Switch from using a LoopPass to using a FunctionPass for the internal helper analysis pass. The next step is going to be to make this a true analysis pass which is required by the PlaceSafepoints pass itself.
p.s. The interesting semantic part here is that we're changing the iteration order over the loops. It shouldn't matter, but that's the reason to separate this into it's own distinct patch.
Differential Revision: http://reviews.llvm.org/D9588
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237180 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This rule was always in the old SysV i386 ABI docs and the new ones that
H.J. Lu has put together, but we never noticed:
EAX scratch register; also used to return integer and pointer values
from functions; also stores the address of a returned struct or union
Fixes PR23491.
Reviewers: majnemer
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D9715
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237175 91177308-0d34-0410-b5e6-96231b3b80d8
As a step towards getting rid of internal pass manager hack entirely, remove the need for loop simplify to run in the inner pass manager. The new code does produce slightly different loop structures, so this isn't technically NFC.
Differential Revision: http://reviews.llvm.org/D9585
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237172 91177308-0d34-0410-b5e6-96231b3b80d8
We already had a method to iterate over all the incoming values of a PHI. This just changes all eligible code to use it.
Ineligible code included anything which cared about the index, or was also trying to get the i'th incoming BB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237169 91177308-0d34-0410-b5e6-96231b3b80d8
AMDGPU::SI_SPILL_V96_RESTORE was missing from a switch statement, which
caused the srsrc and soffset register to not be set correctly.
This commit replaces the switch statement with a SITargetInfo query
to make sure all spill instructions are covered.
Differential Revision: http://reviews.llvm.org/D9582
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237164 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This patch reimplements heuristic that tries to estimate optimization beneftis
from complete loop unrolling.
In this patch I kept the minimal changes - e.g. I removed code handling
branches and folding compares. That's a promising area, but now there
are too many questions to discuss before we can enable it.
Test Plan: Tests are included in the patch.
Reviewers: hfinkel, chandlerc
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D8816
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237156 91177308-0d34-0410-b5e6-96231b3b80d8
On Mips, frame pointer points to the same side of the frame as the stack
pointer. This function is used to decide where to put register scavenging
spill slot. So far, it was put on the wrong side of the frame, and thus it
was too far away from $fp when frame was larger than 2^15 bytes.
Patch by Vladimir Radosavljevic.
http://reviews.llvm.org/D8895
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237153 91177308-0d34-0410-b5e6-96231b3b80d8
Spilling can insert instructions almost anywhere, and this can mess
up control flow lowering in a multitude of ways, due to instruction
reordering. Let's sort this out the easy way: never spill registers
involved with control flow, i.e. saved EXEC masks.
Unfortunately, this does not work at all with optimizations disabled,
as the register allocator ignores spill weights. This should be
addressed in a future commit.
The test was reduced from the "stacks" shader of [1]. Some issues
trigger the machine verifier while another one is checked manually.
[1] http://madebyevan.com/webgl-path-tracing/
v2: only insert pass with optimizations enabled, merge test runs.
Patch by: Grigori Goronzy
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237152 91177308-0d34-0410-b5e6-96231b3b80d8
The DWARF-4 specification added 2 new fields in the CIE header called
address_size and segment_size.
Create these 2 new fields when generating dwarf-4 CIE entries, print out
the new fields when dumping the CIE and update tests
Differential Revision: http://reviews.llvm.org/D9558
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237145 91177308-0d34-0410-b5e6-96231b3b80d8
We had code to do this in SIRegisterInfo::eliminateFrameIndex(), but
it is easier to just change the definition of SI_SPILL_S32_RESTORE to
only allow numbered sgprs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237143 91177308-0d34-0410-b5e6-96231b3b80d8
Instead add m0 as an implicit operand. This allows us to avoid using
the M0Reg register class and eliminates a number of unnecessary spills
when using s_sendmsg instructions. This impacts one shader in the
shader-db:
SGPRS: 48 -> 40 (-16.67 %)
VGPRS: 112 -> 108 (-3.57 %)
Code Size: 40132 -> 38796 (-3.33 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Scratch: 2048 -> 0 (-100.00 %) bytes per wave
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237133 91177308-0d34-0410-b5e6-96231b3b80d8
TRI->getRegClass() takes a register class ID, not a register. We were
using this incorrectly in a few places.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237132 91177308-0d34-0410-b5e6-96231b3b80d8
The other changes in the LowerShift() are not functional,
just to make the code more convenient.
So, the functional changes for SKX only.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237129 91177308-0d34-0410-b5e6-96231b3b80d8
AEABI defines aligned variants of memcpy etc. that can be faster than
the default version due to not having to do alignment checks. When
emitting target code for these functions make use of these aligned
variants if possible. Also convert memset to memclr if possible.
Differential Revision: http://reviews.llvm.org/D8060
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237127 91177308-0d34-0410-b5e6-96231b3b80d8
According to the documentation in StackMap section for the safepoint we should have:
"The first Location in each pair describes the base pointer for the object. The second is the derived pointer actually being relocated."
But before this change we emitted them in reverse order - derived pointer first, base pointer second.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237126 91177308-0d34-0410-b5e6-96231b3b80d8
Before revision 171146, function 'PerformTruncateCombine' used to perform
a premature lowering of TRUNCATE dag nodes.
Revision 171146 then moved all the logic implemented by PerformTruncateCombine
to a custom lowering hook. However, that revision forgot to delete
function PerformTruncateCombine from the code.
This patch removes function 'PerformTruncateCombine' since it has no effect
on the SelectionDAG. No functional change intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237122 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Allow calls with non legal integer types based on i8 and i16 to be processed by mips fast-isel.
Based on a patch by Reed Kotler.
Test Plan:
"Make check" test forthcoming.
Test-suite passes at O0/O2 and with mips32 r1/r2
Reviewers: rkotler, dsanders
Subscribers: llvm-commits, rfuhler
Differential Revision: http://reviews.llvm.org/D6770
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237121 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Try to compute addresses when the offset from a memory location is a constant
expression.
Based on a patch by Reed Kotler.
Test Plan:
Passes test-suite for -O0/O2 and mips 32 r1/r2
Reviewers: rkotler, dsanders
Subscribers: llvm-commits, aemerson, rfuhler
Differential Revision: http://reviews.llvm.org/D6767
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237117 91177308-0d34-0410-b5e6-96231b3b80d8
like: select i1 %cond, <16 x i1> %a, <16 x i1> %b.
I added pseudo-CMOV patterns to resolve the "select".
Added tests for KNL and SKX.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237106 91177308-0d34-0410-b5e6-96231b3b80d8
to use the information in the module rather than TargetOptions.
We've had and clang has used the use-soft-float attribute for some
time now so have the backends set a subtarget feature based on
a particular function now that subtargets are created based on
functions and function attributes.
For the one middle end soft float check go ahead and create
an overloadable TargetLowering::useSoftFloat function that
just checks the TargetSubtargetInfo in all cases.
Also remove the command line option that hard codes whether or
not soft-float is set by using the attribute for all of the
target specific test cases - for the generic just go ahead and
add the attribute in the one case that showed up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237079 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The original code inserted new instructions by following a
Create->Remove->ReInsert flow. This patch removes the unnecessary
Remove->ReInsert part by setting up the InsertPoint correctly at the
very beginning. This change does not introduce any functionality change.
Patch by Chen Li!
Reviewers: reames, AndyAyers, sanjoy
Reviewed By: sanjoy
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D9687
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237070 91177308-0d34-0410-b5e6-96231b3b80d8
