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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 /cfrontend/Cshmgen.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 'cfrontend/Cshmgen.v')
| -rw-r--r-- | cfrontend/Cshmgen.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/cfrontend/Cshmgen.v b/cfrontend/Cshmgen.v index 792a73f9..ee135dcd 100644 --- a/cfrontend/Cshmgen.v +++ b/cfrontend/Cshmgen.v @@ -602,7 +602,7 @@ Fixpoint transl_statement (ce: composite_env) (tyret: type) (nbrk ncnt: nat) do tb <- transl_expr ce b; do tcl <- transl_arglist ce cl args; OK(Scall x {| sig_args := typlist_of_arglist cl args; - sig_res := opttyp_of_type res; + sig_res := rettype_of_type res; sig_cc := cconv |} tb tcl) | _ => Error(msg "Cshmgen.transl_stmt(call)") @@ -667,7 +667,7 @@ Definition transl_var (ce: composite_env) (v: ident * type) := Definition signature_of_function (f: Clight.function) := {| sig_args := map typ_of_type (map snd (Clight.fn_params f)); - sig_res := opttyp_of_type (Clight.fn_return f); + sig_res := rettype_of_type (Clight.fn_return f); sig_cc := Clight.fn_callconv f |}. Definition transl_function (ce: composite_env) (f: Clight.function) : res function := |