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[NVPTX][clang] Fixup support for bar0 reduction builtins #173312

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[NVPTX][clang] Fixup support for bar0 reduction builtins #173312

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21 changes: 21 additions & 0 deletions clang/lib/CodeGen/TargetBuiltins/NVPTX.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1197,6 +1197,27 @@ Value *CodeGenFunction::EmitNVPTXBuiltinExpr(unsigned BuiltinID,
return Builder.CreateCall(
CGM.getIntrinsic(Intrinsic::nvvm_barrier_cta_sync_count),
{EmitScalarExpr(E->getArg(0)), EmitScalarExpr(E->getArg(1))});
case NVPTX::BI__nvvm_bar0_and:
return Builder.CreateZExt(
Builder.CreateIntrinsic(
Intrinsic::nvvm_barrier_cta_red_and_aligned_all, {},
{Builder.getInt32(0),
Builder.CreateICmpNE(EmitScalarExpr(E->getArg(0)),
Builder.getInt32(0))}),
Builder.getInt32Ty());
case NVPTX::BI__nvvm_bar0_or:
return Builder.CreateZExt(
Builder.CreateIntrinsic(
Intrinsic::nvvm_barrier_cta_red_or_aligned_all, {},
{Builder.getInt32(0),
Builder.CreateICmpNE(EmitScalarExpr(E->getArg(0)),
Builder.getInt32(0))}),
Builder.getInt32Ty());
case NVPTX::BI__nvvm_bar0_popc:
return Builder.CreateIntrinsic(
Intrinsic::nvvm_barrier_cta_red_popc_aligned_all, {},
{Builder.getInt32(0), Builder.CreateICmpNE(EmitScalarExpr(E->getArg(0)),
Builder.getInt32(0))});
default:
return nullptr;
}
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21 changes: 21 additions & 0 deletions clang/test/CodeGen/builtins-nvptx.c
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Original file line number Diff line number Diff line change
Expand Up @@ -272,6 +272,27 @@ __device__ void nvvm_math(float f1, float f2, double d1, double d2) {
__syncthreads();
}

__device__ int nvvm_bar0_reductions(int i) {
// CHECK-LABEL: nvvm_bar0_reductions

int ret = 0;
// CHECK: %[[NE:[0-9]+]] = icmp ne i32 %{{[0-9]+}}, 0
// CHECK: %[[AND:[0-9]+]] = call i1 @llvm.nvvm.barrier.cta.red.and.aligned.all(i32 0, i1 %[[NE]])
// CHECK: zext i1 %[[AND]] to i32
ret += __nvvm_bar0_and(i);

// CHECK: %[[NE:[0-9]+]] = icmp ne i32 %{{[0-9]+}}, 0
// CHECK: %[[OR:[0-9]+]] = call i1 @llvm.nvvm.barrier.cta.red.or.aligned.all(i32 0, i1 %[[NE]])
// CHECK: zext i1 %[[OR]] to i32
ret += __nvvm_bar0_or(i);

// CHECK: %[[NE:[0-9]+]] = icmp ne i32 %{{[0-9]+}}, 0
// CHECK: %[[POPC:[0-9]+]] = call i32 @llvm.nvvm.barrier.cta.red.popc.aligned.all(i32 0, i1 %[[NE]])
ret += __nvvm_bar0_popc(i);

return ret;
}

__device__ int di;
__shared__ int si;
__device__ long dl;
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