This silences several analyzer warnings within LLVM, and provides a slightly
nicer crash experience when someone calls isa<>, cast<>, or dyn_cast<> with
a null pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164439 91177308-0d34-0410-b5e6-96231b3b80d8
This silences literally dozens of analyzer warnings on LLVM (since DenseMap
is such a commonly-used class).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164438 91177308-0d34-0410-b5e6-96231b3b80d8
whether or not we want to print out backtrace information. Useful
for libraries that don't need backtrace information on a crash.
rdar://11844710
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164426 91177308-0d34-0410-b5e6-96231b3b80d8
The expression based expansion too often results in IR level optimizations
splitting the intermediate values into separate basic blocks, preventing
the formation of the VBSL instruction as the code author intended. In
particular, LICM would often hoist part of the computation out of a loop.
rdar://11011471
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164340 91177308-0d34-0410-b5e6-96231b3b80d8
Make the TargetPrefix setting one big setting instead of being spread out
everywhere. No functional change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164265 91177308-0d34-0410-b5e6-96231b3b80d8
This fixes some obscure failure cases involving registers defined inside multiclasses or foreach constructs that would not receive a unique ID, and would end up being omitted from the AsmMatcher tables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164251 91177308-0d34-0410-b5e6-96231b3b80d8
to improve compatibility with GNU as.
Based on a patch by PaX Team.
Fixed assertion failures on non-Darwin and added additional test cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164248 91177308-0d34-0410-b5e6-96231b3b80d8
provide insertion order iteration, instead of the old option of
DenseMap order iteration over keys and insertion order iteration over
values.
This is implemented by keeping two copies of each key.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164221 91177308-0d34-0410-b5e6-96231b3b80d8
This is a generally useful utility; there's no reason to have it hidden
in CodeGenDAGPatterns.cpp.
Also, rename it to fit the other comparators in Record.h
Review by Jakob.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164189 91177308-0d34-0410-b5e6-96231b3b80d8
store this and use it to not emit long nops when the CPU is geode which
doesnt support them.
Fixes PR11212.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164132 91177308-0d34-0410-b5e6-96231b3b80d8
Now where we used to call ReInitMCSubtargetInfo, we actually recompute
the same information as InitMCSubtargetInfo instead of only setting
the feature bits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164105 91177308-0d34-0410-b5e6-96231b3b80d8
Add LIS::pruneValue() and extendToIndices(). These two functions are
used by the register coalescer when merging two live ranges requires
more than a trivial value mapping as supported by LiveInterval::join().
The pruneValue() function can remove the part of a value number that is
going to conflict in join(). Afterwards, extendToIndices can restore the
live range, using any new dominating value numbers and updating the SSA
form.
Use this complex value mapping to support merging a register into a
vector lane that has a conflicting value, but the clobbered lane is
undef.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164074 91177308-0d34-0410-b5e6-96231b3b80d8
