we're proposing it for DWARF5.

No functional change intended.

llvm-svn: 190074

llvm-svn: 190064

Fast register pressure tracking currently only takes effect during
bottom up scheduling. Forcing this is a bit faster and simpler for
targets that don't have many scheduling constraints and don't need
top-down scheduling.

llvm-svn: 190014

without a limiting factor.

Update all testcases accordingly.

llvm-svn: 190002

Needs testcase updates.

llvm-svn: 190000

llvm-svn: 189999

llvm-svn: 189997

llvm-svn: 189995

llvm-svn: 189994

llvm-svn: 189993

llvm-svn: 189992

If the instruction window is < NumRegs/2, pressure tracking is not
likely to be effective. The scheduler has to process a very large
number of tiny blocks. We want this to be fast.

llvm-svn: 189991

llvm-svn: 189990

llvm-svn: 189989

llvm-svn: 189988

Register pressure tracking is half the complexity of the
scheduler. It's useful to be able to turn it off for compile time and
performance comparisons.

llvm-svn: 189987

llvm-svn: 189977

Revert "Revert "Remove the darwin gdb option, that version of gdb is now dead and the rest of the compatibility should be done on a dwarf-N level.""

This reverts commit r189913.

Talked with Eric on IRC. I am going to XFAIL the failing test since it
is using what Eric described as "the member hack" which was needed on
that old GDB.

Sorry for the noise!

llvm-svn: 189914

Revert "Remove the darwin gdb option, that version of gdb is now dead and the rest of the compatibility should be done on a dwarf-N level."

This reverts commit r189903.

This commit broke the phase 1 buildbot for a while.

http://lab.llvm.org:8013/builders/clang-x86_64-darwin11-nobootstrap-RAincremental/builds/6684

llvm-svn: 189913

the rest of the compatibility should be done on a dwarf-N level.

llvm-svn: 189903

in the module. Add a FIXME with a comment about darwin's ld.

llvm-svn: 189902

hashing the contents of DW_FORM_data1 on top of a type with attributes.

llvm-svn: 189862

llvm-svn: 189861

This won't affect the kinds of hashes we test for as we actually
do hashing based on form and attribute. Change the fission-hash
testcase one last time to handle DW_AT_comp_dir.

llvm-svn: 189840

There was one case that we could hit a DebugValue where I didn't think
to check. DebugValues are evil. No checkinable test case, sorry. It's
an obvious fix.

llvm-svn: 189717

Remove redundant or bug-prone LiveInterval APIs.

llvm-svn: 189685

This removes all expensive pressure tracking logic from the scheduling
critical path of node comparison.

llvm-svn: 189643

Return true for LRGs that end at EarlyClobber or Register slots.

llvm-svn: 189642

Only compare pressure within the same set. When multiple sets are
affected, we prioritize the most constrained set.

llvm-svn: 189641

Created SUPressureDiffs array to hold the per node PDiff computed during DAG building.

Added a getUpwardPressureDelta API that will soon replace the old
one. Compute PressureDelta here from the precomputed PressureDiffs.

Updating for liveness will come next.

llvm-svn: 189640

llvm-svn: 189635

any maintained consumers of it on that platform.

llvm-svn: 189631

llvm-svn: 189630

This should be much more clear now. It's still disabled pending testing.

llvm-svn: 189597

Revert unintentional commit (of an unreviewed change).

Original commit message:

Add getUnrollingPreferences to TTI

Allow targets to customize the default behavior of the generic loop unrolling
transformation. This will be used by the PowerPC backend when targeting the A2
core (which is in-order with a deep pipeline), and using more aggressive
defaults is important.

llvm-svn: 189566

Allow targets to customize the default behavior of the generic loop unrolling
transformation. This will be used by the PowerPC backend when targeting the A2
core (which is in-order with a deep pipeline), and using more aggressive
defaults is important.

llvm-svn: 189565

This uses the TargetSubtargetInfo::useAA() function to control the defaults of
the -combiner-alias-analysis and -combiner-global-alias-analysis options.

llvm-svn: 189564

There are several optional (off-by-default) features in CodeGen that can make
use of alias analysis. These features are important for generating code for
some kinds of cores (for example the (in-order) PPC A2 core). This adds a
useAA() function to TargetSubtargetInfo to allow these features to be enabled
by default on a per-subtarget basis.

Here is the first use of this function: To control the default of the
-enable-aa-sched-mi feature.

llvm-svn: 189563

llvm-svn: 189526

in use supports it.

llvm-svn: 189439