[EXTERNAL] Fix v_mov_b16_t16 index in folding pass

external/llvm-project/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp

@@ -931,7 +931,9 @@ static MachineOperand *lookUpCopyChain(const SIInstrInfo &TII,
   for (MachineInstr *SubDef = MRI.getVRegDef(SrcReg);
        SubDef && TII.isFoldableCopy(*SubDef);
        SubDef = MRI.getVRegDef(Sub->getReg())) {
-    MachineOperand &SrcOp = SubDef->getOperand(1);
+    unsigned SrcIdx = TII.getFoldableCopySrcIdx(*SubDef);
+    MachineOperand &SrcOp = SubDef->getOperand(SrcIdx);
+
     if (SrcOp.isImm())
       return &SrcOp;
     if (!SrcOp.isReg() || SrcOp.getReg().isPhysical())

external/llvm-project/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

@@ -3479,6 +3479,32 @@ bool SIInstrInfo::isFoldableCopy(const MachineInstr &MI) {
   }
 }
 
+unsigned SIInstrInfo::getFoldableCopySrcIdx(const MachineInstr &MI) {
+  switch (MI.getOpcode()) {
+  case AMDGPU::V_MOV_B16_t16_e32:
+  case AMDGPU::V_MOV_B16_t16_e64:
+    return 2;
+  case AMDGPU::V_MOV_B32_e32:
+  case AMDGPU::V_MOV_B32_e64:
+  case AMDGPU::V_MOV_B64_PSEUDO:
+  case AMDGPU::V_MOV_B64_e32:
+  case AMDGPU::V_MOV_B64_e64:
+  case AMDGPU::S_MOV_B32:
+  case AMDGPU::S_MOV_B64:
+  case AMDGPU::S_MOV_B64_IMM_PSEUDO:
+  case AMDGPU::COPY:
+  case AMDGPU::WWM_COPY:
+  case AMDGPU::V_ACCVGPR_WRITE_B32_e64:
+  case AMDGPU::V_ACCVGPR_READ_B32_e64:
+  case AMDGPU::V_ACCVGPR_MOV_B32:
+  case AMDGPU::AV_MOV_B32_IMM_PSEUDO:
+  case AMDGPU::AV_MOV_B64_IMM_PSEUDO:
+    return 1;
+  default:
+    llvm_unreachable("MI is not a foldable copy");
+  }
+}
+
 static constexpr AMDGPU::OpName ModifierOpNames[] = {
     AMDGPU::OpName::src0_modifiers, AMDGPU::OpName::src1_modifiers,
     AMDGPU::OpName::src2_modifiers, AMDGPU::OpName::clamp,

external/llvm-project/llvm/lib/Target/AMDGPU/SIInstrInfo.h

@@ -433,6 +433,7 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
                                   const MachineInstr &MIb) const override;
 
   static bool isFoldableCopy(const MachineInstr &MI);
+  static unsigned getFoldableCopySrcIdx(const MachineInstr &MI);
 
   void removeModOperands(MachineInstr &MI) const;
 

external/llvm-project/llvm/test/CodeGen/AMDGPU/true16-fold.mir

@@ -59,6 +59,7 @@ body:             |
     %4:vgpr_16 = COPY %3:sgpr_lo16
     %5:vgpr_32 = V_ALIGNBIT_B32_t16_e64 0, %0:sreg_32, 0, killed %1:sreg_32, 0, killed %4:vgpr_16, 0, 0, implicit $exec
     S_ENDPGM 0, implicit %5
+...
 
 ---
 name:            fold_16bit_madmix_clamp
@@ -197,3 +198,28 @@ body:             |
     $vgpr0 = COPY %4
     S_ENDPGM 0, implicit $vgpr0
 ...
+
+---
+name:            fold_imm16_across_reg_sequence
+tracksRegLiveness: true
+registers:
+body:             |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2
+    ; CHECK-LABEL: name: fold_imm16_across_reg_sequence
+    ; CHECK: liveins: $vgpr0, $vgpr1, $vgpr2
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[V_MOV_B16_t16_e64_:%[0-9]+]]:vgpr_16 = V_MOV_B16_t16_e64 0, -1, 0, implicit $exec
+    ; CHECK-NEXT: [[V_MOV_B16_t16_e64_1:%[0-9]+]]:vgpr_16 = V_MOV_B16_t16_e64 0, -1, 0, implicit $exec
+    ; CHECK-NEXT: [[REG_SEQUENCE:%[0-9]+]]:vgpr_32 = REG_SEQUENCE [[V_MOV_B16_t16_e64_]], %subreg.lo16, [[V_MOV_B16_t16_e64_1]], %subreg.hi16
+    ; CHECK-NEXT: [[V_MAX_F32_e64_:%[0-9]+]]:vgpr_32 = nofpexcept V_MAX_F32_e64 0, -1, 0, -1, 0, 0, implicit $mode, implicit $exec
+    ; CHECK-NEXT: $vgpr0 = COPY [[V_MAX_F32_e64_]]
+    ; CHECK-NEXT: S_ENDPGM 0, implicit $vgpr0
+    %0:vgpr_16 = V_MOV_B16_t16_e64 0, -1, 0, implicit $exec
+    %1:vgpr_16 = V_MOV_B16_t16_e64 0, -1, 0, implicit $exec
+    %2:vgpr_32 = REG_SEQUENCE %0, %subreg.lo16, %1, %subreg.hi16
+    %3:vgpr_32 = nofpexcept V_MAX_F32_e64 0, %2, 0, %2, 0, 0, implicit $mode, implicit $exec
+    $vgpr0 = COPY %3
+    S_ENDPGM 0, implicit $vgpr0
+...
+

mlir/test/fusion/pr-e2e/attention/mixr-attention-small-decode.mlir

@@ -0,0 +1,39 @@
+// This is a design that was in the MIGraphX CI that was previously failing
+// here: https://ontrack-internal.amd.com/browse/SWDEV-558297
+
+// RUN: rocmlir-gen -fut mlir_attention --arch %arch --clone-harness %s | rocmlir-driver -kernel-pipeline=migraphx | rocmlir-driver -host-pipeline=migraphx,highlevel | rocmlir-gen -ph -rand 1 -rand_type float -fut mlir_attention_wrapper --verifier clone - | rocmlir-driver -host-pipeline mhal -kernel-pipeline full | xmir-runner --shared-libs=%linalg_test_lib_dir/libmlir_rocm_runtime%shlibext,%conv_validation_wrapper_library_dir/libconv-validation-wrappers%shlibext,%linalg_test_lib_dir/libmlir_runner_utils%shlibext,%linalg_test_lib_dir/libmlir_float16_utils%shlibext,%linalg_test_lib_dir/libmlir_c_runner_utils%shlibext,%linalg_test_lib_dir/libmlir_async_runtime%shlibext --entry-point-result=void | FileCheck %s
+
+module {
+  // CHECK: [1 1 1]
+  func.func @mlir_attention(
+        %arg0: !migraphx.shaped<1x1x12xf16, 12x12x1>,
+        %arg1: !migraphx.shaped<1x2x4x2xf16, 16x8x2x1>,
+        %arg2: !migraphx.shaped<1x2x4x2xf16, 16x8x2x1>,
+        %arg3: !migraphx.shaped<1x1xsi32, 1x1>
+    ) -> !migraphx.shaped<1x1x4xf16, 4x4x1> attributes {arch = "", kernel = "mixr", num_cu = 0 : i64} {
+    %0 = migraphx.literal(dense<[0, 1, 2, 3]> : tensor<4xsi32>) : <4xsi32, 1>
+    %1 = migraphx.literal(dense<0xFC00> : tensor<1xf16>) : <1xf16, 1>
+    %2 = migraphx.literal(dense<1.000000e+00> : tensor<1xf16>) : <1xf16, 1>
+    %3 = migraphx.reshape %arg0 {dims = [1, 1, 6, 2]} : <1x1x12xf16, 12x12x1> -> <1x1x6x2xf16, 12x12x2x1>
+    %4 = migraphx.transpose %3 {permutation = [0, 2, 1, 3]} : <1x1x6x2xf16, 12x12x2x1> -> <1x6x1x2xf16, 12x2x12x1>
+    %5 = migraphx.multibroadcast %arg3 {out_dyn_dims = [], out_lens = [1, 2]} : <1x1xsi32, 1x1> -> <1x2xsi32, 1x0>
+    %6 = migraphx.slice %4 {axes = [1], ends = [2], starts = [0]} : <1x6x1x2xf16, 12x2x12x1> -> <1x2x1x2xf16, 12x2x12x1>
+    %7 = migraphx.transpose %arg1 {permutation = [0, 1, 3, 2]} : <1x2x4x2xf16, 16x8x2x1> -> <1x2x2x4xf16, 16x8x1x2>
+    %8 = migraphx.dot %6, %7 : <1x2x1x2xf16, 12x2x12x1>, <1x2x2x4xf16, 16x8x1x2> -> <1x2x1x4xf16, 8x4x4x1>
+    %9 = migraphx.multibroadcast %0 {out_dyn_dims = [], out_lens = [1, 2, 1, 4]} : <4xsi32, 1> -> <1x2x1x4xsi32, 0x0x0x1>
+    %10 = migraphx.multibroadcast %1 {out_dyn_dims = [], out_lens = [1, 2, 1, 4]} : <1xf16, 1> -> <1x2x1x4xf16, 0x0x0x0>
+    %11 = migraphx.multibroadcast %2 {out_dyn_dims = [], out_lens = [1, 2, 1, 4]} : <1xf16, 1> -> <1x2x1x4xf16, 0x0x0x0>
+    %12 = migraphx.mul %8, %11 : <1x2x1x4xf16, 8x4x4x1>, <1x2x1x4xf16, 0x0x0x0> -> <1x2x1x4xf16, 8x4x4x1>
+    %13 = migraphx.reshape %5 {dims = [1, 2, 1, 1]} : <1x2xsi32, 1x0> -> <1x2x1x1xsi32, 2x1x1x1>
+    %14 = migraphx.multibroadcast %13 {out_dyn_dims = [], out_lens = [1, 2, 1, 4]} : <1x2x1x1xsi32, 2x1x1x1> -> <1x2x1x4xsi32, 2x1x1x0>
+    %15 = migraphx.greater %9, %14 : <1x2x1x4xsi32, 0x0x0x1>, <1x2x1x4xsi32, 2x1x1x0> -> <1x2x1x4xsi32, 8x4x4x1>
+    %16 = migraphx.convert %15 {target_type = 0 : i64} : <1x2x1x4xsi32, 8x4x4x1> to <1x2x1x4xsi8, 8x4x4x1>
+    %17 = migraphx.where %16, %10, %12 : <1x2x1x4xsi8, 8x4x4x1>, <1x2x1x4xf16, 0x0x0x0>, <1x2x1x4xf16, 8x4x4x1> -> <1x2x1x4xf16, 8x4x4x1>
+    %18 = migraphx.softmax %17 {axis = 3 : i64} : <1x2x1x4xf16, 8x4x4x1> -> <1x2x1x4xf16, 8x4x4x1>
+    %19 = migraphx.dot %18, %arg2 : <1x2x1x4xf16, 8x4x4x1>, <1x2x4x2xf16, 16x8x2x1> -> <1x2x1x2xf16, 4x2x2x1>
+    %20 = migraphx.transpose %19 {permutation = [0, 2, 1, 3]} : <1x2x1x2xf16, 4x2x2x1> -> <1x1x2x2xf16, 4x2x2x1>
+    %21 = migraphx.reshape %20 {dims = [1, 1, 4]} : <1x1x2x2xf16, 4x2x2x1> -> <1x1x4xf16, 4x4x1>
+    return %21 : !migraphx.shaped<1x1x4xf16, 4x4x1>
+  }
+}
+