Enhancement to InstCombine. Try to catch this opportunity:
---------------------------------------------------------------
((X^C1) >> C2) ^ C3 => (X>>C2) ^ ((C1>>C2)^C3)
where the subexpression "X ^ C1" has more than one uses, and
"(X^C1) >> C2" has single use.
----------------------------------------------------------------
Reviewed by Nadav (with minor change per his request).
llvm-svn: 168615
- use lldb settings command instead of os.environ
- use dyldPath fixture variable instead of hardcoding LD_LIBRARY_PATH
- add tear-down hook to restore environment after testcase is run
llvm-svn: 168613
- use lldb 'settings' command to help testcase find shared library
- pull up dyldPath variable from TestLoadUnload.py to fixture base class (applicable in multiple cases)
llvm-svn: 168612
-ansi or -std=c++03, the long long type is not supported. So in this
case, several functions and types, like lldiv_t, strtoll(), are not
declared.
llvm-svn: 168610
Before, SATestBuild unilaterally added '-j<n>' to every project built with
'make'. Now, we check and see if there's a -j option already specified, which
allows a project to explicitly be marked '-j1'.
llvm-svn: 168603
The AllocaRegion did not have the superRegion (based on LocationContext)
as part of it's hash. As a consequence, the AllocaRegions from
different frames were uniqued to be the same region.
llvm-svn: 168599
In preparation for the FileCheck functionality change which will allow using
a variable later on the same line.
No functionality change.
llvm-svn: 168588
initialization, don't rebuild it. Remove a couple of hacks which were trying to
work around this. Fix the special case for one-argument CXXConstructExprs to
not apply if the one argument is a default argument.
llvm-svn: 168582
The bug can be triggered when we require LoopInfo analysis ahead of DominatorTree construction in a Module Pass. The cause is that the LoopInfo analysis itself also invokes DominatorTree construction, therefore, when PassManager schedules LoopInfo, it will add DominatorTree first. Then after that, when the PassManger turns to schedule DominatorTree invoked by the above ModulePass, it finds there is already a DominatorTree, so it delete the redundant one. However, somehow it still try to access that pass pointer after free as code pasted below, which results in segment fault.
llvm-svn: 168581
Adding CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
This is to handle the wackiness on a Mac host where cmake detects:
CMAKE_CXX_COMPILER == "/usr/bin/c++"
CMAKE_C_COMPILER == "/usr/bin/gcc"
llvm-svn: 168577
- Widespread trailing space removal
- A dash of OCD spacing to block align enums
- joined a line that probably needed 80 cols a while back
llvm-svn: 168566
to support it. Original patch with the parsing and plumbing by the PaX team and
Roman Divacky. I added the bits in MCDwarf.cpp and the test.
llvm-svn: 168565
Bill Wendling