Merge of branch new-semantics: revised and strengthened top-level statements of semantic preservation.

git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1683 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e

1 files changed, 8 insertions, 0 deletions

diff --git a/Changelog b/Changelog
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+- Revised and strengthened the top-level statements of semantic preservation.
+  In particular, we now show:
+  . backward simulation for the whole compiler without assuming
+    a deterministic external world;
+  . if the source program goes wrong after performing some I/O,
+    the compiled code performs at least these I/O before continuing
+    with an arbitrary behavior.
+
 - Revised handling of annotation statements.  Now they come in two forms:
     1. __builtin_annot("format", x1, ..., xN)
        (arbitrarily many arguments; no code generated, even if some