all tests accordingly.

Fixes PR13351.

Patch by shinichiro hamaji!

llvm-svn: 160899

llvm-svn: 160898

llvm-svn: 160897

into predecessor blocks to enable tail call optimization.

rdar://11958338

llvm-svn: 160894

A value number is a PHI def if and only if it begins at a block
boundary. This can be derived from the def slot, a separate flag is not
necessary.

llvm-svn: 160893

This option replaces the existing live interval computation with one
based on LiveRangeCalc.cpp. The new algorithm does not depend on
LiveVariables, and it can be run at any time, before or after leaving
SSA form.

llvm-svn: 160892

llvm-svn: 160889

Patch by Tyler Nowicki!

llvm-svn: 160888

Also add assertions to validate the iterator in the insert method overloads.

llvm-svn: 160882

llvm-svn: 160881

llvm-svn: 160880

llvm-svn: 160876

This can happen as long as the instruction is not reachable. Instcombine does generate these unreachable malformed selects when doing RAUW

llvm-svn: 160874

llvm-svn: 160873

Move some functions from MCRegisterInfo.h that don't need to be inline.

This shrinks llc by 8K.

llvm-svn: 160865

The rationale here is that it's hard to write loops containing vector erases and
it only shows up if the vector contains non-trivial objects leading to crashes
when forming them out of garbage memory.

llvm-svn: 160854

llvm-svn: 160852

These tables were indexed by [register][subreg index] which made them,
very large and sparse.

Replace them with lists of sub-register indexes that match the existing
lists of sub-registers. MCRI::getSubReg() becomes a very short linear
search, like getSubRegIndex() already was.

llvm-svn: 160843

Now that the weird X86 sub_ss and sub_sd sub-register indexes are gone,
there is no longer a need for the CompositeIndices construct in .td
files. Sub-register index composition can be specified on the
SubRegIndex itself using the ComposedOf field.

Also enforce unique names for sub-registers in TableGen. The same
sub-register cannot be available with multiple sub-register indexes.

llvm-svn: 160842

replace uses of function getMaxCallFrameSize defined in MipsFunctionInfo with
the one MachineFrameInfo has.

llvm-svn: 160841

llvm-svn: 160835

llvm-svn: 160833

I'll remove these two sub-register indexes shortly.

llvm-svn: 160831

The (COPY_TO_REGCLASS GR32:$src, VR128) pattern looks odd, but
copyPhysReg does the right thing with it. (The old pattern would
eventually produce the same cross-class copy).

llvm-svn: 160830

llvm-svn: 160823

This gets rid of some more INSERT_SUBREG - IMPLICIT_DEF patterns,
simplifying the emitted code a bit.

llvm-svn: 160820

The SUBREG_TO_REG instruction has magic semantics asserting that the
source value was defined by an instruction that cleared the high half of
the register. Those semantics are never actually exploited for xmm
registers.

llvm-svn: 160818

These idempotent sub-register indices don't do anything --- They simply
map XMM registers to themselves.  They no longer affect register classes
either since the SubRegClasses field has been removed from Target.td.

This patch replaces XMM->XMM EXTRACT_SUBREG and INSERT_SUBREG patterns
with COPY_TO_REGCLASS patterns which simply become COPY instructions.

The number of IMPLICIT_DEF instructions before register allocation is
reduced, and that is the cause of the test case changes.

llvm-svn: 160816

Add support for v16i32/v16i64 into the code generator. This is required for backends that use i32/i64 vectors for the getSetCCResultType function.

llvm-svn: 160814

Function names should be camel case, and start with a lower case letter.  No
functional change intended.

llvm-svn: 160813

llvm-svn: 160798

This is still a work in progress.

Out-of-order CPUs usually execute instructions from multiple basic
blocks simultaneously, so it is necessary to look at longer traces when
estimating the performance effects of code transformations.

The MachineTraceMetrics analysis will pick a typical trace through a
given basic block and provide performance metrics for the trace. Metrics
will include:

- Instruction count through the trace.
- Issue count per functional unit.
- Critical path length, and per-instruction 'slack'.

These metrics can be used to determine the performance limiting factor
when executing the trace, and how it will be affected by a code
transformation.

Initially, this will be used by the early if-conversion pass.

llvm-svn: 160796

llvm-svn: 160791

Thanks Eli for noticing.

llvm-svn: 160787

is a temporary measure until my fix for PR13021 is ready.

llvm-svn: 160778

llvm-svn: 160777

hopefully make it more visible.  Adjust the web-docs to have a link to
this file rather than the list itself.  I described code owners as also
being gatekeepers for their part of the code, which I think is true but
isn't in the code owner explanation on the web page.

llvm-svn: 160776

llvm-svn: 160775

Patch by Reed Kotler.

llvm-svn: 160774

llvm-svn: 160762