The old system was fairly convoluted:
* A temporary label was created.
* A single PROLOG_LABEL was created with it.
* A few MCCFIInstructions were created with the same label.
The semantics were that the cfi instructions were mapped to the PROLOG_LABEL
via the temporary label. The output position was that of the PROLOG_LABEL.
The temporary label itself was used only for doing the mapping.
The new CFI_INSTRUCTION has a 1:1 mapping to MCCFIInstructions and points to
one by holding an index into the CFI instructions of this function.
I did consider removing MMI.getFrameInstructions completelly and having
CFI_INSTRUCTION own a MCCFIInstruction, but MCCFIInstructions have non
trivial constructors and destructors and are somewhat big, so the this setup
is probably better.
The net result is that we don't create temporary labels that are never used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203204 91177308-0d34-0410-b5e6-96231b3b80d8
That was overly aggressive in assuming that we could always assume COFF. Some
of the tests assume that they will get ELF rather than COFF even on Windows
where the default is COFF.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203176 91177308-0d34-0410-b5e6-96231b3b80d8
This is a preliminary setup change to support a renaming of Windows target
triples. Split the object file format information out of the environment into a
separate entity. Unfortunately, file format was previously treated as an
environment with an unknown OS. This is most obvious in the ARM subtarget where
the handling for macho on an arbitrary platform switches to AAPCS rather than
APCS (as per Apple's needs).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203160 91177308-0d34-0410-b5e6-96231b3b80d8
Windows always uses COFF unless Windows ELF is in use. Rather than checking if
Windows, MinGW, or Cygwin is being targeted, just check if the target OS is
windows and that it is not an ELF environment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203159 91177308-0d34-0410-b5e6-96231b3b80d8
This patch teaches the DAGCombiner how to fold a binary OR between two
shufflevector into a single shuffle vector when possible.
The rules are:
1. fold (or (shuf A, V_0, MA), (shuf B, V_0, MB)) -> (shuf A, B, Mask1)
2. fold (or (shuf A, V_0, MA), (shuf B, V_0, MB)) -> (shuf B, A, Mask2)
The DAGCombiner can take advantage of the fact that OR is commutative and
compute two possible shuffle masks (Mask1 and Mask2) for the resulting
shuffle node.
Before folding a dag according to either rule 1 or 2, DAGCombiner verifies
that the resulting shuffle mask is legal for the target.
DAGCombiner would firstly try to fold according to 1.; If not possible
then it will try to fold according to 2.
If both Mask1 and Mask2 are illegal then we conservatively don't fold
the OR instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203156 91177308-0d34-0410-b5e6-96231b3b80d8
This reverts commits r203136, r203137, and r203138.
This code doesn't build on Windows. Even on Vista+, Windows requires
elevated privileges to create a symlink. Therefore we can't use
symlinks in the compiler. We'll have to find another approach.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203143 91177308-0d34-0410-b5e6-96231b3b80d8
There was a race where:
- The LockFileManager tries to own the lock file and fails.
- The other owner then releases and removes the lock file.
- The LockFileManager tries to read the owner info from the lock file but fails now.
In such a case have LockFileManager try to get ownership again, instead of error'ing out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203138 91177308-0d34-0410-b5e6-96231b3b80d8
Hard links do not work on SMB network directories, and it causes us to fail
to build clang module files if the module cache is in such a directory.
rdar://15944959
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203137 91177308-0d34-0410-b5e6-96231b3b80d8
for the Cortex-A53 subtarget in the AArch64 backend.
This patch lays the ground work to annotate each AArch64 instruction
(no NEON yet) with a list of SchedReadWrite types. The patch also
provides the Cortex-A53 processor resources, maps those the the default
SchedReadWrites, and provides basic latency. NEON support will be added
in a subsequent patch with proper forwarding logic.
Verification was done by setting the pre-RA scheduler to linearize to
better gauge the effect of the MIScheduler. Even without modeling the
forward logic, the results show a modest improvement for Cortex-A53.
Reviewers: apazos, mcrosier, atrick
Patch by Dave Estes <cestes@codeaurora.org>!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203125 91177308-0d34-0410-b5e6-96231b3b80d8
Just the simple cases for now. There were a few knock-on changes of
MachineBasicBlock *s to MachineBasicBlock &s. No functional change intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203105 91177308-0d34-0410-b5e6-96231b3b80d8
This compiles with no changes to clang/lld/lldb with MSVC and includes
overloads to various functions which are used by those projects and llvm
which have OwningPtr's as parameters. This should allow out of tree
projects some time to move. There are also no changes to libs/Target,
which should help out of tree targets have time to move, if necessary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203083 91177308-0d34-0410-b5e6-96231b3b80d8
This is consistent with GDB ToT and reduces the number of relocations in
(type and compile) units, substantially reducing relocations and debug
size in fission + type units builds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203082 91177308-0d34-0410-b5e6-96231b3b80d8
