Allow a BlockFrequency to be divided by a non-zero BranchProbability
with saturating arithmetic. This will be used to compute the frequency
of a loop header given the probability of leaving the loop.
Our long division algorithm already saturates on overflow, so that was a
freebie.
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There are a few valid situation where we care about the structure inside a
directory, but not about the directory itself. A simple example is for unit
testing directory traversal.
PathV1 had a function like this, add one to V2 and port existing users of the
created temp file and delete it hack to using it.
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Zero is used by BlockFrequencyInfo as a special "don't know" value. It also
causes a sink for frequencies as you can't ever get off a zero frequency with
more multiplies.
This recovers a 10% regression on MultiSource/Benchmarks/7zip. A zero frequency
was propagated into an inner loop causing excessive spilling.
PR16402.
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It was only used to implement ExecuteAndWait and ExecuteNoWait. Expose just
those two functions and make Execute and Wait implementations details.
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Most clients have already been moved from Path V1 to V2. The ones using V1
now include PathV1.h explicitly.
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Add a stringize method to make dumping a bit easier, and add a testcase
exercising a few different paths.
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That seems to interact poorly with the environ and _environ macros
defined in MSVC's <stdlib.h>.
Also remove the incorrect comment about _NSGetEnviron().
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This was r180041 and r180046, which was reverted in r180066.
Re-committing this should fix the dragonegg bootstrap, which I presume
needs LD_LIBRARY_PATH to be propagated to the child.
Tested on Linux, Windows, and Mac OS 10.6.
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Summary:
This is http://llvm.org/PR15802. Backslashes preceding double quotes in
arguments must be escaped. The interesting bit is that all other
backslashes should *not* be escaped, because the un-escaping logic is
only triggered by the presence of a double quote character.
Reviewers: Bigcheese
CC: llvm-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D705
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This reverts commit a33e1fafac7fedb1b080ef07ddf9ad6ddff3a830.
This unit test crashes on Darwon. It needs to be temporarily reverted
to unblock the test infrastructure.
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I got blamed on darwin11;
unittests/Support/ManagedStatic.cpp:35: error: 'pthread_attr_setstack' was not declared in this scope
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ErrorOr<void> represents an operation that returns nothing, but can still fail.
It should be used in cases where you need the aditional user data that ErrorOr
provides over error_code.
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