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[AMDGPU] Verify SdwaSel value range #128898

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Merged
merged 2 commits into from
Feb 27, 2025
Merged

[AMDGPU] Verify SdwaSel value range #128898

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b0e07ee
[AMDGPU] Verify SdwaSel value range
frederik-h Feb 26, 2025
2796dd0
Move and adjust test
frederik-h Feb 26, 2025
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12 changes: 12 additions & 0 deletions llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -4916,6 +4916,18 @@ bool SIInstrInfo::verifyInstruction(const MachineInstr &MI,
return false;
}

for (auto Op : {AMDGPU::OpName::src0_sel, AMDGPU::OpName::src1_sel,
AMDGPU::OpName::dst_sel}) {
const MachineOperand *MO = getNamedOperand(MI, Op);
if (!MO)
continue;
int64_t Imm = MO->getImm();
if (Imm < 0 || Imm > AMDGPU::SDWA::SdwaSel::DWORD) {
ErrInfo = "Invalid SDWA selection";
return false;
}
}

int DstIdx = AMDGPU::getNamedOperandIdx(Opcode, AMDGPU::OpName::vdst);

for (int OpIdx : {DstIdx, Src0Idx, Src1Idx, Src2Idx}) {
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22 changes: 22 additions & 0 deletions llvm/test/CodeGen/AMDGPU/verifier-sdwa-selection.mir
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
# RUN: not --crash llc -mtriple=amdgcn -mcpu=gfx1030 --verify-machineinstrs -o - %s 2>&1 | FileCheck %s

# CHECK-COUNT-6: *** Bad machine code: Invalid SDWA selection ***
# CHECK-NOT: *** Bad machine code
# CHECK: LLVM ERROR: Found 6 machine code errors

---
name: invalid_sdwa_selection
tracksRegLiveness: true
body: |
bb.0:
liveins: $vgpr0
%0:vgpr_32 = COPY $vgpr0
%1:vgpr_32 = V_LSHRREV_B32_sdwa 0, %0:vgpr_32, 0, %0:vgpr_32, 0, 1, 0, 7, 0, implicit $exec
%2:vgpr_32 = V_LSHRREV_B32_sdwa 0, %0:vgpr_32, 0, %0:vgpr_32, 0, 1, 0, -1, 0, implicit $exec
%3:vgpr_32 = V_LSHRREV_B32_sdwa 0, %0:vgpr_32, 0, %0:vgpr_32, 0, 7, 0, 6, 0, implicit $exec
%4:vgpr_32 = V_LSHRREV_B32_sdwa 0, %0:vgpr_32, 0, %0:vgpr_32, 0, -1, 0, 6, 0, implicit $exec
%5:vgpr_32 = V_LSHRREV_B32_sdwa 0, %0:vgpr_32, 0, %0:vgpr_32, 0, 0, 0, 0, 7, implicit $exec
%6:vgpr_32 = V_LSHRREV_B32_sdwa 0, %0:vgpr_32, 0, %0:vgpr_32, 0, 0, 0, 0, -1, implicit $exec

S_ENDPGM 0
...
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