[AMDGPU] GFX11: remove ShaderType from ds_ordered_count offset field

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Summary

In GFX11 ShaderType is determined by the hardware and should no longer
be written into bits[3:2] of the ds_ordered_count offset field.

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Rebase on precommitted test.

llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp

bool AMDGPUInstructionSelector::selectDSOrderedIntrinsic(
 
   if (IndexOperand)
     report_fatal_error("ds_ordered_count: bad index operand");
 
   unsigned Instruction = IntrID == Intrinsic::amdgcn_ds_ordered_add ? 0 : 1;
   unsigned ShaderType = SIInstrInfo::getDSShaderTypeValue(*MF);
 
   unsigned Offset0 = OrderedCountIndex << 2;
-  unsigned Offset1 = WaveRelease | (WaveDone << 1) | (ShaderType << 2) |
-                     (Instruction << 4);
+  unsigned Offset1 = WaveRelease | (WaveDone << 1) | (Instruction << 4);
 
   if (STI.getGeneration() >= AMDGPUSubtarget::GFX10)
     Offset1 |= (CountDw - 1) << 6;
 
+  if (STI.getGeneration() < AMDGPUSubtarget::GFX11)
+    Offset1 |= ShaderType << 2;
+
   unsigned Offset = Offset0 | (Offset1 << 8);
 
   Register M0Val = MI.getOperand(2).getReg();
   BuildMI(*MBB, &MI, DL, TII.get(AMDGPU::COPY), AMDGPU::M0)
     .addReg(M0Val);
 
   Register DstReg = MI.getOperand(0).getReg();
   Register ValReg = MI.getOperand(3).getReg();

llvm/lib/Target/AMDGPU/SIISelLowering.cpp

case Intrinsic::amdgcn_ds_ordered_swap: {
 
     if (WaveDone && !WaveRelease)
       report_fatal_error("ds_ordered_count: wave_done requires wave_release");
 
     unsigned Instruction = IntrID == Intrinsic::amdgcn_ds_ordered_add ? 0 : 1;
     unsigned ShaderType =
         SIInstrInfo::getDSShaderTypeValue(DAG.getMachineFunction());
     unsigned Offset0 = OrderedCountIndex << 2;
-    unsigned Offset1 = WaveRelease | (WaveDone << 1) | (ShaderType << 2) |
-                       (Instruction << 4);
+    unsigned Offset1 = WaveRelease | (WaveDone << 1) | (Instruction << 4);
 
     if (Subtarget->getGeneration() >= AMDGPUSubtarget::GFX10)
       Offset1 |= (CountDw - 1) << 6;
 
+    if (Subtarget->getGeneration() < AMDGPUSubtarget::GFX11)
+      Offset1 |= ShaderType << 2;
+
     unsigned Offset = Offset0 | (Offset1 << 8);
 
     SDValue Ops[] = {
       Chain,
       Value,
       DAG.getTargetConstant(Offset, DL, MVT::i16),
       copyToM0(DAG, Chain, DL, M0).getValue(1), // Glue
     };

llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ds.ordered.add.gfx11.ll

define amdgpu_cs float @ds_ordered_add_cs(i32 addrspace(2)* inreg %gds) {
   %val = call [e-mail](i32 addrspace(2)* %gds, i32 31, i32 0, i32 0, i1 false, i32 16777217, i1 true, i1 true)
   %r = bitcast i32 %val to float
   ret float %r
 }
 
 ; FUNC-LABEL: {{^}}ds_ordered_add_ps:
 ; GCN: v_mov_b32_e32 v[[INCR:[0-9]+]], 31
 ; GCN: s_mov_b32 m0, s0
-; GCN-NEXT: ds_ordered_count v{{[0-9]+}}, v[[INCR]] offset:1796 gds
+; GCN-NEXT: ds_ordered_count v{{[0-9]+}}, v[[INCR]] offset:772 gds
 ; GCN-NEXT: s_waitcnt expcnt(0) lgkmcnt(0)
 define amdgpu_ps float @ds_ordered_add_ps(i32 addrspace(2)* inreg %gds) {
   %val = call [e-mail](i32 addrspace(2)* %gds, i32 31, i32 0, i32 0, i1 false, i32 16777217, i1 true, i1 true)
   %r = bitcast i32 %val to float
   ret float %r
 }
 
 ; FUNC-LABEL: {{^}}ds_ordered_add_vs:
 ; GCN: v_mov_b32_e32 v[[INCR:[0-9]+]], 31
 ; GCN: s_mov_b32 m0, s0
-; GCN-NEXT: ds_ordered_count v{{[0-9]+}}, v[[INCR]] offset:2820 gds
+; GCN-NEXT: ds_ordered_count v{{[0-9]+}}, v[[INCR]] offset:772 gds
 ; GCN-NEXT: s_waitcnt expcnt(0) lgkmcnt(0)
 define amdgpu_vs float @ds_ordered_add_vs(i32 addrspace(2)* inreg %gds) {
   %val = call [e-mail](i32 addrspace(2)* %gds, i32 31, i32 0, i32 0, i1 false, i32 16777217, i1 true, i1 true)
   %r = bitcast i32 %val to float
   ret float %r
 }
 
 ; FUNC-LABEL: {{^}}ds_ordered_add_gs:
 ; GCN: v_mov_b32_e32 v[[INCR:[0-9]+]], 31
 ; GCN: s_mov_b32 m0, s0
-; GCN-NEXT: ds_ordered_count v{{[0-9]+}}, v[[INCR]] offset:3844 gds
+; GCN-NEXT: ds_ordered_count v{{[0-9]+}}, v[[INCR]] offset:772 gds
 ; GCN-NEXT: s_waitcnt expcnt(0) lgkmcnt(0)
 define amdgpu_gs float @ds_ordered_add_gs(i32 addrspace(2)* inreg %gds) {
   %val = call [e-mail](i32 addrspace(2)* %gds, i32 31, i32 0, i32 0, i1 false, i32 16777217, i1 true, i1 true)
   %r = bitcast i32 %val to float
   ret float %r
 }
 
 declare i32 @llvm.amdgcn.ds.ordered.add(i32 addrspace(2)* nocapture, i32, i32, i32, i1, i32, i1, i1)