f32 vectors would use a sequence of BFI instructions instead
of unrolled cmp + select. This was better in the case of a VALU
select with SGPR inputs, but we don't have a way of dealing with that
in the DAG.
llvm-svn: 270731
[AMDGPU] emitPrologue looks for an unused unallocated SGPR that is not
the scratch descriptor. Continue search if unused register found fails
other requirements.
Reviewers: arsenm, tstellarAMD, nhaehnle
Subscribers: arsenm, llvm-commits, kzhuravl
Differential Revision: http://reviews.llvm.org/D20526
llvm-svn: 270646
Summary:
Change process of parsing of optional operands. All optional operands use same parsing method - parseOptionalOperand().
No default values are added to OperandsVector.
Get rid of WORKAROUND_USE_DUMMY_OPERANDS_INSTEAD_MUTIPLE_DEFAULT_OPERANDS.
Reviewers: tstellarAMD, vpykhtin, artem.tamazov, nhaustov
Subscribers: arsenm, kzhuravl
Differential Revision: http://reviews.llvm.org/D20527
llvm-svn: 270556
Allocating larger register classes first should give better allocation
results (and more importantly for myself, make the lit tests more stable
with respect to scheduler changes).
Patch by Matthias Braun
llvm-svn: 270312
The current SGPR spilling test does not stress this
because it is using s_buffer_load instructions to
increase SGPR pressure and spill, but their output
operands have the same SReg_32_XM0 constraint. This fixes
an error when the SReg_32 output from most instructions
is spilled.
llvm-svn: 270301
Fixes for MUBUF_Atomic instructions to make operand list valid:
- For RTN insns, make a copy of $vdata_in operand as $vdata.
- Do not add operand for GLC, it is hardcoded and comes as a token.
Workaround to avoid adding multiple default optional operands.
Tests added.
Differential Revision: http://reviews.llvm.org/D20257
llvm-svn: 270049
Having an enum member named Default is quite confusing: Is it distinct
from the others?
This patch removes that member and instead uses Optional<Reloc> in
places where we have a user input that still hasn't been maped to the
default value, which is now clear has no be one of the remaining 3
options.
llvm-svn: 269988
Use signed division otherwise all back jumps fail the check
Fixes regression introduced in r269951
Differential Revision: http://reviews.llvm.org/D20380
llvm-svn: 269972
Use register class that does not include them when looking
for unallocated registers.
This is hit by the udiv v8i64 test in the opencl integer
conformance test, and takes a few seconds to compile in
a debug build so no test included.
llvm-svn: 269938
This was assuming it could use all memory before, which is
a bad decision because it restricts occupancy.
By default, only try to use enough space that could reduce
occupancy to 7, an arbitrarily chosen limit.
Based on the exist LDS usage, try to round up to the limit
in the current tier instead of further hurting occupancy.
This isn't ideal, because it doesn't accurately know how much
space is going to be used for alignment padding.
llvm-svn: 269708
- Insert one nop for each high level statement instead of two
- Do not insert nop before prologue
Differential Revision: http://reviews.llvm.org/D20215
llvm-svn: 269452
We only really need this to be true for SIFixSGPRCopies.
I'm not sure there's any way this could happen before that point.
Fixes a case where MachineCSE could introduce a cross block
scc use.
llvm-svn: 269391
- Where we were returning a node before, call ReplaceNode instead.
- Where we would return null to fall back to another selector, rename
the method to try* and return a bool for success.
- Where we were calling SelectNodeTo, just return afterwards.
Part of llvm.org/pr26808.
llvm-svn: 269349
The promote alloca pass would attempt to promote an alloca with
a select, icmp, or phi user, even though the other operand was
from a non-promotable source, producing a select on two different
pointer types.
Only do this if we know that both operands derive from the same
alloca. In the future we should be able to relax this to an alloca
which will also be promoted.
llvm-svn: 269265
Remove the ModuleLevelChanges argument, and the ability to create new
subprograms for cloned functions. The latter was added without review in
r203662, but it has no in-tree clients (all non-test callers pass false
for ModuleLevelChanges [1], so it isn't reachable outside of tests). It
also isn't clear that adding a duplicate subprogram to the compile unit is
always the right thing to do when cloning a function within a module. If
this functionality comes back it should be accompanied with a more concrete
use case.
Furthermore, all in-tree clients add the returned function to the module.
Since that's pretty much the only sensible thing you can do with the function,
just do that in CloneFunction.
[1] http://llvm-cs.pcc.me.uk/lib/Transforms/Utils/CloneFunction.cpp/rCloneFunction
Differential Revision: http://reviews.llvm.org/D18628
llvm-svn: 269110
Artem Tamazov