AMDGPU/GlobalISel: Fix RegBankSelect for G_BUILD_VECTOR

llvm-svn: 364767

Author: arsenm

llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp

@@ -1293,7 +1293,8 @@ AMDGPURegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
     OpdsMapping[2] = nullptr;
     break;
   }
-  case AMDGPU::G_MERGE_VALUES: {
+  case AMDGPU::G_MERGE_VALUES:
+  case AMDGPU::G_BUILD_VECTOR: {
     unsigned Bank = isSALUMapping(MI) ?
       AMDGPU::SGPRRegBankID : AMDGPU::VGPRRegBankID;
     unsigned DstSize = MRI.getType(MI.getOperand(0).getReg()).getSizeInBits();

llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-build-vector.mir

@@ -0,0 +1,69 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect -regbankselect-fast -verify-machineinstrs -o - %s | FileCheck %s
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect -regbankselect-greedy -verify-machineinstrs -o - %s | FileCheck %s
+
+---
+name: build_vector_v2s32_ss
+legalized: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $sgpr1
+    ; CHECK-LABEL: name: build_vector_v2s32_ss
+    ; CHECK: [[COPY:%[0-9]+]]:sgpr(s32) = COPY $sgpr0
+    ; CHECK: [[COPY1:%[0-9]+]]:sgpr(s32) = COPY $sgpr1
+    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:sgpr(<2 x s32>) = G_BUILD_VECTOR [[COPY]](s32), [[COPY1]](s32)
+    %0:_(s32) = COPY $sgpr0
+    %1:_(s32) = COPY $sgpr1
+    %2:_(<2 x s32>) = G_BUILD_VECTOR %0, %1
+...
+
+---
+name: build_vector_v2s32_sv
+legalized: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0, $vgpr0
+    ; CHECK-LABEL: name: build_vector_v2s32_sv
+    ; CHECK: [[COPY:%[0-9]+]]:sgpr(s32) = COPY $sgpr0
+    ; CHECK: [[COPY1:%[0-9]+]]:vgpr(s32) = COPY $vgpr0
+    ; CHECK: [[COPY2:%[0-9]+]]:vgpr(s32) = COPY [[COPY]](s32)
+    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:vgpr(<2 x s32>) = G_BUILD_VECTOR [[COPY2]](s32), [[COPY1]](s32)
+    %0:_(s32) = COPY $sgpr0
+    %1:_(s32) = COPY $vgpr0
+    %2:_(<2 x s32>) = G_BUILD_VECTOR %0, %1
+...
+
+---
+name: build_vector_v2s32_vs
+legalized: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $sgpr0
+    ; CHECK-LABEL: name: build_vector_v2s32_vs
+    ; CHECK: [[COPY:%[0-9]+]]:vgpr(s32) = COPY $vgpr0
+    ; CHECK: [[COPY1:%[0-9]+]]:sgpr(s32) = COPY $sgpr0
+    ; CHECK: [[COPY2:%[0-9]+]]:vgpr(s32) = COPY [[COPY1]](s32)
+    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:vgpr(<2 x s32>) = G_BUILD_VECTOR [[COPY]](s32), [[COPY2]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $sgpr0
+    %2:_(<2 x s32>) = G_BUILD_VECTOR %0, %1
+...
+
+---
+name: build_vector_v2s32_vv
+legalized: true
+
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+    ; CHECK-LABEL: name: build_vector_v2s32_vv
+    ; CHECK: [[COPY:%[0-9]+]]:vgpr(s32) = COPY $vgpr0
+    ; CHECK: [[COPY1:%[0-9]+]]:vgpr(s32) = COPY $vgpr1
+    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:vgpr(<2 x s32>) = G_BUILD_VECTOR [[COPY]](s32), [[COPY1]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(<2 x s32>) = G_BUILD_VECTOR %0, %1
+...