We currently force users to use a negative contant in the intrinsic
call. Changing it zext would break existing programs, so just sign
extend an argument.
Implement PhiLoweringHelper for GlobalISel in DivergenceLoweringHelper.
Use machine uniformity analysis to find divergent i1 phis and select
them as lane mask phis in same way SILowerI1Copies select VReg_1 phis.
Note that divergent i1 phis include phis created by LCSSA and all cases
of uses outside of cycle are actually covered by "lowering LCSSA phis".
GlobalISel lane masks are registers with sgpr register class and S1 LLT.
TODO: General goal is that instructions created in this pass are fully
instruction-selected so that selection of lane mask phis is not split
across multiple passes.
patch 3 from: https://github.com/llvm/llvm-project/pull/73337
Fix a potential hang introduced by #77439 and #77935. This line:
setScoreUB(VS_CNT, getScoreLB(VS_CNT) + getWaitCountMax(VS_CNT));
could potentialy set UB lower than it was before, which confused
SIInsertWaitcnts's fixed point algorithm.
This was only triggered a STORE instruction with an implicit-def, which
seems odd but apparently happens for some spills.
Similar to 806761a7629df268c8aed49657aeccffa6bca449.
For IR files without a target triple, -mtriple= specifies the full
target triple while -march= merely sets the architecture part of the
default target triple, leaving a target triple which may not make sense,
e.g. amdgpu-apple-darwin.
Therefore, -march= is error-prone and not recommended for tests without
a target triple. The issue has been benign as we recognize
$unknown-apple-darwin as ELF instead of rejecting it outrightly.
This patch changes AMDGPU tests to not rely on the default
OS/environment components. Tests that need fixes are not changed:
```
LLVM :: CodeGen/AMDGPU/fabs.f64.ll
LLVM :: CodeGen/AMDGPU/fabs.ll
LLVM :: CodeGen/AMDGPU/floor.ll
LLVM :: CodeGen/AMDGPU/fneg-fabs.f64.ll
LLVM :: CodeGen/AMDGPU/fneg-fabs.ll
LLVM :: CodeGen/AMDGPU/r600-infinite-loop-bug-while-reorganizing-vector.ll
LLVM :: CodeGen/AMDGPU/schedule-if-2.ll
```
We currently force users to use a negative contant in the intrinsic
call. Changing it zext would break existing programs, so just sign
extend an argument.
Moved extractParts() and extractVectorParts() from LegalizerHelper
to Utils to be able to use it in different passes.
extractParts() will also try to use unmerge when doing irregular
splits where possible, falling back to extract elements when not.
This change is to remove incompatible gws related functions
in order to make device-libs work correctly under -O0 for
gfx1200+
Co-authored-by: Changpeng Fang <changpeng.fang@amd.com>
In order to ensure the correctness of ptr addrspace(7) lowering, we need
a backwards-compatible way to flag buffer intrinsics as volatile that
can't be dropped (unlike metadata).
To acheive this in a backwards-compatible way, we use bit 31 of the
auxilliary immediates of buffer intrinsics as the volatile flag. When
this bit is set, the MachineMemOperand for said intrinsic is marked
volatile. Existing code will ensure that this results in the appropriate
use of flags like glc and dlc.
This commit also harmorizes the handling of the auxilliary immediate for
atomic intrinsics, which new go through extract_cpol like loads and
stores, which masks off the volatile bit.
Always set the upper bound for VS_CNT higher than the lower bound.
Before #77439 this code was only executed on function entry where the
lower bound was 0 so it was not a problem.
Fixes#77931
Force live interval recomputation for a register if its definition is
narrowed to become partial. The live interval repair process cannot
otherwise detect these changes.
Modify GCNHazardRecognizer::fixLdsDirectVMEMHazard() so the waitvsrc
operand
in gfx12 DS_PARAM_LOAD or DS_DIRECT_LOAD instructions is set
appropriately
depending on whether a hazard is found or not, rather than inserting an
S_WAITCNT_DEPCTR instruction if a hazard needs to be mitigated.
Co-authored-by: Stephen Thomas <Stephen.Thomas@amd.com>
We previously had a heuristic that if a value V was used multiple times
in a single PHI, then to avoid potentially rematerializing into many predecessors
we bail out. The phi uses only counted as a single use in the shouldLocalize() hook
because it counted the PHI as a single instruction use, not factoring in it may
have many incoming edges.
It turns out this heuristic is slightly too pessimistic, and allowing a small number
of these uses to be localized can improve code size due to shortening live ranges,
especially if those ranges span a call.
This change results in some improvements in size on CTMark -Os:
```
Program size.__text
before after diff
kimwitu++/kc 451676.00 451860.00 0.0%
mafft/pairlocalalign 241460.00 241540.00 0.0%
tramp3d-v4/tramp3d-v4 389216.00 389208.00 -0.0%
7zip/7zip-benchmark 587528.00 587464.00 -0.0%
Bullet/bullet 457424.00 457348.00 -0.0%
consumer-typeset/consumer-typeset 405472.00 405376.00 -0.0%
SPASS/SPASS 410288.00 410120.00 -0.0%
lencod/lencod 426396.00 426108.00 -0.1%
ClamAV/clamscan 380108.00 379756.00 -0.1%
sqlite3/sqlite3 283664.00 283372.00 -0.1%
Geomean difference -0.0%
```
I experimented with different variations and thresholds. Using 3 instead
of 2 resulted in a further 0.1% improvement on ClamAV but also regressed
sqlite3 by the same %.
Calls do not have to wait for VsCnt, so after they return there might
still be scratch stores in progress. It's important that we don't send
the DEALLOC_VGPR message in that case, since that might release the
VGPRs and scratch allocation before those stores are complete.
As not all fake instructions have their real counterparts implemented
yet, we specify no AssemblerPredicate for UseFakeTrue16Insts to allow
both fake and real True16 instructions in assembler and disassembler
tests in the -mattr=+real-true16 mode during the transition period.
Source DPP and desitnation VOPDstOperand_t16 operands are still not
supported and will be addressed separately.
This is in preparation for moving the run of AMDGPUAttributor earlier.
Currently it infers the lack of the corresponding intrinsic calls,
so if we introduce new ones we need to remove the attribute from any
possible transitive callers. This is more conservative than necessary,
we could try to identify specific subgraphs where LDS globals are not
used.
Other options include teaching the attributor to avoid adding it in
cases
where the lowering may choose the table, but this seems more complex.
Alternatively could add a second run which doesn't seem worth it.
Depends #71349
The library implementation is just a wrapper around a call to the
intrinsic, but loses metadata. Swap out the call site to the intrinsic
so that the lowering can see the !fpmath metadata and fast math flags.
Since d56e0d07cc5ee8e334fd1ad403eef0b1a771384f, clang started placing
!fpmath on OpenCL library sqrt calls. Also don't bother emitting
native_sqrt anymore, it's just another wrapper around llvm.sqrt.
Port CodeGenPrepare to new pass manager and dependency
BasicBlockSectionsProfileReader
Fixes: #75380
Co-authored-by: Krishna-13-cyber <84722531+Krishna-13-cyber@users.noreply.github.com>
Revert e0c554ad87d18dcbfcb9b6485d0da800ae1338d1 "Port CodeGenPrepare to new pass manager (and BasicBlockSectionsProfil… (#75380)"
Revert #75380 and #77054 as they were breaking EXPENSIVE_CHECKS buildbots: https://lab.llvm.org/buildbot/#/builders/104
Port CodeGenPrepare to new pass manager and dependency
BasicBlockSectionsProfileReader
Fixes: #64560
Co-authored-by: Krishna-13-cyber <84722531+Krishna-13-cyber@users.noreply.github.com>
Needs an AMDGPU hack to get the selection to work. The ordinary
variant is custom lowered through an almost equivalent target node
that would need a strict variant for additional known bits
optimizations.
There are some intrinsics are using i16 vectors in place of bfloat
vectors.
Move towards making bf16 vectors legal so these can migrate. Leave the
larger vectors for a later change.
Depends #76213#76214
"hidden_dynamic_lds_size" argument will be added in the reserved section
at offset 120 of the implicit argument layout.
Add "isDynamicLDSUsed" flag to AMDGPUMachineFunction to identify if a
function uses dynamic LDS.
hidden argument will be added in below cases:
- LDS global is used in the kernel.
- Kernel calls a function which uses LDS global.
- LDS pointer is passed as argument to kernel itself.
