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| author | Xavier Leroy <xavier.leroy@college-de-france.fr> | 2020-02-18 16:57:17 +0100 |
|---|---|---|
| committer | Xavier Leroy <xavierleroy@users.noreply.github.com> | 2020-02-21 13:29:39 +0100 |
| commit | be0b1872bf2ad36df9b0c7a0ffa63b9e77fa769b (patch) | |
| tree | 0d54cce547d12567d7e9e9f2c4d650e5a1b94b39 /backend/Tailcall.v | |
| parent | a9eaf4897c825093aba2137ff76e56bfbf1e72d5 (diff) | |
| download | compcert-kvx-be0b1872bf2ad36df9b0c7a0ffa63b9e77fa769b.tar.gz compcert-kvx-be0b1872bf2ad36df9b0c7a0ffa63b9e77fa769b.zip | |
Refine the type of function results in AST.signature
Before it was "option typ". Now it is a proper inductive type
that can also express small integer types (8/16-bit unsigned/signed integers).
One benefit is that external functions get more precise types that
control better their return values. As a consequence,
the CompCert C type preservation property now holds unconditionally,
without extra typing hypotheses on external functions.
Diffstat (limited to 'backend/Tailcall.v')
| -rw-r--r-- | backend/Tailcall.v | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/backend/Tailcall.v b/backend/Tailcall.v index 939abeea..b7a62d74 100644 --- a/backend/Tailcall.v +++ b/backend/Tailcall.v @@ -82,7 +82,7 @@ Definition transf_instr (f: function) (pc: node) (instr: instruction) := | Icall sig ros args res s => if is_return niter f s res && tailcall_is_possible sig - && opt_typ_eq sig.(sig_res) f.(fn_sig).(sig_res) + && rettype_eq sig.(sig_res) f.(fn_sig).(sig_res) then Itailcall sig ros args else instr | _ => instr |