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AMDGPU/SI: Pass whether to use the SI scheduler via Target Attribute

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Summary:
Currently the SI scheduler can be selected via command line option,
but it turned out it would be better if it was selectable via a Target Attribute.

This patch adds "si-scheduler" attribute to the backend.

Reviewers: tstellarAMD, echristo

Subscribers: echristo, arsenm

Differential Revision: http://reviews.llvm.org/D16192

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258386 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2016-01-21 04:28:34 +00:00
parent 37c2652ad9
commit 72304925ab
4 changed files with 13 additions and 1 deletions
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5
lib/Target/AMDGPU/AMDGPU.td
View File

@ -144,6 +144,11 @@ def FeatureEnableHugeScratchBuffer : SubtargetFeature<"huge-scratch-buffer",
"true",
"Enable scratch buffer sizes greater than 128 GB">;
def FeatureEnableSIScheduler : SubtargetFeature<"si-scheduler",
"EnableSIScheduler",
"true",
"Enable SI Machine Scheduler">;
class SubtargetFeatureFetchLimit <string Value> :
SubtargetFeature <"fetch"#Value,
"TexVTXClauseSize",

2
lib/Target/AMDGPU/AMDGPUSubtarget.cpp
View File

@ -81,7 +81,7 @@ AMDGPUSubtarget::AMDGPUSubtarget(const Triple &TT, StringRef GPU, StringRef FS,
EnableVGPRSpilling(false), SGPRInitBug(false), IsGCN(false),
GCN1Encoding(false), GCN3Encoding(false), CIInsts(false), LDSBankCount(0),
IsaVersion(ISAVersion0_0_0), EnableHugeScratchBuffer(false),
FrameLowering(nullptr),
EnableSIScheduler(false), FrameLowering(nullptr),
InstrItins(getInstrItineraryForCPU(GPU)), TargetTriple(TT) {
initializeSubtargetDependencies(TT, GPU, FS);

5
lib/Target/AMDGPU/AMDGPUSubtarget.h
View File

@ -92,6 +92,7 @@ private:
int LDSBankCount;
unsigned IsaVersion;
bool EnableHugeScratchBuffer;
bool EnableSIScheduler;
std::unique_ptr<AMDGPUFrameLowering> FrameLowering;
std::unique_ptr<AMDGPUTargetLowering> TLInfo;
@ -286,6 +287,10 @@ public:
return EnableHugeScratchBuffer;
}
bool enableSIScheduler() const {
return EnableSIScheduler;
}
bool dumpCode() const {
return DumpCode;
}

2
lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
View File

@ -148,6 +148,8 @@ public:
const AMDGPUSubtarget &ST = *getAMDGPUTargetMachine().getSubtargetImpl();
if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS)
return createR600MachineScheduler(C);
else if (ST.enableSIScheduler())
return createSIMachineScheduler(C);
return nullptr;
}