[AMDGPU][gfx1250] Support "cluster" syncscope #157641
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This was referenced Sep 9, 2025
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@llvm/pr-subscribers-backend-amdgpu Author: Pierre van Houtryve (Pierre-vh) ChangesDefaults to "agent" for targets that do not support it.
Patch is 4.07 MiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/157641.diff 10 Files Affected:
diff --git a/llvm/docs/AMDGPUUsage.rst b/llvm/docs/AMDGPUUsage.rst
index 2cddc3365d5d7..c7d515aeb012f 100644
--- a/llvm/docs/AMDGPUUsage.rst
+++ b/llvm/docs/AMDGPUUsage.rst
@@ -537,6 +537,8 @@ Every processor supports every OS ABI (see :ref:`amdgpu-os`) with the following
- Packed
work-item Add product
IDs names.
+ - Workgroup
+ Clusters
=========== =============== ============ ===== ================= =============== =============== ======================
@@ -1095,6 +1097,22 @@ is conservatively correct for OpenCL.
- ``wavefront`` and executed by a thread in the
same wavefront.
+ ``cluster`` Synchronizes with, and participates in modification
+ and seq_cst total orderings with, other operations
+ (except image operations) for all address spaces
+ (except private, or generic that accesses private)
+ provided the other operation's sync scope is:
+
+ - ``system``, ``agent`` or ``cluster`` and
+ executed by a thread on the same cluster.
+ - ``workgroup`` and executed by a thread in the
+ same work-group.
+ - ``wavefront`` and executed by a thread in the
+ same wavefront.
+
+ On targets that do not support workgroup cluster
+ launch mode, this behaves like ``agent`` scope instead.
+
``workgroup`` Synchronizes with, and participates in modification
and seq_cst total orderings with, other operations
(except image operations) for all address spaces
@@ -1128,6 +1146,9 @@ is conservatively correct for OpenCL.
``agent-one-as`` Same as ``agent`` but only synchronizes with other
operations within the same address space.
+ ``cluster-one-as`` Same as ``cluster`` but only synchronizes with other
+ operations within the same address space.
+
``workgroup-one-as`` Same as ``workgroup`` but only synchronizes with
other operations within the same address space.
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.cpp
index eda479064d7b2..d09b7cffe9f29 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.cpp
@@ -23,6 +23,7 @@ AMDGPUMachineModuleInfo::AMDGPUMachineModuleInfo(const MachineModuleInfo &MMI)
AgentSSID = CTX.getOrInsertSyncScopeID("agent");
WorkgroupSSID = CTX.getOrInsertSyncScopeID("workgroup");
WavefrontSSID = CTX.getOrInsertSyncScopeID("wavefront");
+ ClusterSSID = CTX.getOrInsertSyncScopeID("cluster");
SystemOneAddressSpaceSSID =
CTX.getOrInsertSyncScopeID("one-as");
AgentOneAddressSpaceSSID =
@@ -33,4 +34,5 @@ AMDGPUMachineModuleInfo::AMDGPUMachineModuleInfo(const MachineModuleInfo &MMI)
CTX.getOrInsertSyncScopeID("wavefront-one-as");
SingleThreadOneAddressSpaceSSID =
CTX.getOrInsertSyncScopeID("singlethread-one-as");
+ ClusterOneAddressSpaceSSID = CTX.getOrInsertSyncScopeID("cluster-one-as");
}
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.h b/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.h
index fcb0c8cfb7ca6..bf852bb38376e 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUMachineModuleInfo.h
@@ -32,6 +32,8 @@ class AMDGPUMachineModuleInfo final : public MachineModuleInfoELF {
SyncScope::ID WorkgroupSSID;
/// Wavefront synchronization scope ID (cross address space).
SyncScope::ID WavefrontSSID;
+ /// Cluster synchronization scope ID (cross address space).
+ SyncScope::ID ClusterSSID;
/// System synchronization scope ID (single address space).
SyncScope::ID SystemOneAddressSpaceSSID;
/// Agent synchronization scope ID (single address space).
@@ -42,6 +44,8 @@ class AMDGPUMachineModuleInfo final : public MachineModuleInfoELF {
SyncScope::ID WavefrontOneAddressSpaceSSID;
/// Single thread synchronization scope ID (single address space).
SyncScope::ID SingleThreadOneAddressSpaceSSID;
+ /// Cluster synchronization scope ID (single address space).
+ SyncScope::ID ClusterOneAddressSpaceSSID;
/// In AMDGPU target synchronization scopes are inclusive, meaning a
/// larger synchronization scope is inclusive of a smaller synchronization
@@ -60,12 +64,15 @@ class AMDGPUMachineModuleInfo final : public MachineModuleInfoELF {
else if (SSID == getWorkgroupSSID() ||
SSID == getWorkgroupOneAddressSpaceSSID())
return 2;
+ else if (SSID == getClusterSSID() ||
+ SSID == getClusterOneAddressSpaceSSID())
+ return 3;
else if (SSID == getAgentSSID() ||
SSID == getAgentOneAddressSpaceSSID())
- return 3;
+ return 4;
else if (SSID == SyncScope::System ||
SSID == getSystemOneAddressSpaceSSID())
- return 4;
+ return 5;
return std::nullopt;
}
@@ -73,7 +80,8 @@ class AMDGPUMachineModuleInfo final : public MachineModuleInfoELF {
/// \returns True if \p SSID is restricted to single address space, false
/// otherwise
bool isOneAddressSpace(SyncScope::ID SSID) const {
- return SSID == getSingleThreadOneAddressSpaceSSID() ||
+ return SSID == getClusterOneAddressSpaceSSID() ||
+ SSID == getSingleThreadOneAddressSpaceSSID() ||
SSID == getWavefrontOneAddressSpaceSSID() ||
SSID == getWorkgroupOneAddressSpaceSSID() ||
SSID == getAgentOneAddressSpaceSSID() ||
@@ -95,6 +103,8 @@ class AMDGPUMachineModuleInfo final : public MachineModuleInfoELF {
SyncScope::ID getWavefrontSSID() const {
return WavefrontSSID;
}
+ /// \returns Cluster synchronization scope ID (cross address space).
+ SyncScope::ID getClusterSSID() const { return ClusterSSID; }
/// \returns System synchronization scope ID (single address space).
SyncScope::ID getSystemOneAddressSpaceSSID() const {
return SystemOneAddressSpaceSSID;
@@ -115,6 +125,10 @@ class AMDGPUMachineModuleInfo final : public MachineModuleInfoELF {
SyncScope::ID getSingleThreadOneAddressSpaceSSID() const {
return SingleThreadOneAddressSpaceSSID;
}
+ /// \returns Single thread synchronization scope ID (single address space).
+ SyncScope::ID getClusterOneAddressSpaceSSID() const {
+ return ClusterOneAddressSpaceSSID;
+ }
/// In AMDGPU target synchronization scopes are inclusive, meaning a
/// larger synchronization scope is inclusive of a smaller synchronization
diff --git a/llvm/lib/Target/AMDGPU/GCNSubtarget.h b/llvm/lib/Target/AMDGPU/GCNSubtarget.h
index e172a9c699fb1..cbd6f64976d21 100644
--- a/llvm/lib/Target/AMDGPU/GCNSubtarget.h
+++ b/llvm/lib/Target/AMDGPU/GCNSubtarget.h
@@ -1833,6 +1833,9 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
return GFX1250Insts && getGeneration() == GFX12;
}
+ /// \returns true if the subtarget supports clusters of workgroups.
+ bool hasClusters() const { return GFX1250Insts; }
+
/// \returns true if the subtarget requires a wait for xcnt before atomic
/// flat/global stores & rmw.
bool requiresWaitXCntBeforeAtomicStores() const { return GFX1250Insts; }
diff --git a/llvm/lib/Target/AMDGPU/SIMemoryLegalizer.cpp b/llvm/lib/Target/AMDGPU/SIMemoryLegalizer.cpp
index 0be6a9d09379f..1637c06936f9b 100644
--- a/llvm/lib/Target/AMDGPU/SIMemoryLegalizer.cpp
+++ b/llvm/lib/Target/AMDGPU/SIMemoryLegalizer.cpp
@@ -63,6 +63,7 @@ enum class SIAtomicScope {
SINGLETHREAD,
WAVEFRONT,
WORKGROUP,
+ CLUSTER, // Promoted to AGENT on targets without workgroup clusters.
AGENT,
SYSTEM
};
@@ -106,6 +107,7 @@ class SIMemOpInfo final {
bool IsCooperative = false;
SIMemOpInfo(
+ const GCNSubtarget &ST,
AtomicOrdering Ordering = AtomicOrdering::SequentiallyConsistent,
SIAtomicScope Scope = SIAtomicScope::SYSTEM,
SIAtomicAddrSpace OrderingAddrSpace = SIAtomicAddrSpace::ATOMIC,
@@ -156,6 +158,11 @@ class SIMemOpInfo final {
SIAtomicAddrSpace::GDS)) == SIAtomicAddrSpace::NONE) {
this->Scope = std::min(Scope, SIAtomicScope::AGENT);
}
+
+ // On targets that have no concept of a workgroup cluster, use
+ // AGENT scope as a conservatively correct alternative.
+ if (this->Scope == SIAtomicScope::CLUSTER && !ST.hasClusters())
+ this->Scope = SIAtomicScope::AGENT;
}
public:
@@ -225,6 +232,7 @@ class SIMemOpInfo final {
class SIMemOpAccess final {
private:
const AMDGPUMachineModuleInfo *MMI = nullptr;
+ const GCNSubtarget &ST;
/// Reports unsupported message \p Msg for \p MI to LLVM context.
void reportUnsupported(const MachineBasicBlock::iterator &MI,
@@ -248,7 +256,7 @@ class SIMemOpAccess final {
public:
/// Construct class to support accessing the machine memory operands
/// of instructions in the machine function \p MF.
- SIMemOpAccess(const AMDGPUMachineModuleInfo &MMI);
+ SIMemOpAccess(const AMDGPUMachineModuleInfo &MMI, const GCNSubtarget &ST);
/// \returns Load info if \p MI is a load operation, "std::nullopt" otherwise.
std::optional<SIMemOpInfo>
@@ -773,6 +781,8 @@ SIMemOpAccess::toSIAtomicScope(SyncScope::ID SSID,
return std::tuple(SIAtomicScope::SYSTEM, SIAtomicAddrSpace::ATOMIC, true);
if (SSID == MMI->getAgentSSID())
return std::tuple(SIAtomicScope::AGENT, SIAtomicAddrSpace::ATOMIC, true);
+ if (SSID == MMI->getClusterSSID())
+ return std::tuple(SIAtomicScope::CLUSTER, SIAtomicAddrSpace::ATOMIC, true);
if (SSID == MMI->getWorkgroupSSID())
return std::tuple(SIAtomicScope::WORKGROUP, SIAtomicAddrSpace::ATOMIC,
true);
@@ -788,6 +798,9 @@ SIMemOpAccess::toSIAtomicScope(SyncScope::ID SSID,
if (SSID == MMI->getAgentOneAddressSpaceSSID())
return std::tuple(SIAtomicScope::AGENT,
SIAtomicAddrSpace::ATOMIC & InstrAddrSpace, false);
+ if (SSID == MMI->getClusterOneAddressSpaceSSID())
+ return std::tuple(SIAtomicScope::CLUSTER,
+ SIAtomicAddrSpace::ATOMIC & InstrAddrSpace, false);
if (SSID == MMI->getWorkgroupOneAddressSpaceSSID())
return std::tuple(SIAtomicScope::WORKGROUP,
SIAtomicAddrSpace::ATOMIC & InstrAddrSpace, false);
@@ -815,8 +828,9 @@ SIAtomicAddrSpace SIMemOpAccess::toSIAtomicAddrSpace(unsigned AS) const {
return SIAtomicAddrSpace::OTHER;
}
-SIMemOpAccess::SIMemOpAccess(const AMDGPUMachineModuleInfo &MMI_)
- : MMI(&MMI_) {}
+SIMemOpAccess::SIMemOpAccess(const AMDGPUMachineModuleInfo &MMI_,
+ const GCNSubtarget &ST)
+ : MMI(&MMI_), ST(ST) {}
std::optional<SIMemOpInfo> SIMemOpAccess::constructFromMIWithMMO(
const MachineBasicBlock::iterator &MI) const {
@@ -877,7 +891,7 @@ std::optional<SIMemOpInfo> SIMemOpAccess::constructFromMIWithMMO(
return std::nullopt;
}
}
- return SIMemOpInfo(Ordering, Scope, OrderingAddrSpace, InstrAddrSpace,
+ return SIMemOpInfo(ST, Ordering, Scope, OrderingAddrSpace, InstrAddrSpace,
IsCrossAddressSpaceOrdering, FailureOrdering, IsVolatile,
IsNonTemporal, IsLastUse, IsCooperative);
}
@@ -891,7 +905,7 @@ SIMemOpAccess::getLoadInfo(const MachineBasicBlock::iterator &MI) const {
// Be conservative if there are no memory operands.
if (MI->getNumMemOperands() == 0)
- return SIMemOpInfo();
+ return SIMemOpInfo(ST);
return constructFromMIWithMMO(MI);
}
@@ -905,7 +919,7 @@ SIMemOpAccess::getStoreInfo(const MachineBasicBlock::iterator &MI) const {
// Be conservative if there are no memory operands.
if (MI->getNumMemOperands() == 0)
- return SIMemOpInfo();
+ return SIMemOpInfo(ST);
return constructFromMIWithMMO(MI);
}
@@ -946,8 +960,9 @@ SIMemOpAccess::getAtomicFenceInfo(const MachineBasicBlock::iterator &MI) const {
if (SynchronizeAS)
OrderingAddrSpace = *SynchronizeAS;
- return SIMemOpInfo(Ordering, Scope, OrderingAddrSpace, SIAtomicAddrSpace::ATOMIC,
- IsCrossAddressSpaceOrdering, AtomicOrdering::NotAtomic);
+ return SIMemOpInfo(ST, Ordering, Scope, OrderingAddrSpace,
+ SIAtomicAddrSpace::ATOMIC, IsCrossAddressSpaceOrdering,
+ AtomicOrdering::NotAtomic);
}
std::optional<SIMemOpInfo> SIMemOpAccess::getAtomicCmpxchgOrRmwInfo(
@@ -959,7 +974,7 @@ std::optional<SIMemOpInfo> SIMemOpAccess::getAtomicCmpxchgOrRmwInfo(
// Be conservative if there are no memory operands.
if (MI->getNumMemOperands() == 0)
- return SIMemOpInfo();
+ return SIMemOpInfo(ST);
return constructFromMIWithMMO(MI);
}
@@ -2377,6 +2392,7 @@ bool SIGfx12CacheControl::insertWait(MachineBasicBlock::iterator &MI,
switch (Scope) {
case SIAtomicScope::SYSTEM:
case SIAtomicScope::AGENT:
+ case SIAtomicScope::CLUSTER:
if ((Op & SIMemOp::LOAD) != SIMemOp::NONE)
LOADCnt |= true;
if ((Op & SIMemOp::STORE) != SIMemOp::NONE)
@@ -2413,6 +2429,7 @@ bool SIGfx12CacheControl::insertWait(MachineBasicBlock::iterator &MI,
switch (Scope) {
case SIAtomicScope::SYSTEM:
case SIAtomicScope::AGENT:
+ case SIAtomicScope::CLUSTER:
case SIAtomicScope::WORKGROUP:
// If no cross address space ordering then an "S_WAITCNT lgkmcnt(0)" is
// not needed as LDS operations for all waves are executed in a total
@@ -2495,6 +2512,9 @@ bool SIGfx12CacheControl::insertAcquire(MachineBasicBlock::iterator &MI,
case SIAtomicScope::AGENT:
ScopeImm = AMDGPU::CPol::SCOPE_DEV;
break;
+ case SIAtomicScope::CLUSTER:
+ ScopeImm = AMDGPU::CPol::SCOPE_SE;
+ break;
case SIAtomicScope::WORKGROUP:
// GFX12.0:
// In WGP mode the waves of a work-group can be executing on either CU of
@@ -2565,6 +2585,7 @@ bool SIGfx12CacheControl::insertRelease(MachineBasicBlock::iterator &MI,
.addImm(AMDGPU::CPol::SCOPE_DEV);
}
break;
+ case SIAtomicScope::CLUSTER:
case SIAtomicScope::WORKGROUP:
// No WB necessary, but we still have to wait.
break;
@@ -2649,11 +2670,8 @@ bool SIGfx12CacheControl::finalizeStore(MachineInstr &MI, bool Atomic) const {
const unsigned Scope = CPol->getImm() & CPol::SCOPE;
// GFX12.0 only: Extra waits needed before system scope stores.
- if (!ST.hasGFX1250Insts()) {
- if (!Atomic && Scope == CPol::SCOPE_SYS)
- return insertWaitsBeforeSystemScopeStore(MI);
- return Changed;
- }
+ if (!ST.hasGFX1250Insts() && !Atomic && Scope == CPol::SCOPE_SYS)
+ Changed |= insertWaitsBeforeSystemScopeStore(MI.getIterator());
return Changed;
}
@@ -2684,6 +2702,9 @@ bool SIGfx12CacheControl::setAtomicScope(const MachineBasicBlock::iterator &MI,
case SIAtomicScope::AGENT:
Changed |= setScope(MI, AMDGPU::CPol::SCOPE_DEV);
break;
+ case SIAtomicScope::CLUSTER:
+ Changed |= setScope(MI, AMDGPU::CPol::SCOPE_SE);
+ break;
case SIAtomicScope::WORKGROUP:
// In workgroup mode, SCOPE_SE is needed as waves can executes on
// different CUs that access different L0s.
@@ -2930,8 +2951,8 @@ SIMemoryLegalizerPass::run(MachineFunction &MF,
bool SIMemoryLegalizer::run(MachineFunction &MF) {
bool Changed = false;
- SIMemOpAccess MOA(MMI.getObjFileInfo<AMDGPUMachineModuleInfo>());
const GCNSubtarget &ST = MF.getSubtarget<GCNSubtarget>();
+ SIMemOpAccess MOA(MMI.getObjFileInfo<AMDGPUMachineModuleInfo>(), ST);
CC = SICacheControl::create(ST);
for (auto &MBB : MF) {
diff --git a/llvm/test/CodeGen/AMDGPU/memory-legalizer-fence.ll b/llvm/test/CodeGen/AMDGPU/memory-legalizer-fence.ll
index 736a8b58466dd..d288bfc6a09db 100644
--- a/llvm/test/CodeGen/AMDGPU/memory-legalizer-fence.ll
+++ b/llvm/test/CodeGen/AMDGPU/memory-legalizer-fence.ll
@@ -1632,6 +1632,801 @@ entry:
ret void
}
+
+define amdgpu_kernel void @cluster_acquire_fence() {
+; GFX6-LABEL: cluster_acquire_fence:
+; GFX6: ; %bb.0: ; %entry
+; GFX6-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT: buffer_wbinvl1
+; GFX6-NEXT: s_endpgm
+;
+; GFX7-LABEL: cluster_acquire_fence:
+; GFX7: ; %bb.0: ; %entry
+; GFX7-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT: buffer_wbinvl1_vol
+; GFX7-NEXT: s_endpgm
+;
+; GFX10-WGP-LABEL: cluster_acquire_fence:
+; GFX10-WGP: ; %bb.0: ; %entry
+; GFX10-WGP-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX10-WGP-NEXT: s_waitcnt_vscnt null, 0x0
+; GFX10-WGP-NEXT: buffer_gl1_inv
+; GFX10-WGP-NEXT: buffer_gl0_inv
+; GFX10-WGP-NEXT: s_endpgm
+;
+; GFX10-CU-LABEL: cluster_acquire_fence:
+; GFX10-CU: ; %bb.0: ; %entry
+; GFX10-CU-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX10-CU-NEXT: s_waitcnt_vscnt null, 0x0
+; GFX10-CU-NEXT: buffer_gl1_inv
+; GFX10-CU-NEXT: buffer_gl0_inv
+; GFX10-CU-NEXT: s_endpgm
+;
+; SKIP-CACHE-INV-LABEL: cluster_acquire_fence:
+; SKIP-CACHE-INV: ; %bb.0: ; %entry
+; SKIP-CACHE-INV-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; SKIP-CACHE-INV-NEXT: s_endpgm
+;
+; GFX90A-NOTTGSPLIT-LABEL: cluster_acquire_fence:
+; GFX90A-NOTTGSPLIT: ; %bb.0: ; %entry
+; GFX90A-NOTTGSPLIT-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX90A-NOTTGSPLIT-NEXT: buffer_wbinvl1_vol
+; GFX90A-NOTTGSPLIT-NEXT: s_endpgm
+;
+; GFX90A-TGSPLIT-LABEL: cluster_acquire_fence:
+; GFX90A-TGSPLIT: ; %bb.0: ; %entry
+; GFX90A-TGSPLIT-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX90A-TGSPLIT-NEXT: buffer_wbinvl1_vol
+; GFX90A-TGSPLIT-NEXT: s_endpgm
+;
+; GFX942-NOTTGSPLIT-LABEL: cluster_acquire_fence:
+; GFX942-NOTTGSPLIT: ; %bb.0: ; %entry
+; GFX942-NOTTGSPLIT-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX942-NOTTGSPLIT-NEXT: buffer_inv sc1
+; GFX942-NOTTGSPLIT-NEXT: s_endpgm
+;
+; GFX942-TGSPLIT-LABEL: cluster_acquire_fence:
+; GFX942-TGSPLIT: ; %bb.0: ; %entry
+; GFX942-TGSPLIT-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX942-TGSPLIT-NEXT: buffer_inv sc1
+; GFX942-TGSPLIT-NEXT: s_endpgm
+;
+; GFX11-WGP-LABEL: cluster_acquire_fence:
+; GFX11-WGP: ; %bb.0: ; %entry
+; GFX11-WGP-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX11-WGP-NEXT: s_waitcnt_vscnt null, 0x0
+; GFX11-WGP-NEXT: buffer_gl1_inv
+; GFX11-WGP-NEXT: buffer_gl0_inv
+; GFX11-WGP-NEXT: s_endpgm
+;
+; GFX11-CU-LABEL: cluster_acquire_fence:
+; GFX11-CU: ; %bb.0: ; %entry
+; GFX11-CU-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX11-CU-NEXT: s_waitcnt_vscnt null, 0x0
+; GFX11-CU-NEXT: buffer_gl1_inv
+; GFX11-CU-NEXT: buffer_gl0_inv
+; GFX11-CU-NEXT: s_endpgm
+;
+; GFX12-WGP-LABEL: cluster_acquire_fence:
+; GFX12-WGP: ; %bb.0: ; %entry
+; GFX12-WGP-NEXT: s_wait_storecnt 0x0
+; GFX12-WGP-NEXT: s_wait_loadcnt_dscnt 0x0
+; GFX12-WGP-NEXT: global_inv scope:SCOPE_DEV
+; GFX12-WGP-NEXT: s_endpgm
+;
+; GFX12-CU-LABEL: cluster_acquire_fence:
+; GFX12-CU: ; %bb.0: ; %entry
+; GFX12-CU-NEXT: s_wait_storecnt 0x0
+; GFX12-CU-NEXT: s_wait_loadcnt_dscnt 0x0
+; GFX12-CU-NEXT: global_inv scope:SCOPE_DEV
+; GFX12-CU-NEXT: s_endpgm
+;
+; GFX1250-LABEL: cluster_acquire_fence:
+; GFX1250: ; %bb.0: ; %entry
+; GFX1250-NEXT: s_wait_storecnt 0x0
+; GFX1250-NEXT: s_wait_loadcnt_dscnt 0x0
+; GFX1250-NEXT: global_inv scope:SCOPE_SE
+; GFX1250-NEXT: s_endpgm
+entry:
+ fence syncscope("cluster") acquire
+ ret void
+}
+
+define amdgpu_kernel void @cluster_release_fence() {
+; GFX6-LABEL: cluster_release_fence:
+; GFX6: ; %bb.0: ; %entry
+; GFX6-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX6-NEXT: s_endpgm
+;
+; GFX7-LABEL: cluster_release_fence:
+; GFX7: ; %bb.0: ; %entry
+; GFX7-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
+; GFX7-NEXT: s_endpgm
+;
+; GFX10-WGP-LABEL: cluster_release_fence:
+; GFX10-WGP: ; ...
[truncated]
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Defaults to "agent" for targets that do not support it. - Add documentation - Register it in MachineModuleInfo - Add MemoryLegalizer support
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| SyncScope::ID getSingleThreadOneAddressSpaceSSID() const { | ||
| return SingleThreadOneAddressSpaceSSID; | ||
| } | ||
| /// \returns Single thread synchronization scope ID (single address space). |
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Defaults to "agent" for targets that do not support it.