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| author | Xavier Leroy <xavier.leroy@inria.fr> | 2015-08-21 11:05:36 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavier.leroy@inria.fr> | 2015-08-21 11:05:36 +0200 |
| commit | 54f97d1988f623ba7422e13a504caeb5701ba93c (patch) | |
| tree | d8dea46837352979490f4ed4516f9649fef41b98 /backend/Tunnelingproof.v | |
| parent | b4846ffadfa3fbb73ffa7d9c43e5218adeece8da (diff) | |
| download | compcert-54f97d1988f623ba7422e13a504caeb5701ba93c.tar.gz compcert-54f97d1988f623ba7422e13a504caeb5701ba93c.zip | |
Refactoring of builtins and annotations in the back-end.
Before, the back-end languages had distinct instructions
- Iannot for annotations, taking structured expressions (annot_arg)
as arguments, and producing no results'
- Ibuiltin for other builtins, using simple pseudoregs/locations/registers
as arguments and results.
This branch enriches Ibuiltin instructions so that they take structured
expressions (builtin_arg and builtin_res) as arguments and results.
This way,
- Annotations fit the general pattern of builtin functions,
so Iannot instructions are removed.
- EF_vload_global and EF_vstore_global become useless, as the
same optimization can be achieved by EF_vload/vstore taking
a structured argument of the "address of global" kind.
- Better code can be generated for builtin_memcpy between stack locations,
or volatile accesses to stack locations.
Finally, this commit also introduces a new kind of external function,
EF_debug, which is like EF_annot but produces no observable events.
It will be used later to transport debug info through the back-end,
without preventing optimizations.
Diffstat (limited to 'backend/Tunnelingproof.v')
| -rw-r--r-- | backend/Tunnelingproof.v | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/backend/Tunnelingproof.v b/backend/Tunnelingproof.v index 52318ede..e9e4856e 100644 --- a/backend/Tunnelingproof.v +++ b/backend/Tunnelingproof.v @@ -339,14 +339,8 @@ Proof. (* Lbuiltin *) left; simpl; econstructor; split. eapply exec_Lbuiltin; eauto. - eapply external_call_symbols_preserved'; eauto. - exact symbols_preserved. exact public_preserved. exact varinfo_preserved. - econstructor; eauto. - (* Lannot *) - left; simpl; econstructor; split. - eapply exec_Lannot; eauto. - eapply eval_annot_args_preserved with (ge1 := ge); eauto. exact symbols_preserved. - eapply external_call_symbols_preserved; eauto. + eapply eval_builtin_args_preserved with (ge1 := ge); eauto. exact symbols_preserved. + eapply external_call_symbols_preserved. eauto. exact symbols_preserved. exact public_preserved. exact varinfo_preserved. econstructor; eauto. |