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comparison docs/CommandGuide/opt.rst @ 83:60c9769439b8 LLVM3.7

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LLVM 3.7
author Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
date Wed, 18 Feb 2015 14:55:36 +0900
parents 54457678186b
children 1172e4bd9c6f
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78:af83660cff7b 83:60c9769439b8
60 :program:`opt` provides the ability to run any of LLVM's optimization or 60 :program:`opt` provides the ability to run any of LLVM's optimization or
61 analysis passes in any order. The :option:`-help` option lists all the passes 61 analysis passes in any order. The :option:`-help` option lists all the passes
62 available. The order in which the options occur on the command line are the 62 available. The order in which the options occur on the command line are the
63 order in which they are executed (within pass constraints). 63 order in which they are executed (within pass constraints).
64 64
65 .. option:: -std-compile-opts
66
67 This is short hand for a standard list of *compile time optimization* passes.
68 It might be useful for other front end compilers as well. To discover the
69 full set of options available, use the following command:
70
71 .. code-block:: sh
72
73 llvm-as < /dev/null | opt -std-compile-opts -disable-output -debug-pass=Arguments
74
75 .. option:: -disable-inlining 65 .. option:: -disable-inlining
76 66
77 This option is only meaningful when :option:`-std-compile-opts` is given. It 67 This option simply removes the inlining pass from the standard list.
78 simply removes the inlining pass from the standard list.
79 68
80 .. option:: -disable-opt 69 .. option:: -disable-opt
81 70
82 This option is only meaningful when :option:`-std-compile-opts` is given. It 71 This option is only meaningful when :option:`-std-link-opts` is given. It
83 disables most, but not all, of the :option:`-std-compile-opts`. The ones that 72 disables most passes.
84 remain are :option:`-verify`, :option:`-lower-setjmp`, and
85 :option:`-funcresolve`.
86 73
87 .. option:: -strip-debug 74 .. option:: -strip-debug
88 75
89 This option causes opt to strip debug information from the module before 76 This option causes opt to strip debug information from the module before
90 applying other optimizations. It is essentially the same as :option:`-strip` 77 applying other optimizations. It is essentially the same as :option:`-strip`
93 .. option:: -verify-each 80 .. option:: -verify-each
94 81
95 This option causes opt to add a verify pass after every pass otherwise 82 This option causes opt to add a verify pass after every pass otherwise
96 specified on the command line (including :option:`-verify`). This is useful 83 specified on the command line (including :option:`-verify`). This is useful
97 for cases where it is suspected that a pass is creating an invalid module but 84 for cases where it is suspected that a pass is creating an invalid module but
98 it is not clear which pass is doing it. The combination of 85 it is not clear which pass is doing it.
99 :option:`-std-compile-opts` and :option:`-verify-each` can quickly track down
100 this kind of problem.
101 86
102 .. option:: -stats 87 .. option:: -stats
103 88
104 Print statistics. 89 Print statistics.
105 90