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AMDGPU: Fix groupstaticsize for large LDS
The size can exceed s_movk_i32's limit, and we don't want to use it this early since it inhibits optimizations. This should probably be merged to the release branch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276438 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1433,7 +1433,7 @@ MachineBasicBlock *SITargetLowering::EmitInstrWithCustomInserter(
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MachineFunction *MF = BB->getParent();
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SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
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DebugLoc DL = MI.getDebugLoc();
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BuildMI(*BB, MI, DL, TII->get(AMDGPU::S_MOVK_I32))
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BuildMI(*BB, MI, DL, TII->get(AMDGPU::S_MOV_B32))
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.addOperand(MI.getOperand(0))
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.addImm(MFI->LDSSize);
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MI.eraseFromParent();
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@ -5,8 +5,10 @@
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@lds0 = addrspace(3) global [512 x float] undef, align 4
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@lds1 = addrspace(3) global [256 x float] undef, align 4
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@large = addrspace(3) global [4096 x i32] undef, align 4
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; CHECK-LABEL: {{^}}groupstaticsize_test0:
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; CHECK: s_movk_i32 s{{[0-9]+}}, 0x800
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; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0x800{{$}}
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define void @groupstaticsize_test0(float addrspace(1)* %out, i32 addrspace(1)* %lds_size) #0 {
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%tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
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%idx.0 = add nsw i32 %tid.x, 64
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@ -20,7 +22,7 @@ define void @groupstaticsize_test0(float addrspace(1)* %out, i32 addrspace(1)* %
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}
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; CHECK-LABEL: {{^}}groupstaticsize_test1:
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; CHECK: s_movk_i32 s{{[0-9]+}}, 0xc00
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; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0xc00{{$}}
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define void @groupstaticsize_test1(float addrspace(1)* %out, i32 %cond, i32 addrspace(1)* %lds_size) {
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entry:
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%static_lds_size = call i32 @llvm.amdgcn.groupstaticsize() #1
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@ -46,6 +48,17 @@ endif: ; preds = %else, %if
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ret void
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}
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; Exceeds 16-bit simm limit of s_movk_i32
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; CHECK-LABEL: {{^}}large_groupstaticsize:
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; CHECK: v_mov_b32_e32 [[REG:v[0-9]+]], 0x4000{{$}}
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define void @large_groupstaticsize(i32 addrspace(1)* %size, i32 %idx) #0 {
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%gep = getelementptr inbounds [4096 x i32], [4096 x i32] addrspace(3)* @large, i32 0, i32 %idx
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store volatile i32 0, i32 addrspace(3)* %gep
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%static_lds_size = call i32 @llvm.amdgcn.groupstaticsize()
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store i32 %static_lds_size, i32 addrspace(1)* %size
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ret void
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}
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declare i32 @llvm.amdgcn.groupstaticsize() #1
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declare i32 @llvm.amdgcn.workitem.id.x() #1
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