#!/usr/bin/perl -w # # Program: profile.pl # # Synopsis: Insert instrumentation code into a program, run it with the JIT, # then print out a profile report. # # Syntax: profile.pl [OPTIONS] bytecodefile <arguments> # # OPTIONS may include one or more of the following: # -block - Enable basicblock profiling # -edge - Enable edge profiling # -function - Enable function profiling # -o <filename> - Emit profiling information to the specified file, instead # of llvmprof.out # # Any unrecognized options are passed into the invocation of llvm-prof # my $ProfilePass = "-insert-edge-profiling"; my $LLVMProfOpts = ""; my $ProgramOpts = ""; my $ProfileFile = ""; # Parse arguments... while (scalar(@ARGV) and ($_ = $ARGV[0], /^[-+]/)) { shift; last if /^--$/; # Stop processing arguments on -- # List command line options here... if (/^-?-block$/) { $ProfilePass = "-insert-block-profiling"; next; } if (/^-?-edge$/) { $ProfilePass = "-insert-edge-profiling"; next; } if (/^-?-function$/) { $ProfilePass = "-insert-function-profiling"; next; } if (/^-?-o$/) { # Read -o filename... die "-o option requires a filename argument!" if (!scalar(@ARGV)); $ProgramOpts .= " -llvmprof-output $ARGV[0]"; $ProfileFile = $ARGV[0]; shift; next; } if (/^-?-help$/) { print "OVERVIEW: profile.pl - Instrumentation and profile printer.\n\n"; print "USAGE: profile.pl [options] program.bc <program args>\n\n"; print "OPTIONS:\n"; print " -block - Enable basicblock profiling\n"; print " -edge - Enable edge profiling\n"; print " -function - Enable function profiling\n"; print " -o <file> - Specify an output file other than llvm-prof.out.\n"; print " -help - Print this usage information\n"; print "\nAll other options are passed into llvm-prof.\n"; exit 1; } # Otherwise, pass the option on to llvm-prof $LLVMProfOpts .= " " . $_; } die "Must specify LLVM bytecode file as first argument!" if (@ARGV == 0); my $BytecodeFile = $ARGV[0]; shift @ARGV; my $libdir = `llvm-config --libdir`; chomp $libdir; my $LibProfPath = $libdir . "/profile_rt.so"; system "opt -q -f $ProfilePass $BytecodeFile -o $BytecodeFile.inst"; system "lli -fake-argv0 '$BytecodeFile' -load $LibProfPath " . "$BytecodeFile.inst $ProgramOpts " . (join ' ', @ARGV); system "rm $BytecodeFile.inst"; system "llvm-prof $LLVMProfOpts $BytecodeFile $ProfileFile";