AMDGPU/GlobalISel: InstrMapping for G_UNMERGE_VALUES
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350588 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp b/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
index f2a8f89..fd3c948 100644
--- a/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
+++ b/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
@@ -562,6 +562,18 @@
break;
}
+ case AMDGPU::G_UNMERGE_VALUES: {
+ unsigned Bank = isSALUMapping(MI) ? AMDGPU::SGPRRegBankID :
+ AMDGPU::VGPRRegBankID;
+
+ // Op1 and Dst should use the same register bank.
+ // FIXME: Shouldn't this be the default? Why do we need to handle this?
+ for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
+ unsigned Size = getSizeInBits(MI.getOperand(i).getReg(), MRI, *TRI);
+ OpdsMapping[i] = AMDGPU::getValueMapping(Bank, Size);
+ }
+ break;
+ }
case AMDGPU::G_INTRINSIC: {
switch (MI.getOperand(1).getIntrinsicID()) {
default:
diff --git a/test/CodeGen/AMDGPU/GlobalISel/regbankselect-unmerge-values.mir b/test/CodeGen/AMDGPU/GlobalISel/regbankselect-unmerge-values.mir
new file mode 100644
index 0000000..5a30572
--- /dev/null
+++ b/test/CodeGen/AMDGPU/GlobalISel/regbankselect-unmerge-values.mir
@@ -0,0 +1,38 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect -global-isel %s -verify-machineinstrs -o - -regbankselect-fast | FileCheck %s
+
+---
+name: test_unmerge_s64_s32_s
+legalized: true
+
+body: |
+ bb.0:
+ liveins: $sgpr0_sgpr1
+ ; CHECK-LABEL: name: test_unmerge_s64_s32_s
+ ; CHECK: [[COPY:%[0-9]+]]:sgpr(s64) = COPY $sgpr0_sgpr1
+ ; CHECK: [[UV:%[0-9]+]]:sgpr(s32), [[UV1:%[0-9]+]]:sgpr(s32) = G_UNMERGE_VALUES [[COPY]](s64)
+ ; CHECK: $vgpr0 = COPY [[UV]](s32)
+ ; CHECK: $vgpr2 = COPY [[UV]](s32)
+ %0:_(s64) = COPY $sgpr0_sgpr1
+ %1:_(s32), %2:_(s32) = G_UNMERGE_VALUES %0:_(s64)
+ $vgpr0 = COPY %1(s32)
+ $vgpr2 = COPY %1(s32)
+...
+
+---
+name: test_unmerge_s64_s32_v
+legalized: true
+
+body: |
+ bb.0:
+ liveins: $vgpr0_vgpr1
+ ; CHECK-LABEL: name: test_unmerge_s64_s32_v
+ ; CHECK: [[COPY:%[0-9]+]]:vgpr(s64) = COPY $vgpr0_vgpr1
+ ; CHECK: [[UV:%[0-9]+]]:vgpr(s32), [[UV1:%[0-9]+]]:vgpr(s32) = G_UNMERGE_VALUES [[COPY]](s64)
+ ; CHECK: $vgpr0 = COPY [[UV]](s32)
+ ; CHECK: $vgpr2 = COPY [[UV]](s32)
+ %0:_(s64) = COPY $vgpr0_vgpr1
+ %1:_(s32), %2:_(s32) = G_UNMERGE_VALUES %0:_(s64)
+ $vgpr0 = COPY %1(s32)
+ $vgpr2 = COPY %1(s32)
+...
