diff options
| -rw-r--r-- | doc/gimple.md | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/doc/gimple.md b/doc/gimple.md index f97e50c32cb..145c4eda3c1 100644 --- a/doc/gimple.md +++ b/doc/gimple.md @@ -36,7 +36,7 @@ int main() { // To set `-O3`, update it depending on your needs. gcc_jit_context_set_int_option(ctxt, GCC_JIT_INT_OPTION_OPTIMIZATION_LEVEL, 3); // Very important option to generate the gimple format. - gcc_jit_context_add_command_line_option(ctxt, "-fdump-tree-gimple"); + gcc_jit_context_set_bool_option(ctxt, GCC_JIT_BOOL_OPTION_DUMP_INITIAL_GIMPLE, 1); create_code(ctxt, NULL); gcc_jit_context_compile(ctxt); @@ -54,21 +54,13 @@ Then we can compile it by using: gcc local.c -I `pwd`/gcc/gcc/jit/ -L `pwd`/gcc-build/gcc -lgccjit -o out ``` -Before running it, I recommend running: - -```console -rm -rf /tmp/libgccjit-* -``` - -to make it easier for you to know which folder to look into. - And finally when you run it: ```console LD_LIBRARY_PATH=`pwd`/gcc-build/gcc LIBRARY_PATH=`pwd`/gcc-build/gcc ./out ``` -You should now have a file named with path looking like `/tmp/libgccjit-9OFqkD/fake.c.006t.gimple` which contains: +It should display: ```c __attribute__((const)) @@ -95,3 +87,25 @@ int xxx () return D.3394; } ``` + +An alternative way to generate the GIMPLE is to replace: + +```c + gcc_jit_context_set_bool_option(ctxt, GCC_JIT_BOOL_OPTION_DUMP_INITIAL_GIMPLE, 1); +``` + +with: + +```c + gcc_jit_context_add_command_line_option(ctxt, "-fdump-tree-gimple"); +``` + +(although you can have both at the same time too). Then you can compile it like previously. Only one difference: before executing it, I recommend to run: + +```console +rm -rf /tmp/libgccjit-* +``` + +to make it easier for you to know which folder to look into. + +Once the execution is done, you should now have a file with path looking like `/tmp/libgccjit-9OFqkD/fake.c.006t.gimple` which contains the GIMPLE format. |