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Fixed DAGTypeLegalizer::SplitVecOp_EXTRACT_VECTOR_ELT i1 handling

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Legalizer used to request an ext load from i8 to i1 when promoting
vector element type to i8. Fixed.

Differential Revision: https://reviews.llvm.org/D54440

llvm-svn: 346795
This commit is contained in:
Stanislav Mekhanoshin 2018-11-13 20:26:27 +00:00
parent 0ad4ee4225
commit e469694231
2 changed files with 37 additions and 0 deletions
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9
lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
View File

@ -1934,6 +1934,15 @@ SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
// Load back the required element.
StackPtr = TLI.getVectorElementPointer(DAG, StackPtr, VecVT, Idx);
// FIXME: This is to handle i1 vectors with elements promoted to i8.
// i1 vector handling needs general improvement.
if (N->getValueType(0).bitsLT(EltVT)) {
SDValue Load = DAG.getLoad(EltVT, dl, Store, StackPtr,
MachinePointerInfo::getUnknownStack(DAG.getMachineFunction()));
return DAG.getZExtOrTrunc(Load, dl, N->getValueType(0));
}
return DAG.getExtLoad(
ISD::EXTLOAD, dl, N->getValueType(0), Store, StackPtr,
MachinePointerInfo::getUnknownStack(DAG.getMachineFunction()), EltVT);

28
test/CodeGen/AMDGPU/extract_vector_dynelt.ll Normal file
View File

@ -0,0 +1,28 @@
; RUN: llc -march=amdgcn -mcpu=fiji -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefixes=GCN %s
; GCN-LABEL: {{^}}bit4_extelt:
; GCN-DAG: v_mov_b32_e32 [[ZERO:v[0-9]+]], 0
; GCN-DAG: v_mov_b32_e32 [[ONE:v[0-9]+]], 1
; GCN-DAG: buffer_store_byte [[ZERO]],
; GCN-DAG: buffer_store_byte [[ONE]],
; GCN-DAG: buffer_store_byte [[ZERO]],
; GCN-DAG: buffer_store_byte [[ONE]],
; GCN: buffer_load_ubyte [[LOAD:v[0-9]+]],
; GCN: v_and_b32_e32 [[RES:v[0-9]+]], 1, [[LOAD]]
; GCN: flat_store_dword v[{{[0-9:]+}}], [[RES]]
define amdgpu_kernel void @bit4_extelt(i32 addrspace(1)* %out, i32 %sel) {
entry:
%ext = extractelement <4 x i1> <i1 0, i1 1, i1 0, i1 1>, i32 %sel
%zext = zext i1 %ext to i32
store i32 %zext, i32 addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}bit128_extelt:
define amdgpu_kernel void @bit128_extelt(i32 addrspace(1)* %out, i32 %sel) {
entry:
%ext = extractelement <128 x i1> <i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0, i1 1, i1 0>, i32 %sel
%zext = zext i1 %ext to i32
store i32 %zext, i32 addrspace(1)* %out
ret void
}