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When optimizing boolean expressions, it is not always possible
to find a number of live registers for a GC BIF that both preserves
all source registers that will be tested and at the same time
does not include registers that are not initialized.
As currently implemented, we have incomplete information about
the register calculated from the free variables. Some registers
are marked as "reserved". Reserved registers means that we don't
know anything about them; they may or may not be initialized.
As a conservative correction (suitable for a maintenance release), we
will abort the optimization if we find any reserved registers when
calculating the number of live registers. We will not attempt to
improve the information about the registers in this commit.
By examining the coverage when running the existing compiler test
suite we find that the optimization is aborted 15 times (before
adding any new test cases). To put that in perspective, the
optimization is successfully applied 4927 times, and aborted for
other reasons 547 times.
Reported-by: Ulf Norell
Reported-by: Anthony Ramine
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Old versions of the Erlang mode for Emacs used to indent try...catch
strangely - the first clause following the 'catch' would be indented
with one space less than the following clauses.
If we are to use the new Erlang mode when we add more clauses, they
would be indented with one space less than the preceding clauses.
That would look silly.
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* tombenner/doc_fixes:
Fix grammar and formatting issues
Fix typo ("to use to use")
Add a comma after "For example" when appropriate
Use colons before <code> when appropriate
Move periods inside parenthetical sentences
Add an apostrophe to contractions of "let us"
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* derek121/mnesia-doc-fixes:
Fix grammar
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* mikpe/fix-eacces-spelling:
fix eacces spelling
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* hans/eldap/bad_return_close/OTP-12349:
eldap: Remove trailing white space.
eldap: Test cases for a few return values (open, close)
eldap: updated eldap:close in tests
eldap: Makes close/1 return as documented.
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* hans/eldap/test_improvents/OTP-12355:
eldap: Corrects SSL over IPv6 test.
eldap: Removes eldap_misc_SUITE that is now included in eldap_basic_SUITE.
eldap: Add encode/decode tests.
eldap: Merge eldap_connections_SUITE into eldab_basic_SUITE
eldap: Adds ssl to connections test suite
eldap: Updates basic test suite - Splits one large testcase into smaller ones. - Makes tests independent - Adds some tests.
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* haguenau/fix-endianness-speling:
Replaced "Endianess" with "Endianness" everywhere
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- Splits one large testcase into smaller ones.
- Makes tests independent
- Adds some tests.
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* ia/ssh/ssh-connection-protocol-timeout/OTP-12004:
ssh: Improve errorhandling in ssh_connection.erl
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If a channel is closed by the peer while using a function with call semantics
in ssh_connection.erl return {error, closed}. Document that the functions
can return {error, timeout | closed} and not only ssh_request_status()
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* marcus/revert-ssh-testcase2/OTP-12004:
fix failed conflict resolution
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* marcus/fix-eldap-notes:
add missing release notes
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* rickard/atomic64/OTP-12351:
Use the new 64-bit atomic ops API
Introduce a 64-bit atomic ops API
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The 64-bit atomic ops API is implemented by
* native word size atomic ops on 64-bit architectures, and
* native double word size atomic ops on 32-bit architectures
when available. When native double word size atomic is not
available, the fallback using modification counters is
used.
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* hans/ssh/fix_app_appup:
ssh: Fix syntax error in .appup
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* marcus/revert-ssh-testcase/OTP-12004:
revert ssh testcase
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* dgud/debugger/still-invoked-gs-functions/OTP-12357:
debugger: Do not use the old removed gs functionality
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* hans/ssh/fix_app_appup:
ssh: Fix .app and .appup
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* rickard/appup-files/OTP-12358:
Add .appup file
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