The problem can occur in presence of subregs. If we are swapping two
instructions defining different subregs of the same register we will
get a new liveout from a block. We need to preserve value number for
block's liveout for successor block's livein to match.
Differential Revision: https://reviews.llvm.org/D30558
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297534 91177308-0d34-0410-b5e6-96231b3b80d8
Re-apply this patch, hopefully I will get away without any warnings
in the constructor now.
This patch removes the MachineFunctionAnalysis. Instead we keep a
map from IR Function to MachineFunction in the MachineModuleInfo.
This allows the insertion of ModulePasses into the codegen pipeline
without breaking it because the MachineFunctionAnalysis gets dropped
before a module pass.
Peak memory should stay unchanged without a ModulePass in the codegen
pipeline: Previously the MachineFunction was freed at the end of a codegen
function pipeline because the MachineFunctionAnalysis was dropped; With
this patch the MachineFunction is freed after the AsmPrinter has
finished.
Differential Revision: http://reviews.llvm.org/D23736
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279602 91177308-0d34-0410-b5e6-96231b3b80d8
Change this pass constructor to just accept a const TargetMachine * and
use INITIALIZE_TM_PASS, that way we can get rid of the dummy
constructor. The pass will still fail when calling the default
constructor leading to TM == nullptr, this is no different than before
but is more in line what other codegen passes are doing and avoids the
dummy constructor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279598 91177308-0d34-0410-b5e6-96231b3b80d8
dereferenced null pointer) in MachineModuleInfo::MachineModuleInfo that causes
-Werror builds (including several buildbots) to fail.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279580 91177308-0d34-0410-b5e6-96231b3b80d8
Re-apply this commit with the deletion of a MachineFunction delegated to
a separate pass to avoid use after free when doing this directly in
AsmPrinter.
This patch removes the MachineFunctionAnalysis. Instead we keep a
map from IR Function to MachineFunction in the MachineModuleInfo.
This allows the insertion of ModulePasses into the codegen pipeline
without breaking it because the MachineFunctionAnalysis gets dropped
before a module pass.
Peak memory should stay unchanged without a ModulePass in the codegen
pipeline: Previously the MachineFunction was freed at the end of a codegen
function pipeline because the MachineFunctionAnalysis was dropped; With
this patch the MachineFunction is freed after the AsmPrinter has
finished.
Differential Revision: http://reviews.llvm.org/D23736
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279564 91177308-0d34-0410-b5e6-96231b3b80d8
This patch removes the MachineFunctionAnalysis. Instead we keep a
map from IR Function to MachineFunction in the MachineModuleInfo.
This allows the insertion of ModulePasses into the codegen pipeline
without breaking it because the MachineFunctionAnalysis gets dropped
before a module pass.
Peak memory should stay unchanged without a ModulePass in the codegen
pipeline: Previously the MachineFunction was freed at the end of a codegen
function pipeline because the MachineFunctionAnalysis was dropped; With
this patch the MachineFunction is freed after the AsmPrinter has
finished.
Differential Revision: http://reviews.llvm.org/D23736
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279502 91177308-0d34-0410-b5e6-96231b3b80d8
Change the syntax to use `%0.sub8` to denote a subregister.
This seems like a more natural fit to denote subregisters; I also plan
to introduce a new ":classname" syntax in upcoming patches to denote the
register class of a vreg.
Note that this commit disallows plain identifiers to start with a '.'
character. This shouldn't affect anything as external names/IR
references are all prefixed with '$'/'%', plain identifiers are only
used for instruction names, register mask names and subreg indexes.
Differential Revision: https://reviews.llvm.org/D22390
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276815 91177308-0d34-0410-b5e6-96231b3b80d8
If we move a last-use register read to a later position we may skip
intermediate segments. This may require us to not only extend the
segment before the NewIdx, but also extend the segment live-in to
OldIdx.
This switches LiveIntervalTest to use AMDGPU so we can test subregister
liveness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276724 91177308-0d34-0410-b5e6-96231b3b80d8
undef uses are no real uses of a register and must be ignored by
findLastUseBefore() so that handleMove() does not produce invalid live
intervals in some cases.
This fixed http://llvm.org/PR28083
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272446 91177308-0d34-0410-b5e6-96231b3b80d8
Having an enum member named Default is quite confusing: Is it distinct
from the others?
This patch removes that member and instead uses Optional<Reloc> in
places where we have a user input that still hasn't been maped to the
default value, which is now clear has no be one of the remaining 3
options.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@269988 91177308-0d34-0410-b5e6-96231b3b80d8
Add convenience function to create MachineModuleInfo and
MachineFunctionAnalysis passes and add them to a pass manager.
Despite factoring out some shared code in
LiveIntervalTest/LLVMTargetMachine this will be used by my upcoming llc
change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@269002 91177308-0d34-0410-b5e6-96231b3b80d8
Fix handleMove() incorrectly extending liveranges when an undef input of
a vreg was moved past the (current) end of the liverange.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268805 91177308-0d34-0410-b5e6-96231b3b80d8
This re-applies r260905. It requires LiveIntervals to not require
LiveVariables which was reverted and re-applied in r267954.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268329 91177308-0d34-0410-b5e6-96231b3b80d8
Lit tends to find out-of-date unittests in the build tree.
FIXME: It may be reverted several days after.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261194 91177308-0d34-0410-b5e6-96231b3b80d8
The commit breaks stage2 compilation on PowerPC. Reverting for now while
this is analyzed. I also have to revert the LiveIntervalTest for now as
that depends on this commit.
Revert "LiveIntervalAnalysis: Remove LiveVariables requirement"
This reverts commit r260806.
Revert "Remove an unnecessary std::move to fix -Wpessimizing-move warning."
This reverts commit r260931.
Revert "Fix typo in LiveIntervalTest"
This reverts commit r260907.
Revert "Add unittest for LiveIntervalAnalysis::handleMove()"
This reverts commit r260905.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261189 91177308-0d34-0410-b5e6-96231b3b80d8
