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AMDGPU/GlobalISel: InstrMapping for G_UNMERGE_VALUES

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llvm-svn: 350588
This commit is contained in:
Matt Arsenault 2019-01-08 00:46:19 +00:00
parent c8bea0c722
commit 8fd3b56e7a
2 changed files with 50 additions and 0 deletions
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12
lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
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@ -562,6 +562,18 @@ AMDGPURegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
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:

38
test/CodeGen/AMDGPU/GlobalISel/regbankselect-unmerge-values.mir Normal file
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@ -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)
...