294 lines
8.2 KiB
Groff
294 lines
8.2 KiB
Groff
.\" $FreeBSD$
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.\" Man page generated from reStructuredText.
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.
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.TH "BUGPOINT" "1" "2015-05-30" "3.7" "LLVM"
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.SH NAME
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bugpoint \- automatic test case reduction tool
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..
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.SH SYNOPSIS
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.sp
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\fBbugpoint\fP [\fIoptions\fP] [\fIinput LLVM ll/bc files\fP] [\fILLVM passes\fP] \fB\-\-args\fP
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\fIprogram arguments\fP
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.SH DESCRIPTION
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.sp
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\fBbugpoint\fP narrows down the source of problems in LLVM tools and passes. It
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can be used to debug three types of failures: optimizer crashes, miscompilations
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by optimizers, or bad native code generation (including problems in the static
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and JIT compilers). It aims to reduce large test cases to small, useful ones.
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For more information on the design and inner workings of \fBbugpoint\fP, as well as
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advice for using bugpoint, see \fIllvm/docs/Bugpoint.html\fP in the LLVM
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distribution.
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.SH OPTIONS
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.sp
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\fB\-\-additional\-so\fP \fIlibrary\fP
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.INDENT 0.0
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.INDENT 3.5
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Load the dynamic shared object \fIlibrary\fP into the test program whenever it is
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run. This is useful if you are debugging programs which depend on non\-LLVM
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libraries (such as the X or curses libraries) to run.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-append\-exit\-code\fP=\fI{true,false}\fP
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.INDENT 0.0
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.INDENT 3.5
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Append the test programs exit code to the output file so that a change in exit
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code is considered a test failure. Defaults to false.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-args\fP \fIprogram args\fP
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.INDENT 0.0
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.INDENT 3.5
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Pass all arguments specified after \fB\-\-args\fP to the test program whenever it runs.
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Note that if any of the \fIprogram args\fP start with a "\fB\-\fP", you should use:
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.INDENT 0.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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bugpoint [bugpoint args] \-\-args \-\- [program args]
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.sp
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The "\fB\-\-\fP" right after the \fB\-\-args\fP option tells \fBbugpoint\fP to consider
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any options starting with "\fB\-\fP" to be part of the \fB\-\-args\fP option, not as
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options to \fBbugpoint\fP itself.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-tool\-args\fP \fItool args\fP
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.INDENT 0.0
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.INDENT 3.5
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Pass all arguments specified after \fB\-\-tool\-args\fP to the LLVM tool under test
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(\fBllc\fP, \fBlli\fP, etc.) whenever it runs. You should use this option in the
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following way:
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.INDENT 0.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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bugpoint [bugpoint args] \-\-tool\-args \-\- [tool args]
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.sp
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The "\fB\-\-\fP" right after the \fB\-\-tool\-args\fP option tells \fBbugpoint\fP to
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consider any options starting with "\fB\-\fP" to be part of the \fB\-\-tool\-args\fP
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option, not as options to \fBbugpoint\fP itself. (See \fB\-\-args\fP, above.)
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-safe\-tool\-args\fP \fItool args\fP
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.INDENT 0.0
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.INDENT 3.5
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Pass all arguments specified after \fB\-\-safe\-tool\-args\fP to the "safe" execution
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tool.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-gcc\-tool\-args\fP \fIgcc tool args\fP
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.INDENT 0.0
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.INDENT 3.5
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Pass all arguments specified after \fB\-\-gcc\-tool\-args\fP to the invocation of
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\fBgcc\fP\&.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-opt\-args\fP \fIopt args\fP
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.INDENT 0.0
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.INDENT 3.5
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Pass all arguments specified after \fB\-\-opt\-args\fP to the invocation of \fBopt\fP\&.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-disable\-{dce,simplifycfg}\fP
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.INDENT 0.0
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.INDENT 3.5
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Do not run the specified passes to clean up and reduce the size of the test
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program. By default, \fBbugpoint\fP uses these passes internally when attempting to
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reduce test programs. If you\(aqre trying to find a bug in one of these passes,
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\fBbugpoint\fP may crash.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-enable\-valgrind\fP
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.INDENT 0.0
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.INDENT 3.5
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Use valgrind to find faults in the optimization phase. This will allow
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bugpoint to find otherwise asymptomatic problems caused by memory
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mis\-management.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-find\-bugs\fP
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.INDENT 0.0
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.INDENT 3.5
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Continually randomize the specified passes and run them on the test program
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until a bug is found or the user kills \fBbugpoint\fP\&.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-help\fP
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.INDENT 0.0
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.INDENT 3.5
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Print a summary of command line options.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-input\fP \fIfilename\fP
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.INDENT 0.0
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.INDENT 3.5
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Open \fIfilename\fP and redirect the standard input of the test program, whenever
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it runs, to come from that file.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-load\fP \fIplugin\fP
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.INDENT 0.0
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.INDENT 3.5
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Load the dynamic object \fIplugin\fP into \fBbugpoint\fP itself. This object should
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register new optimization passes. Once loaded, the object will add new command
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line options to enable various optimizations. To see the new complete list of
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optimizations, use the \fB\-help\fP and \fB\-\-load\fP options together; for example:
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.INDENT 0.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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bugpoint \-\-load myNewPass.so \-help
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-mlimit\fP \fImegabytes\fP
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.INDENT 0.0
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.INDENT 3.5
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Specifies an upper limit on memory usage of the optimization and codegen. Set
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to zero to disable the limit.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-output\fP \fIfilename\fP
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.INDENT 0.0
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.INDENT 3.5
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Whenever the test program produces output on its standard output stream, it
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should match the contents of \fIfilename\fP (the "reference output"). If you
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do not use this option, \fBbugpoint\fP will attempt to generate a reference output
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by compiling the program with the "safe" backend and running it.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-run\-{int,jit,llc,custom}\fP
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.INDENT 0.0
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.INDENT 3.5
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Whenever the test program is compiled, \fBbugpoint\fP should generate code for it
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using the specified code generator. These options allow you to choose the
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interpreter, the JIT compiler, the static native code compiler, or a
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custom command (see \fB\-\-exec\-command\fP) respectively.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-safe\-{llc,custom}\fP
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.INDENT 0.0
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.INDENT 3.5
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When debugging a code generator, \fBbugpoint\fP should use the specified code
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generator as the "safe" code generator. This is a known\-good code generator
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used to generate the "reference output" if it has not been provided, and to
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compile portions of the program that as they are excluded from the testcase.
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These options allow you to choose the
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static native code compiler, or a custom command, (see \fB\-\-exec\-command\fP)
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respectively. The interpreter and the JIT backends cannot currently
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be used as the "safe" backends.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-exec\-command\fP \fIcommand\fP
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.INDENT 0.0
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.INDENT 3.5
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This option defines the command to use with the \fB\-\-run\-custom\fP and
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\fB\-\-safe\-custom\fP options to execute the bitcode testcase. This can
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be useful for cross\-compilation.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-compile\-command\fP \fIcommand\fP
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.INDENT 0.0
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.INDENT 3.5
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This option defines the command to use with the \fB\-\-compile\-custom\fP
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option to compile the bitcode testcase. This can be useful for
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testing compiler output without running any link or execute stages. To
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generate a reduced unit test, you may add CHECK directives to the
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testcase and pass the name of an executable compile\-command script in this form:
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.INDENT 0.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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#!/bin/sh
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llc "$@"
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not FileCheck [bugpoint input file].ll < bugpoint\-test\-program.s
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.sp
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This script will "fail" as long as FileCheck passes. So the result
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will be the minimum bitcode that passes FileCheck.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-safe\-path\fP \fIpath\fP
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.INDENT 0.0
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.INDENT 3.5
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This option defines the path to the command to execute with the
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\fB\-\-safe\-{int,jit,llc,custom}\fP
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option.
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.UNINDENT
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.UNINDENT
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.SH EXIT STATUS
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.sp
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If \fBbugpoint\fP succeeds in finding a problem, it will exit with 0. Otherwise,
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if an error occurs, it will exit with a non\-zero value.
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.SH SEE ALSO
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.sp
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opt|opt
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.SH AUTHOR
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Maintained by The LLVM Team (http://llvm.org/).
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.SH COPYRIGHT
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2003-2014, LLVM Project
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.\" Generated by docutils manpage writer.
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