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Diffstat (limited to 'llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.cpp')
-rw-r--r--llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.cpp119
1 files changed, 84 insertions, 35 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.cpp
index 99a01ca3a2fd..d078fc147a36 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUArgumentUsageInfo.cpp
@@ -8,6 +8,8 @@
#include "AMDGPU.h"
#include "AMDGPUArgumentUsageInfo.h"
+#include "AMDGPUTargetMachine.h"
+#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIRegisterInfo.h"
#include "llvm/Support/NativeFormatting.h"
#include "llvm/Support/raw_ostream.h"
@@ -43,6 +45,10 @@ char AMDGPUArgumentUsageInfo::ID = 0;
const AMDGPUFunctionArgInfo AMDGPUArgumentUsageInfo::ExternFunctionInfo{};
+// Hardcoded registers from fixed function ABI
+const AMDGPUFunctionArgInfo AMDGPUArgumentUsageInfo::FixedABIFunctionInfo
+ = AMDGPUFunctionArgInfo::fixedABILayout();
+
bool AMDGPUArgumentUsageInfo::doInitialization(Module &M) {
return false;
}
@@ -77,59 +83,102 @@ void AMDGPUArgumentUsageInfo::print(raw_ostream &OS, const Module *M) const {
}
}
-std::pair<const ArgDescriptor *, const TargetRegisterClass *>
+std::tuple<const ArgDescriptor *, const TargetRegisterClass *, LLT>
AMDGPUFunctionArgInfo::getPreloadedValue(
- AMDGPUFunctionArgInfo::PreloadedValue Value) const {
+ AMDGPUFunctionArgInfo::PreloadedValue Value) const {
switch (Value) {
case AMDGPUFunctionArgInfo::PRIVATE_SEGMENT_BUFFER: {
- return std::make_pair(
- PrivateSegmentBuffer ? &PrivateSegmentBuffer : nullptr,
- &AMDGPU::SGPR_128RegClass);
+ return std::make_tuple(PrivateSegmentBuffer ? &PrivateSegmentBuffer
+ : nullptr,
+ &AMDGPU::SGPR_128RegClass, LLT::vector(4, 32));
}
case AMDGPUFunctionArgInfo::IMPLICIT_BUFFER_PTR:
- return std::make_pair(ImplicitBufferPtr ? &ImplicitBufferPtr : nullptr,
- &AMDGPU::SGPR_64RegClass);
+ return std::make_tuple(ImplicitBufferPtr ? &ImplicitBufferPtr : nullptr,
+ &AMDGPU::SGPR_64RegClass,
+ LLT::pointer(AMDGPUAS::CONSTANT_ADDRESS, 64));
case AMDGPUFunctionArgInfo::WORKGROUP_ID_X:
- return std::make_pair(WorkGroupIDX ? &WorkGroupIDX : nullptr,
- &AMDGPU::SGPR_32RegClass);
-
+ return std::make_tuple(WorkGroupIDX ? &WorkGroupIDX : nullptr,
+ &AMDGPU::SGPR_32RegClass, LLT::scalar(32));
case AMDGPUFunctionArgInfo::WORKGROUP_ID_Y:
- return std::make_pair(WorkGroupIDY ? &WorkGroupIDY : nullptr,
- &AMDGPU::SGPR_32RegClass);
+ return std::make_tuple(WorkGroupIDY ? &WorkGroupIDY : nullptr,
+ &AMDGPU::SGPR_32RegClass, LLT::scalar(32));
case AMDGPUFunctionArgInfo::WORKGROUP_ID_Z:
- return std::make_pair(WorkGroupIDZ ? &WorkGroupIDZ : nullptr,
- &AMDGPU::SGPR_32RegClass);
+ return std::make_tuple(WorkGroupIDZ ? &WorkGroupIDZ : nullptr,
+ &AMDGPU::SGPR_32RegClass, LLT::scalar(32));
case AMDGPUFunctionArgInfo::PRIVATE_SEGMENT_WAVE_BYTE_OFFSET:
- return std::make_pair(
- PrivateSegmentWaveByteOffset ? &PrivateSegmentWaveByteOffset : nullptr,
- &AMDGPU::SGPR_32RegClass);
+ return std::make_tuple(
+ PrivateSegmentWaveByteOffset ? &PrivateSegmentWaveByteOffset : nullptr,
+ &AMDGPU::SGPR_32RegClass, LLT::scalar(32));
case AMDGPUFunctionArgInfo::KERNARG_SEGMENT_PTR:
- return std::make_pair(KernargSegmentPtr ? &KernargSegmentPtr : nullptr,
- &AMDGPU::SGPR_64RegClass);
+ return std::make_tuple(KernargSegmentPtr ? &KernargSegmentPtr : nullptr,
+ &AMDGPU::SGPR_64RegClass,
+ LLT::pointer(AMDGPUAS::CONSTANT_ADDRESS, 64));
case AMDGPUFunctionArgInfo::IMPLICIT_ARG_PTR:
- return std::make_pair(ImplicitArgPtr ? &ImplicitArgPtr : nullptr,
- &AMDGPU::SGPR_64RegClass);
+ return std::make_tuple(ImplicitArgPtr ? &ImplicitArgPtr : nullptr,
+ &AMDGPU::SGPR_64RegClass,
+ LLT::pointer(AMDGPUAS::CONSTANT_ADDRESS, 64));
case AMDGPUFunctionArgInfo::DISPATCH_ID:
- return std::make_pair(DispatchID ? &DispatchID : nullptr,
- &AMDGPU::SGPR_64RegClass);
+ return std::make_tuple(DispatchID ? &DispatchID : nullptr,
+ &AMDGPU::SGPR_64RegClass, LLT::scalar(64));
case AMDGPUFunctionArgInfo::FLAT_SCRATCH_INIT:
- return std::make_pair(FlatScratchInit ? &FlatScratchInit : nullptr,
- &AMDGPU::SGPR_64RegClass);
+ return std::make_tuple(FlatScratchInit ? &FlatScratchInit : nullptr,
+ &AMDGPU::SGPR_64RegClass, LLT::scalar(64));
case AMDGPUFunctionArgInfo::DISPATCH_PTR:
- return std::make_pair(DispatchPtr ? &DispatchPtr : nullptr,
- &AMDGPU::SGPR_64RegClass);
+ return std::make_tuple(DispatchPtr ? &DispatchPtr : nullptr,
+ &AMDGPU::SGPR_64RegClass,
+ LLT::pointer(AMDGPUAS::CONSTANT_ADDRESS, 64));
case AMDGPUFunctionArgInfo::QUEUE_PTR:
- return std::make_pair(QueuePtr ? &QueuePtr : nullptr,
- &AMDGPU::SGPR_64RegClass);
+ return std::make_tuple(QueuePtr ? &QueuePtr : nullptr,
+ &AMDGPU::SGPR_64RegClass,
+ LLT::pointer(AMDGPUAS::CONSTANT_ADDRESS, 64));
case AMDGPUFunctionArgInfo::WORKITEM_ID_X:
- return std::make_pair(WorkItemIDX ? &WorkItemIDX : nullptr,
- &AMDGPU::VGPR_32RegClass);
+ return std::make_tuple(WorkItemIDX ? &WorkItemIDX : nullptr,
+ &AMDGPU::VGPR_32RegClass, LLT::scalar(32));
case AMDGPUFunctionArgInfo::WORKITEM_ID_Y:
- return std::make_pair(WorkItemIDY ? &WorkItemIDY : nullptr,
- &AMDGPU::VGPR_32RegClass);
+ return std::make_tuple(WorkItemIDY ? &WorkItemIDY : nullptr,
+ &AMDGPU::VGPR_32RegClass, LLT::scalar(32));
case AMDGPUFunctionArgInfo::WORKITEM_ID_Z:
- return std::make_pair(WorkItemIDZ ? &WorkItemIDZ : nullptr,
- &AMDGPU::VGPR_32RegClass);
+ return std::make_tuple(WorkItemIDZ ? &WorkItemIDZ : nullptr,
+ &AMDGPU::VGPR_32RegClass, LLT::scalar(32));
}
llvm_unreachable("unexpected preloaded value type");
}
+
+constexpr AMDGPUFunctionArgInfo AMDGPUFunctionArgInfo::fixedABILayout() {
+ AMDGPUFunctionArgInfo AI;
+ AI.PrivateSegmentBuffer
+ = ArgDescriptor::createRegister(AMDGPU::SGPR0_SGPR1_SGPR2_SGPR3);
+ AI.DispatchPtr = ArgDescriptor::createRegister(AMDGPU::SGPR4_SGPR5);
+ AI.QueuePtr = ArgDescriptor::createRegister(AMDGPU::SGPR6_SGPR7);
+
+ // Do not pass kernarg segment pointer, only pass increment version in its
+ // place.
+ AI.ImplicitArgPtr = ArgDescriptor::createRegister(AMDGPU::SGPR8_SGPR9);
+ AI.DispatchID = ArgDescriptor::createRegister(AMDGPU::SGPR10_SGPR11);
+
+ // Skip FlatScratchInit/PrivateSegmentSize
+ AI.WorkGroupIDX = ArgDescriptor::createRegister(AMDGPU::SGPR12);
+ AI.WorkGroupIDY = ArgDescriptor::createRegister(AMDGPU::SGPR13);
+ AI.WorkGroupIDZ = ArgDescriptor::createRegister(AMDGPU::SGPR14);
+
+ const unsigned Mask = 0x3ff;
+ AI.WorkItemIDX = ArgDescriptor::createRegister(AMDGPU::VGPR31, Mask);
+ AI.WorkItemIDY = ArgDescriptor::createRegister(AMDGPU::VGPR31, Mask << 10);
+ AI.WorkItemIDZ = ArgDescriptor::createRegister(AMDGPU::VGPR31, Mask << 20);
+ return AI;
+}
+
+const AMDGPUFunctionArgInfo &
+AMDGPUArgumentUsageInfo::lookupFuncArgInfo(const Function &F) const {
+ auto I = ArgInfoMap.find(&F);
+ if (I == ArgInfoMap.end()) {
+ if (AMDGPUTargetMachine::EnableFixedFunctionABI)
+ return FixedABIFunctionInfo;
+
+ // Without the fixed ABI, we assume no function has special inputs.
+ assert(F.isDeclaration());
+ return ExternFunctionInfo;
+ }
+
+ return I->second;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-11 12:28:19 +0000