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swiftshader
Commit 106e0158 by Googler Committed by swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com
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Support LLVM 11+ atomic instruction alignment change

Atomic instructions now take an alignment parameter. llvm::MaybeAlign() means undefined alignment, which makes the compiler emit atomic operations that can handle unaligned data. This is probably overly conservative since our use cases typically ensure alignment. But that's an optimization we can prudently make later if/when proven useful. Bug: b/165000222 Change-Id: I2d0f0f0b5ae8ca811e97c2f5e2f34cc06ca7ee09 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/53308 Presubmit-Ready: Nicolas Capens <nicolascapens@google.com> Tested-by: 's avatarNicolas Capens <nicolascapens@google.com> Reviewed-by: 's avatarAntonio Maiorano <amaiorano@google.com> Kokoro-Result: kokoro <noreply+kokoro@google.com> Commit-Queue: Nicolas Capens <nicolascapens@google.com>
parent d69cfa3a
Showing with 56 additions and 11 deletions
src/Reactor/LLVMReactor.cpp
......@@ -1297,61 +1297,101 @@ Value *Nucleus::createGEP(Value *ptr, Type *type, Value *index, bool unsignedInd
Value *Nucleus::createAtomicAdd(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Add, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Add, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicSub(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Sub, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Sub, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicAnd(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::And, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::And, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicOr(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Or, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Or, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicXor(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Xor, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Xor, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicMin(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Min, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Min, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicMax(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Max, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Max, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicUMin(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::UMin, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::UMin, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicUMax(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::UMax, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::UMax, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicExchange(Value *ptr, Value *value, std::memory_order memoryOrder)
{
RR_DEBUG_INFO_UPDATE_LOC();
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Xchg, V(ptr), V(value), atomicOrdering(true, memoryOrder)));
return V(jit->builder->CreateAtomicRMW(llvm::AtomicRMWInst::Xchg, V(ptr), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrder)));
}
Value *Nucleus::createAtomicCompareExchange(Value *ptr, Value *value, Value *compare, std::memory_order memoryOrderEqual, std::memory_order memoryOrderUnequal)
......@@ -1359,7 +1399,12 @@ Value *Nucleus::createAtomicCompareExchange(Value *ptr, Value *value, Value *com
RR_DEBUG_INFO_UPDATE_LOC();
// Note: AtomicCmpXchgInstruction returns a 2-member struct containing {result, success-flag}, not the result directly.
return V(jit->builder->CreateExtractValue(
jit->builder->CreateAtomicCmpXchg(V(ptr), V(compare), V(value), atomicOrdering(true, memoryOrderEqual), atomicOrdering(true, memoryOrderUnequal)),
jit->builder->CreateAtomicCmpXchg(V(ptr), V(compare), V(value),
#if LLVM_VERSION_MAJOR >= 11
llvm::MaybeAlign(),
#endif
atomicOrdering(true, memoryOrderEqual),
atomicOrdering(true, memoryOrderUnequal)),
llvm::ArrayRef<unsigned>(0u)));
}
......
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