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Diffstat (limited to 'usr.bin/clang/llvm-diff/llvm-diff.1')
| -rw-r--r-- | usr.bin/clang/llvm-diff/llvm-diff.1 | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/usr.bin/clang/llvm-diff/llvm-diff.1 b/usr.bin/clang/llvm-diff/llvm-diff.1 new file mode 100644 index 0000000..21586ef --- /dev/null +++ b/usr.bin/clang/llvm-diff/llvm-diff.1 @@ -0,0 +1,77 @@ +.\" $FreeBSD$ +.TH "LLVM-DIFF" "1" "2012-08-16" "3.2" "LLVM" +.SH NAME +llvm-diff \- LLVM structural 'diff' +. +.nr rst2man-indent-level 0 +. +.de1 rstReportMargin +\\$1 \\n[an-margin] +level \\n[rst2man-indent-level] +level margin: \\n[rst2man-indent\\n[rst2man-indent-level]] +- +\\n[rst2man-indent0] +\\n[rst2man-indent1] +\\n[rst2man-indent2] +.. +.de1 INDENT +.\" .rstReportMargin pre: +. RS \\$1 +. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin] +. nr rst2man-indent-level +1 +.\" .rstReportMargin post: +.. +.de UNINDENT +. RE +.\" indent \\n[an-margin] +.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]] +.nr rst2man-indent-level -1 +.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]] +.in \\n[rst2man-indent\\n[rst2man-indent-level]]u +.. +.\" Man page generated from reStructuredText. +. +.SH SYNOPSIS +.sp +\fBllvm\-diff\fP [\fIoptions\fP] \fImodule 1\fP \fImodule 2\fP [\fIglobal name ...\fP] +.SH DESCRIPTION +.sp +\fBllvm\-diff\fP compares the structure of two LLVM modules, primarily +focusing on differences in function definitions. Insignificant +differences, such as changes in the ordering of globals or in the +names of local values, are ignored. +.sp +An input module will be interpreted as an assembly file if its name +ends in \(aq.ll\(aq; otherwise it will be read in as a bitcode file. +.sp +If a list of global names is given, just the values with those names +are compared; otherwise, all global values are compared, and +diagnostics are produced for globals which only appear in one module +or the other. +.sp +\fBllvm\-diff\fP compares two functions by comparing their basic blocks, +beginning with the entry blocks. If the terminators seem to match, +then the corresponding successors are compared; otherwise they are +ignored. This algorithm is very sensitive to changes in control flow, +which tend to stop any downstream changes from being detected. +.sp +\fBllvm\-diff\fP is intended as a debugging tool for writers of LLVM +passes and frontends. It does not have a stable output format. +.SH EXIT STATUS +.sp +If \fBllvm\-diff\fP finds no differences between the modules, it will exit +with 0 and produce no output. Otherwise it will exit with a non\-zero +value. +.SH BUGS +.sp +Many important differences, like changes in linkage or function +attributes, are not diagnosed. +.sp +Changes in memory behavior (for example, coalescing loads) can cause +massive detected differences in blocks. +.SH AUTHOR +Maintained by The LLVM Team (http://llvm.org/). +.SH COPYRIGHT +2012, LLVM Project +.\" Generated by docutils manpage writer. +. |
