembly resulting -# from the optimization. The difference is then reported with the set of -# optimization passes that produce the difference. The processing -# continues until all optimization passes have been tried. The differences -# for each pass, if they do differ, are placed in a diffs.# file. -# -# To work around differences in the assembly language format, the script -# can also take two filter arguments that post-process the assembly -# so they can be differenced without making false positives for known -# differences in the two builds. These filters are optional. -# -# Usage: -# findoptdiff llvm1 llvm2 bc1 bc2 filter1 filter2 -# -# Where: -# llvm1 -# is the path to the first llvm build dir -# llvm2 -# is the path to the second llvm build dir -# bc1 -# is the bytecode file for the first llvm environment -# bc2 -# is the bytecode file for the second llvm environment -# filter1 -# is an optional filter for filtering the llvm1 generated assembly -# filter2 -# is an optional filter for filtering the llvm2 generated assembly -# -llvm1=$1 -llvm2=$2 -bc1=$3 -bc2=$4 -filt1=$5 -filt2=$6 -if [ -z "$filt1" ] ; then - filt1="cat" -fi -if [ -z "$filt2" ] ; then - filt2="cat" -fi -opt1="${bc1}.opt" -opt2="${bc2}.opt" -ll1="${bc1}.ll" -ll2="${bc2}.ll" -opt1ll="${bc1}.opt.ll" -opt2ll="${bc2}.opt.ll" -dis1="$llvm1/Debug/bin/llvm-dis" -dis2="$llvm2/Debug/bin/llvm-dis" -opt1="$llvm1/Debug/bin/opt" -opt2="$llvm2/Debug/bin/opt" - -all_switches="-verify -lowersetjmp -simplifycfg -mem2reg -globalopt -globaldce -ipconstprop -deadargelim -instcombine -simplifycfg -prune-eh -inline -simplify-libcalls -argpromotion -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 -internalize -ipsccp -globalopt -constmerge -deadargelim -inline -prune-eh -globalopt -globaldce -argpromotion -instcombine -predsimplify -scalarrepl -globalsmodref-aa -licm -load-vn -gcse -dse -instcombine -simplifycfg -verify" - -#counter=0 -function tryit { - switches_to_use="$1" - $opt1 $switches_to_use "$bc1" -o - | $dis1 | $filt1 > "$opt1ll" - $opt2 $switches_to_use "$bc2" -o - | $dis2 | $filt2 > "$opt2ll" - diffs="diffs."$((counter++)) - diff "$opt1ll" "$opt2ll" > $diffs - if [ $? -ne 0 ] ; then - echo - echo "Diff fails with these switches:" - echo $switches - echo "Differences:" - head $diffs - echo 'Switches:' $switches_to_use >> $diffs - else - rm $diffs - fi - return 1 -} - -for sw in $all_switches ; do - echo -n " $sw" - switches="$switches $sw" - if tryit "$switches" ; then - break; - fi -done |
