purpose. Fixes PR9080!

llvm-svn: 124903

If interference reaches the last split point, it is effectively live out and
should be marked as 'MustSpill'.

This can make a difference when the terminator uses a register. There is no way
that register can be reused in the outgoing CFG bundle, even if it isn't live
out.

llvm-svn: 124900

5 to match the current doc.
Added FIXME reminder Make it really configurable later.

llvm-svn: 124899

Teach ARM/MC/ELF to handle R_ARM_JUMP24 relocation type for conditional jumps.
(yes, this is different from R_ARM_CALL)

- Adds a new method getARMBranchTargetOpValue() which handles the
  necessary distinction between the conditional and unconditional br/bl
  needed for ARM/ELF

At least for ARM mode, the needed fixup for conditional versus unconditional
br/bl is identical, but the ARM docs and existing ARM tools expect this
reloc type...

Added a few FIXME's for future naming fixups in ARMInstrInfo.td

llvm-svn: 124895

A live range cannot be split everywhere in a basic block. A split must go before
the first terminator, and if the variable is live into a landing pad, the split
must happen before the call that can throw.

llvm-svn: 124894

We should not be attempting a region split if it won't lead to at least one
directly allocatable interval. That could cause infinite splitting loops.

llvm-svn: 124893

custom conversion functions).

llvm-svn: 124872

by Clang.

llvm-svn: 124871

llvm-svn: 124870

Silence uninitialized value warnings.

llvm-svn: 124869

[AVX] Support VSINSERTF128 with more patterns and appropriate
infrastructure.  This makes lowering 256-bit vectors to 128-bit
vectors simple when 256-bit vector support is not available.

llvm-svn: 124868

llvm-svn: 124864

llvm-svn: 124857

llvm-svn: 124854

precisely track pressure on a selection DAG, but we can at least keep
it balanced. This design accounts for various interesting aspects of
selection DAGS: register and subregister copies, glued nodes, dead
nodes, unused registers, etc.

Added SUnit::NumRegDefsLeft and ScheduleDAGSDNodes::RegDefIter.

Note: I disabled PrescheduleNodesWithMultipleUses when register
pressure is enabled, based on no evidence other than I don't think it
makes sense to have both enabled.

llvm-svn: 124853

DebugLoc associated with a machine instruction is used to emit location entries. DebugLoc associated with a DBG_VALUE is used to identify lexical scope of the variable. After register allocation, while inserting DBG_VALUE remember original debug location for the first instruction and reuse it, otherwise dwarf writer may be mislead in identifying the variable's scope.

llvm-svn: 124845

llvm-svn: 124843

llvm-svn: 124842

When the live range is live through a block that doesn't use the register, but
that has interference, region splitting wants to split at the top and bottom of
the basic block.

llvm-svn: 124839

Allow a live range to end with a kill flag, but don't allow a kill flag that
doesn't end the live range.

This makes the machine code verifier more useful during register allocation when
kill flag computation is deferred.

llvm-svn: 124838

llvm-svn: 124832

llvm-svn: 124831

llvm-svn: 124830

llvm-svn: 124829

llvm-svn: 124827

SimplifyCFG: Also transform switches that represent a range comparison but are not sorted into sub+icmp.

This transforms another 1000 switches in gcc.c.

llvm-svn: 124826

macros.

llvm-svn: 124824

them on install. Before we would have LLVMgold.so on the build directory but
libLLVMgold.so on the install dir.

llvm-svn: 124821

llvm-svn: 124819

library.

Installs tblgen (required by Clang).

Translates handling of user settings and platform-dependant options to
its own file, where it can included by another project.

Installs the .cmake files required by projects like Clang.

llvm-svn: 124816

llvm-svn: 124815

llvm-svn: 124814

llvm-svn: 124813

If the found value is not live-through the block, we should only add liveness up
to the requested slot index. When the value is live-through, the whole block
should be colored.

Bug found by SSA verification in the machine code verifier.

llvm-svn: 124812

These end points come from the inserted copies, and can be passed directly to
useIntv. This simplifies the coloring code.

llvm-svn: 124799

llvm-svn: 124798

[AVX] VEXTRACTF128 support.  This commit includes patterns for
matching EXTRACT_SUBVECTOR to VEXTRACTF128 along with support routines
to examine and translate index values.  VINSERTF128 comes next.  With
these two in place we can begin supporting more AVX operations as
INSERT/EXTRACT can be used as a fallback when 256-bit support is not
available.

llvm-svn: 124797

llvm-svn: 124794

llvm-svn: 124793

auto-simplifier).  This has a big impact on Ada code, but not much else.
Unfortunately the impact is mostly negative!  This is due to PR9004 (aka
SCCP failing to resolve conditional branch conditions in the destination
blocks of the branch), in which simple correlated expressions are not
resolved but complicated ones are, so simplifying has a bad effect!

llvm-svn: 124788