[ARM] Remove superfluous inline asm mode switch test

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200361 91177308-0d34-0410-b5e6-96231b3b80d8
[AArch64 NEON] Lower SELECT_CC with vector operand.

When the scalar compare is between floating point and operands are
vector, we custom lower SELECT_CC to use NEON SIMD compare for
generating less instructions.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200365 91177308-0d34-0410-b5e6-96231b3b80d8
Use a raw_stream to implement the mangler.

This is a bit more convenient for some callers, but more importantly, it is
easier to implement correctly. Doing this removes the patching of already
printed data that was used for fastcall, fixing a crash with private fastcall
symbols.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200367 91177308-0d34-0410-b5e6-96231b3b80d8
[SparcV9] Use correct register class (I64RegClass) to hold the address of  _GLOBAL_OFFSET_TABLE_ in sparcv9.


git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200368 91177308-0d34-0410-b5e6-96231b3b80d8
We do use pipefail these days. Update the test.

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LoopVectorizer: Don't count the induction variable multiple times

When estimating register pressure, don't count the induction variable mulitple
times. It is unlikely to be unrolled. This is currently disabled and hidden
behind a flag ("enable-ind-var-reg-heur").

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[LPM] Fix PR18642, a pretty nasty bug in IndVars that "never mattered"
because of the inside-out run of LoopSimplify in the LoopPassManager and
the fact that LoopSimplify couldn't be "preserved" across two
independent LoopPassManagers.

Anyways, in that case, IndVars wasn't correctly preserving an LCSSA PHI
node because it thought it was rewriting (via SCEV) the incoming value
to a loop invariant value. While it may well be invariant for the
current loop, it may be rewritten in terms of an enclosing loop's
values. This in and of itself is fine, as the LCSSA PHI node in the
enclosing loop for the inner loop value we're rewriting will have its
own LCSSA PHI node if used outside of the enclosing loop. With me so
far?

Well, the current loop and the enclosing loop may share an exiting
block and exit block, and when they do they also share LCSSA PHI nodes.
In this case, its not valid to RAUW through the LCSSA PHI node.

Expected crazy test included.

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[Sparc] Use %r_disp32 for pc_rel entries in gcc_except_table and eh_frame.

Otherwise, assembler (gas) fails to assemble them with error message "operation
combines symbols in different segments". This is because MC computes
pc_rel entries with subtract expression between labels from different sections.


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Normalize the style in llvm-nm.cpp.

It had grown fairly inconsistent. I am about to change it quite a bit to also
use the object api when handling IR files.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200374 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r200340, "Add line table debug info to COFF files when using a win32 triple."

It was incompatible with --target=i686-win32.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200375 91177308-0d34-0410-b5e6-96231b3b80d8
[Sparc] Use %r_disp32 for pc_rel entries in FDE as well.

This makes MCAsmInfo::getExprForFDESymbol() a virtual function and overrides it in SparcMCAsmInfo.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200376 91177308-0d34-0410-b5e6-96231b3b80d8
Delete the Matchers stored in the SmallVectors in SwitchOpcodeMatcher/SwitchTypeMatcher.

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[asan] simplify a test 

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200378 91177308-0d34-0410-b5e6-96231b3b80d8
MC: Reorganize macro MC test along dialect lines

This commit seeks to do two things:
 - Run the surfeit of tests under the Darwin dialect.  This ends up
   affecting tests which assumed that spaces could deliminate arguments.
 - The GAS dialect tests should limit their surface area to things that
   could plausibly work under GAS. For example, Darwin style arguments
   have no business being in such a test.


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Enable EHABI by default

After all hard work to implement the EHABI and with the test-suite
passing, it's time to turn it on by default and allow users to
disable it as a work-around while we fix the eventual bugs that show
up.

This commit also remove the -arm-enable-ehabi-descriptors, since we
want the tables to be printed every time the EHABI is turned on
for non-Darwin ARM targets.

Although MCJIT EHABI is not working yet (needs linking with the right
libraries), this commit also fixes some relocations on MCJIT regarding
the EH tables/lib calls, and update some tests to avoid using EH tables
when none are needed.

The EH tests in the test-suite that were previously disabled on ARM
now pass with these changes, so a follow-up commit on the test-suite
will re-enable them.

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Document EHABI enabled by default

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Remove -arm-enable-ehabi from Android build rules. It's enabled by default.


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[LPM] Fix PR18643, another scary place where loop transforms failed to
preserve loop simplify of enclosing loops.

The problem here starts with LoopRotation which ends up cloning code out
of the latch into the new preheader it is buidling. This can create
a new edge from the preheader into the exit block of the loop which
breaks LoopSimplify form. The code tries to fix this by splitting the
critical edge between the latch and the exit block to get a new exit
block that only the latch dominates. This sadly isn't sufficient.

The exit block may be an exit block for multiple nested loops. When we
clone an edge from the latch of the inner loop to the new preheader
being built in the outer loop, we create an exiting edge from the outer
loop to this exit block. Despite breaking the LoopSimplify form for the
inner loop, this is fine for the outer loop. However, when we split the
edge from the inner loop to the exit block, we create a new block which
is in neither the inner nor outer loop as the new exit block. This is
a predecessor to the old exit block, and so the split itself takes the
outer loop out of LoopSimplify form. We need to split every edge
entering the exit block from inside a loop nested more deeply than the
exit block in order to preserve all of the loop simplify constraints.

Once we try to do that, a problem with splitting critical edges
surfaces. Previously, we tried a very brute force to update LoopSimplify
form by re-computing it for all exit blocks. We don't need to do this,
and doing this much will sometimes but not always overlap with the
LoopRotate bug fix. Instead, the code needs to specifically handle the
cases which can start to violate LoopSimplify -- they aren't that
common. We need to see if the destination of the split edge was a loop
exit block in simplified form for the loop of the source of the edge.
For this to be true, all the predecessors need to be in the exact same
loop as the source of the edge being split. If the dest block was
originally in this form, we have to split all of the deges back into
this loop to recover it. The old mechanism of doing this was
conservatively correct because at least *one* of the exiting blocks it
rewrote was the DestBB and so the DestBB's predecessors were fixed. But
this is a much more targeted way of doing it. Making it targeted is
important, because ballooning the set of edges touched prevents
LoopRotate from being able to split edges *it* needs to split to
preserve loop simplify in a coherent way -- the critical edge splitting
would sometimes find the other edges in need of splitting but not
others.

Many, *many* thanks for help from Nick reducing these test cases
mightily. And helping lots with the analysis here as this one was quite
tricky to track down.

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[mips][msa] CHECK-DAG-ize MSA elm_copy.ll test.

This update is a preparation for the addition of Mips64 MSA tests.

No functional changes.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@200395 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][msa] Add copy_{u,s}.d.

These instructions are only available on Mips64 cores
that implement the MSA ASE.



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