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| -rw-r--r-- | README.md | 16 | ||||
| -rw-r--r-- | src/binaryen-shell.cpp | 4 |
2 files changed, 20 insertions, 0 deletions
@@ -38,6 +38,22 @@ Run bin/binaryen-shell [.wast file] [options] [passes, see --help] [--help] ```` +The binaryen shell receives a .wast file as input, and can run transformation passes on it, as well as print it (before and/or after the transformations). For example, try + +```` +bin/binaryen-shell test/if_else.wast -print-before +```` + +That will pretty-print out one of the testcases in the test suite. To run a transformation pass on it, try + +```` +bin/binaryen-shell test/if_else.wast -print-before -print-after -lower-if-else +```` + +The `lower-if-else` pass lowers if-else into a block and a break. You can see the difference the transformation between the print before versus after. + +Some more notes: + * See `bin/binaryen-shell --help` for the full list of options and passes. * Setting `BINARYEN_DEBUG=1` in the env will emit some debugging info. diff --git a/src/binaryen-shell.cpp b/src/binaryen-shell.cpp index c7357e141..3ec9e684b 100644 --- a/src/binaryen-shell.cpp +++ b/src/binaryen-shell.cpp @@ -240,7 +240,9 @@ int main(int argc, char **argv) { auto instance = new ModuleInstance(wasm, interface); if (print_before) { + Colors::bold(std::cout); std::cout << "printing before:\n"; + Colors::normal(std::cout); std::cout << wasm; } @@ -256,7 +258,9 @@ int main(int argc, char **argv) { } if (print_after) { + Colors::bold(std::cout); std::cout << "printing after:\n"; + Colors::normal(std::cout); std::cout << wasm; } |